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10514 Commits

Author SHA1 Message Date
Chris Lattner
bfed9247f1 fix the assertion 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21994 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 23:35:47 +00:00
Chris Lattner
a8217e3000 Align doubles on 8-byte boundaries if possible. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21993 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 23:14:17 +00:00
Chris Lattner
0db07092a7 print stack object alignment in -print-machineinstr dumps 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21992 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 22:54:44 +00:00
Chris Lattner
653f7230ad fix typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21991 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 22:46:57 +00:00
Chris Lattner
06cebb456a Fix the problems with callee popped argument lists 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21988 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 22:13:49 +00:00
Chris Lattner
ca96c8217d Don't emit SAR X, 0 in the case of sdiv Y, 2 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21986 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 21:50:27 +00:00
Chris Lattner
a96e577f53 Fix UnitTests/2005-05-13-SDivTwo.c 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21985 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 21:48:20 +00:00
Chris Lattner
3648c67eb2 switch to having the callee pop stack operands for fastcc. This is currently buggy 
do not use


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21984 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 21:44:04 +00:00
Chris Lattner
2a82ef317c Tolerate instrs with extra args 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21982 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 21:07:15 +00:00
Chris Lattner
24ddc6d067 allow RETI 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21980 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 20:46:35 +00:00
Chris Lattner
b5d8e6ece6 treat TAILCALL nodes identically to CALL nodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21977 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 20:29:26 +00:00
Chris Lattner
2e7714ad2b Build TAILCALL nodes in LowerCallTo, treat them like normal calls everywhere. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21976 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 20:29:13 +00:00
Chris Lattner
4bf7afcc27 Capitalize 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21964 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 19:49:09 +00:00
Chris Lattner
7d93727bb2 capitalize 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21962 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 19:48:34 +00:00
Chris Lattner
f8492193b9 clarify that these are v9 options 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21960 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 19:45:45 +00:00
Chris Lattner
6bc2dc7b2c hide this option 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21959 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 19:44:21 +00:00
Chris Lattner
adf6a965a3 Add an isTailCall flag to LowerCallTo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21958 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 18:50:42 +00:00
Chris Lattner
d71c04199c Handle TAILCALL node 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21957 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 18:43:43 +00:00
Chris Lattner
1be4811d34 add 'ret imm' instruction 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21945 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 17:56:48 +00:00
Chris Lattner
32f3cf612e Realize that we don't support fmod directly, fixing CodeGen/Generic/print-arith-fp.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21939 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 16:20:22 +00:00
Chris Lattner
63602fb868 Do not CopyFromReg physregs for live-in values. Instead, create a vreg for 
each live in, and copy the regs from the vregs.  As the very first thing we
do in the function, insert copies from the pregs to the vregs.  This fixes
problems where the token chain of CopyFromReg was not enough to allow reordering
of the copyfromreg nodes and other unchained nodes (e.g. div, which clobbers
eax on intel).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21932 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 07:38:09 +00:00
Chris Lattner
405ef9e28d Emit function entry code after lowering hte arguments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21931 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 07:33:32 +00:00
Chris Lattner
3aa7832c82 Allow targets to emit code into the entry block of each function 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21930 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 07:23:21 +00:00
Chris Lattner
08b22ecc88 calling a function with the wrong CC is undefined, turn it into an unreachable 
instruction.  This is useful for catching optimizers that don't preserve
calling conventions


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21928 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 07:09:09 +00:00
Chris Lattner
712ad0c36d allow a virtual register to be associated with live-in values. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21927 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 07:08:07 +00:00
Reid Spencer
fe07581d78 Make sure that decompression checks for the case that bzip2 returns 
BZ_OK (meaning more data is expected) but there is no more input data. In
this case, the input file is probably truncated. Generate an exception that
indicates this case when its detected.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21926 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 07:05:37 +00:00
Chris Lattner
efd9168eae When lowering invokes to calls, amke sure to preserve the calling conv. This 
fixes Ptrdist/anagram with x86 llcbeta


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21925 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 06:27:02 +00:00
Chris Lattner
1381dd8a6e Prefer int 0 instead of long 0 for GEP arguments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21924 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 06:10:12 +00:00
Chris Lattner
eb516e7f0a Fix a problem that nate reduced for me. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21923 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 05:17:00 +00:00
Chris Lattner
9530ddcc60 rename variables and functions to match renamed DAG nodes. Bonus feature: 
I can actually remember which one is which now!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21922 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 05:09:11 +00:00
Chris Lattner
66de05b606 do not call expandop on the same value more than once. This fixes 
X86/2004-02-22-Casts.llx


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21919 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 04:45:13 +00:00
Chris Lattner
a364fa126a fix a bad typeo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21917 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 23:51:40 +00:00
Chris Lattner
128b52d3d7 update comment 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21916 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 23:24:44 +00:00
Chris Lattner
16cd04d26c rename the ADJCALLSTACKDOWN/ADJCALLSTACKUP nodes to be CALLSEQ_START/BEGIN. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21915 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 23:24:06 +00:00
Chris Lattner
c6f4181923 Add a new -enable-x86-fastcc option that enables passing the first 
two integer values in registers for the fastcc calling conv.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21912 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 23:06:28 +00:00
Chris Lattner
9092fa310c Pass calling convention to use into lower call to 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21900 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 19:56:57 +00:00
Chris Lattner
c57f682113 Pass in Calling Convention to use into LowerCallTo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21899 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 19:56:45 +00:00
Chris Lattner
6649418598 Enable pattern isel by default 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21898 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 19:56:09 +00:00
Chris Lattner
3becf2026b fix expansion of ct[lt]z nodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21896 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 19:27:51 +00:00
Chris Lattner
39a8f33630 Expand 64-bit ctlz/cttz nodes for 32-bit targets 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21895 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 19:05:01 +00:00
Chris Lattner
383203b003 Fix uint->fp casts on PPC, allowing UnitTests/2005-05-12-Int64ToFP to 
work on it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21894 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 18:52:34 +00:00
Chris Lattner
45982dad53 Allow something to be legalized multiple times. This can be used to reduce 
legalization iteration


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21892 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 16:53:42 +00:00
Chris Lattner
13689e2009 Oops, don't do this after we figure out where to insert the call chains. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21890 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 07:00:44 +00:00
Chris Lattner
44d105b7fa Make sure to expand all nodes, avoiding unintentional node duplication. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21889 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 06:54:21 +00:00
Chris Lattner
6980d8295f handle a common case generated by the uint64 -> FP code path better 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21888 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 06:27:02 +00:00
Chris Lattner
e131e5b81e add fixme 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21887 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 06:04:14 +00:00
Chris Lattner
4b3141d324 Fix a really horrible problem that causes the JIT to miscompile any program 
that use 64-bit integers on 32-bit hosts.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21886 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 06:01:28 +00:00
Chris Lattner
b9fa3bc8f3 Fix a problem where early legalization can cause token chain problems. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21885 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 04:49:08 +00:00
Chris Lattner
9bce0f92c3 These targets don't like setcc 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21884 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 02:06:00 +00:00
Chris Lattner
88de6e77bf Make legalize a bit more efficient, and canonicalize sub X, C -> add X, -C 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21882 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 00:17:04 +00:00
Nate Begeman
d7c4a4a6c0 Necessary changes to codegen cttz efficiently on PowerPC 
1. Teach LegalizeDAG how to better legalize CTTZ if the target doesn't have
   CTPOP, but does have CTLZ
2. Teach PPC32 how to do sub x, const -> add x, -const for valid consts
3. Teach PPC32 how to do and (xor a, -1) b -> andc b, a
4. Teach PPC32 that ISD::CTLZ -> PPC::CNTLZW


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21880 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 23:43:56 +00:00
Tanya Lattner
d977095838 Fixed issue that broke ssa. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21878 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 21:45:03 +00:00
Chris Lattner
4548a0ed32 fix some GCC 4 warnings 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21877 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 21:40:40 +00:00
John Criswell
3163e2d9f3 Added support for decomposing constant expressions containing shr and shl 
instructions.
Review of this commit would be greatly appreciated.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21876 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 21:16:42 +00:00
Chris Lattner
98cf45bbf6 Fix lowering of ctlz, so now UnitTests/2005-05-11-Popcount-ffs-fls passes 
with the CBE


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21875 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 20:24:12 +00:00
Chris Lattner
a801172e50 Fix lowering of cttz to work with signed values 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21874 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 20:02:14 +00:00
Chris Lattner
86f3e0c24e fix and concisify intinsic lowering for ctpop. Unfortunately, this code 
looks completely untested. :(


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21873 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 19:42:05 +00:00
Chris Lattner
0d67f0c80f Fix the last remaining bug preventing us from switching the X86 BE over 
from the simple isel to the pattern isel.  This forces inserted libcalls
to serialize against other function calls, which was breaking
UnitTests/2005-05-12-Int64ToFP.  Hopefully this will fix issues on other
targets as well.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21872 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 19:02:11 +00:00
Chris Lattner
27e9b41464 Do not memoize ADJCALLSTACKDOWN nodes, provide a method to hack on them. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21871 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 18:57:39 +00:00
Chris Lattner
16ce0df927 wrap long line 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21870 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 18:57:06 +00:00
Chris Lattner
5c33c9a166 Make sure to legalize generated ctpop nodes, convert tabs to spaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21868 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 18:35:21 +00:00
Duraid Madina
57ff7e5f64 expand count-leading/trailing-zeros; the test 2005-05-11-Popcount-ffs-fls.c 
should now pass (the "LLVM" and "REF" results should be identical)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21866 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 08:45:08 +00:00
Chris Lattner
18aa680a96 Add some notes for expanding clz/ctz 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21862 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 05:27:09 +00:00
Chris Lattner
e3ef0a8b9f Simplify this code, use the proper shift amount 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21861 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 05:21:31 +00:00
Duraid Madina
63bbed536c add the popcount instruction and support this in the isel 
the primary user of this will probably end up being find-first-set-bit/find-
last-set-bit, which i'll get around to...


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21860 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 05:16:09 +00:00
Chris Lattner
9b583b4910 Legalize this correctly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21859 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 05:09:47 +00:00
Chris Lattner
1f38e5c431 No really IA*64* :) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21858 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 05:03:56 +00:00
Chris Lattner
c610d4267f X86 has more than just 32-bit registers 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21857 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 05:00:34 +00:00
Chris Lattner
edb1add9a0 implement expansion of ctpop nodes, implementing CodeGen/Generic/llvm-ct-intrinsics.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21856 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 04:51:16 +00:00
Chris Lattner
276260b16d Print bit count nodes correctly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21855 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 04:50:30 +00:00
Chris Lattner
6d5857e139 Do not use "" as a sentinal for a missing argument! This fixes PR560. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21850 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-10 23:20:17 +00:00
Misha Brukman
b5cd8459df Why output multiple strings, let the compiler concatenate them for us for free 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21845 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-10 22:03:50 +00:00
Misha Brukman
5a2a3826ef * Convert tabs to spaces, fix code alignment 
* Remove trailing whitespace
* Wrap long lines


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21844 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-10 22:02:28 +00:00
Chris Lattner
6415bb4c29 Convert feature of the simple isel over for the pattern isel to use. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21840 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-10 03:53:18 +00:00
Chris Lattner
641f02f10f Fix Reassociate/shifttest.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21839 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-10 03:39:25 +00:00
Jeff Cohen
19bb2283e6 Silence some VC++ warnings 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21838 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-10 02:22:38 +00:00
Chris Lattner
7f78f218fd If a function contains no allocas, all of the calls in it are trivially 
suitable for tail calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21836 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 23:51:13 +00:00
Chris Lattner
ef311aa7cf The semantics of cast X to bool are a comparison against zero, not a truncation! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21833 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 22:17:13 +00:00
Chris Lattner
966cdfb600 Implement READPORT/WRITEPORT, implementing the last X86 regression tests 
that were failing with the pattern selector.  Note that the support that
existed in the simple selector was clearly broken in several ways though
(which has also been fixed).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21831 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 21:17:38 +00:00
Chris Lattner
cecd67b432 do not emit illegal instructions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21830 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 21:06:04 +00:00
Chris Lattner
82c7897f49 Fix the syntax of the i/o instructions, these are obviously unused. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21829 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 20:49:20 +00:00
Chris Lattner
4e6ce5f9c7 legalize readio/writeio into load/stores, fixing CodeGen/X86/io.llx with 
the pattern isel.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21828 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 20:37:29 +00:00
Chris Lattner
6d5b8e1646 legalize readio/writeio into a load/store if requested 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21827 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 20:36:57 +00:00
Chris Lattner
52d08bd9d8 legalize READPORT, WRITEPORT, READIO, WRITEIO, at least in the basic cases 
where they are directly supported by the architecture.  Wrap a bunch of
long lines :(


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21826 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 20:23:03 +00:00
Chris Lattner
d0f6c1f52d Add support for matching the READPORT, WRITEPORT, READIO, WRITEIO intrinsics 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21825 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 20:22:36 +00:00
Chris Lattner
3c6910153c Add support for READPORT, WRITEPORT, READIO, WRITEIO 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21824 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 20:22:17 +00:00
Chris Lattner
a0dbf181e0 restore some non-dead code I removed last night breaking double casts to 
uint


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21821 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 18:37:02 +00:00
Chris Lattner
cafb67b250 fold and (shl X, C1), C2 -> rlwinm when possible. Many other cases are possible, 
include and (srl)    and the inverses (shl and) etc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21820 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 17:39:48 +00:00
Chris Lattner
57aa5961a9 Fold shifts into subsequent SHL's. These shifts often arise due to addrses 
arithmetic lowering.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21818 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 17:06:45 +00:00
Duraid Madina
8a3042c872 fix and cleanup constmul code a bit, this fixes mediabench/toast and 
probably a couple of other tests.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21814 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 13:18:34 +00:00
Chris Lattner
a80d2bd89c Wrap long lines, remove dead code that is now handled by legalize 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21811 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 05:40:26 +00:00
Chris Lattner
2afa1910d4 Fix FP -> bool casts 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21810 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 05:33:18 +00:00
Chris Lattner
6e4c6495eb implement and.ll:test33 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21809 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 04:58:36 +00:00
Chris Lattner
fd414a27fd Don't use the load/store instruction as the source pointer, use the pointer 
being stored/loaded through!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21806 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 04:28:51 +00:00
Chris Lattner
0437cdd6dc memoize all nodes, even null Value* nodes. Do not add two token chain outputs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21805 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 04:14:13 +00:00
Chris Lattner
369e6db9b6 wrap long lines 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21804 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 04:08:33 +00:00
Chris Lattner
2bf3c26b2b Print SrcValue nodes correctly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21803 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 04:08:27 +00:00
Chris Lattner
e3e0f2765a Fix X86/2005-05-08-FPStackifierPHI.ll: ugly gross hack. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21801 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 03:36:39 +00:00
Chris Lattner
cb9048a6e8 Preserve CC's when linking modules 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21799 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 01:09:39 +00:00
Chris Lattner
f201dbc1a4 Preserve calling conventions when doing IPO 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21798 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 01:05:50 +00:00
Chris Lattner
c154cef9a1 wrap long lines, preserve calling conventions when cloning functions and 
turning calls into invokes


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21797 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 01:04:34 +00:00
Chris Lattner
42e3c81c5f By definition, 'tail' calls cannot access the stack frame of their caller. 
Expose this as a simple form of mod/ref information.  This implements
BasicAA/tailcall-modref.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21796 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-08 23:58:12 +00:00
Chris Lattner
37c121acf4 Verify that varargs functions all have ccc 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21792 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-08 22:27:09 +00:00
Chris Lattner
fb217adf92 Convert non-address taken functions with C calling conventions to fastcc. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21791 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-08 22:18:06 +00:00
Chris Lattner
44b8c7d5d3 Implement Reassociate/mul-neg-add.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21788 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-08 21:41:35 +00:00
Chris Lattner
6f156856ca Bail out earlier 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21786 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-08 21:33:47 +00:00
Chris Lattner
f33151aff0 Teach reassociate that 0-X === X*-1 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21785 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-08 21:28:52 +00:00
Chris Lattner
9c72319938 Fix PR557 and basictest[34].ll. 
This makes reassociate realize that loads should be treated as unmovable, and
gives distinct ranks to distinct values defined in the same basic block, allowing
reassociate to do its thing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21783 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-08 20:57:04 +00:00
Chris Lattner
c9fd097a01 Add debugging information 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21781 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-08 20:09:57 +00:00
Chris Lattner
989f6229bc eliminate gotos 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21780 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-08 19:48:43 +00:00
Chris Lattner
1f243e9f43 Wrap long lines. Fix "warning: conflicting types for built-in function 'memset'" 
warning from the CBE+GCC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21779 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-08 19:46:29 +00:00
Chris Lattner
109d34d6ff Improve reassociation handling of inverses, implementing inverses.ll. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21778 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-08 18:59:37 +00:00
Chris Lattner
928128281f clean up and modernize this pass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21776 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-08 18:45:26 +00:00
Chris Lattner
120347e8d1 Strength reduce SAR into SHR if there is no way sign bits could be shifted 
in.  This tends to get cases like this:

  X = cast ubyte to int
  Y = shr int X, ...

Tested by: shift.ll:test24


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21775 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-08 17:34:56 +00:00
Chris Lattner
4690010006 Refactor some code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21772 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-08 00:19:31 +00:00
Chris Lattner
cc8a2b98f2 Handle some simple cases where we can see that values get annihilated. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21771 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-08 00:08:33 +00:00
Chris Lattner
f4d4c87985 Fix a miscompilation of crafty by clobbering the "A" variable. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21770 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-07 23:49:08 +00:00
Chris Lattner
c0649ac931 Rewrite the guts of the reassociate pass to be more efficient and logical. Instead 
of trying to do local reassociation tweaks at each level, only process an expression
tree once (at its root).  This does not improve the reassociation pass in any real way.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21768 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-07 21:59:39 +00:00
Reid Spencer
789082af03 * Add two strlen optimizations: 
strlen(x) != 0 -> *x != 0
    strlen(x) == 0 -> *x == 0
* Change nested statistics to use style of other LLVM statistics so that
  only the name of the optimization (simplify-libcalls) is used as the
  statistic name, and the description indicates which specific all is
  optimized. Cuts down on some redundancy and saves a few bytes of space.
* Make note of stpcpy optimization that could be done.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21766 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-07 20:15:59 +00:00
Reid Spencer
673c1a9170 Don't increment the counter unless the debug flag is set. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21762 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-07 04:59:45 +00:00
Chris Lattner
0975ed5f4e Convert shifts to muls to assist reassociation. This implements 
Reassociate/shifttest.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21761 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-07 04:24:13 +00:00
Chris Lattner
08b43921e1 Simplify the code and rearrange it. No major functionality changes here. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21759 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-07 04:08:02 +00:00
Jeff Cohen
39cef60259 Silence VC++ warnings about unsafe mixing of ints and bools with the | operator. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21758 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-07 02:44:04 +00:00
Chris Lattner
3f6948d686 remove some dead (always dynamically false) flags 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21752 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 22:35:09 +00:00
Chris Lattner
dee199fe82 encode calling conventions for call/invoke instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21751 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 22:34:01 +00:00
Chris Lattner
479ffebd73 encode function calling convs in the bytecode file. invoke and call are 
still to come.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21749 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 20:42:57 +00:00
Chris Lattner
a8e8f16714 parse new calling conv specifiers 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21748 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 20:27:19 +00:00
Chris Lattner
28caccff30 wrap a longline 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21747 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 20:27:03 +00:00
Chris Lattner
d511898b58 add support for explicit calling conventions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21746 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 20:26:43 +00:00
Chris Lattner
f924a4c21f use splice instead of remove/insert for a minor speedup 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21743 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 19:58:35 +00:00
Chris Lattner
1f64025d88 remove some ugly hacks that are no longer needed since andrew removed the 
varargs munging code


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21742 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 19:49:51 +00:00
Chris Lattner
3799ed83b4 BAD typeo which caused many testsuite failures last night. Note to self, do 
not change code after testing it without retesting!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21741 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 17:13:16 +00:00
Chris Lattner
50a8a17e65 clean up the CBE output a bit 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21740 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 06:58:42 +00:00
Chris Lattner
fe673d9351 add tail marker as a comment 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21739 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 06:53:07 +00:00
Chris Lattner
a471e045b7 Make the stub functions be tail calls 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21738 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 06:48:54 +00:00
Chris Lattner
a9e9211bbb Preserve tail marker 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21737 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 06:48:21 +00:00
Chris Lattner
1b49141821 Implement Transforms/Inline/inline-tail.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21736 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 06:47:52 +00:00
Chris Lattner
1430ef134d preserve the tail marker 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21734 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 06:46:58 +00:00
Chris Lattner
c28ade4266 lex tail 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21729 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 06:20:33 +00:00
Chris Lattner
38287bdfde add bytecode reader support for tail calls 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21727 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 06:13:34 +00:00
Chris Lattner
ddb6db4fa1 Add a 'tail' marker for call instructions, patch contributed by 
Alexander Friedman.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21722 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 05:51:46 +00:00
Chris Lattner
19bdc03adc Wrap long lines 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21720 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 05:34:40 +00:00
Chris Lattner
ec710c5b12 DCE intrinsic instructions without side effects. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21719 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 05:27:34 +00:00
Chris Lattner
998fffdda1 These intrinsics do not access memory 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21718 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 05:21:04 +00:00
Chris Lattner
eabfa4787a Teach instcombine propagate zeroness through shl instructions, implementing 
and.ll:test31


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21717 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 04:53:20 +00:00
Chris Lattner
d7115b01a0 Implement shift.ll:test23. If we are shifting right then immediately truncating 
the result, turn signed shift rights into unsigned shift rights if possible.

This leads to later simplification and happens *often* in 176.gcc.  For example,
this testcase:

struct xxx { unsigned int code : 8; };
enum codes { A, B, C, D, E, F };
int foo(struct xxx *P) {
  if ((enum codes)P->code == A)
     bar();
}

used to be compiled to:

int %foo(%struct.xxx* %P) {
        %tmp.1 = getelementptr %struct.xxx* %P, int 0, uint 0           ; <uint*> [#uses=1]
        %tmp.2 = load uint* %tmp.1              ; <uint> [#uses=1]
        %tmp.3 = cast uint %tmp.2 to int                ; <int> [#uses=1]
        %tmp.4 = shl int %tmp.3, ubyte 24               ; <int> [#uses=1]
        %tmp.5 = shr int %tmp.4, ubyte 24               ; <int> [#uses=1]
        %tmp.6 = cast int %tmp.5 to sbyte               ; <sbyte> [#uses=1]
        %tmp.8 = seteq sbyte %tmp.6, 0          ; <bool> [#uses=1]
        br bool %tmp.8, label %then, label %UnifiedReturnBlock

Now it is compiled to:

        %tmp.1 = getelementptr %struct.xxx* %P, int 0, uint 0           ; <uint*> [#uses=1]
        %tmp.2 = load uint* %tmp.1              ; <uint> [#uses=1]
        %tmp.2 = cast uint %tmp.2 to sbyte              ; <sbyte> [#uses=1]
        %tmp.8 = seteq sbyte %tmp.2, 0          ; <bool> [#uses=1]
        br bool %tmp.8, label %then, label %UnifiedReturnBlock

which is the difference between this:

foo:
        subl $4, %esp
        movl 8(%esp), %eax
        movl (%eax), %eax
        shll $24, %eax
        sarl $24, %eax
        testb %al, %al
        jne .LBBfoo_2

and this:

foo:
        subl $4, %esp
        movl 8(%esp), %eax
        movl (%eax), %eax
        testb %al, %al
        jne .LBBfoo_2

This occurs 3243 times total in the External tests, 215x in povray,
6x in each f2c'd program, 1451x in 176.gcc, 7x in crafty, 20x in perl,
25x in gap, 3x in m88ksim, 25x in ijpeg.

Maybe this will cause a little jump on gcc tommorow :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21715 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 04:18:52 +00:00
Chris Lattner
7aed7ac5e1 Implement xor.ll:test22 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21713 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 02:07:39 +00:00
Chris Lattner
d152380ba8 implement and.ll:test30 and set.ll:test21 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21712 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 01:53:19 +00:00
Chris Lattner
828eeddb38 implement or.ll:test20 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21709 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-06 00:58:50 +00:00
Misha Brukman
d7a10c8566 * Order #includes alphabetically 
* Remove commented-out debug printouts


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21707 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-05 23:45:17 +00:00
Misha Brukman
f4f85998bf Remove extra blank line 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21706 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-05 23:43:47 +00:00
Misha Brukman
6b8a63ae58 Remove vim settings from source code; people should use llvm/utils/vim/vimrc 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21704 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-05 22:33:09 +00:00
Chris Lattner
9e60d8dbdc add support for undef values of opaque type, addressing PR541 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21701 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-05 22:21:19 +00:00
Chris Lattner
aba5ff5671 Add some extra checks. Opaque types don't have a null marker. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21700 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-05 20:57:00 +00:00
Chris Lattner
7ea0ade1b6 When hitting an unsupported intrinsic, actually print it 
Lower debug info to noops.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21698 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-05 17:55:17 +00:00
Andrew Lenharth
ded10bfb46 ctpop lowering in legalize 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21697 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-05 15:55:21 +00:00
Chris Lattner
3987abdfe3 Fix a bug compimling Ruby, fixing this testcase: 
LowerSetJmp/2005-05-05-OldUses.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21696 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-05 15:47:43 +00:00
Andrew Lenharth
b5884d3116 fix typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21693 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-04 19:25:37 +00:00
Andrew Lenharth
590091975c Well, add support for ct* for 21264 only. 
21164 is broken until expand works.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21692 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-04 19:12:09 +00:00
Andrew Lenharth
fecf095292 Make promoteOp work for CT* 
Proof?

ubyte %bar(ubyte %x) {
entry:
        %tmp.1 = call ubyte %llvm.ctlz( ubyte %x )
        ret ubyte %tmp.1
}

==>

zapnot $16,1,$0
CTLZ $0,$0
subq $0,56,$0
zapnot $0,1,$0
ret $31,($26),1


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21691 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-04 19:11:05 +00:00
Chris Lattner
693787a5ec Instcombine: cast (X != 0) to int, cast (X == 1) to int -> X iff X has only the low bit set. 
This implements set.ll:test20.

This triggers 2x on povray, 9x on mesa, 11x on gcc, 2x on crafty, 1x on eon,
6x on perlbmk and 11x on m88ksim.

It allows us to compile these two functions into the same code:

struct s { unsigned int bit : 1; };
unsigned foo(struct s *p) {
  if (p->bit)
    return 1;
  else
    return 0;
}
unsigned bar(struct s *p) { return p->bit; }


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21690 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-04 19:10:26 +00:00
Reid Spencer
cea6559f60 Implement the IsDigitOptimization for simplifying calls to the isdigit 
library function:
  isdigit(chr) -> 0 or 1 if chr is constant
  isdigit(chr) -> chr - '0' <= 9 otherwise

Although there are many calls to isdigit in llvm-test, most of them are
compiled away by macros leaving only this:

2 MultiSource/Applications/hexxagon


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21688 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-04 18:58:28 +00:00
Reid Spencer
58b563ce43 * Correct the function prototypes for some of the functions to match the 
actual spec (int -> uint)
* Add the ability to get/cache the strlen function prototype.
* Make sure generated values are appropriately named for debugging purposes
* Add the SPrintFOptimiation for 4 casts of sprintf optimization:
    sprintf(str,cstr) -> llvm.memcpy(str,cstr) (if cstr has no %)
    sprintf(str,"")   -> store sbyte 0, str
    sprintf(str,"%s",src) -> llvm.memcpy(str,src) (if src is constant)
    sprintf(str,"%c",chr) -> store chr, str   ; store sbyte 0, str+1

The sprintf optimization didn't fire as much as I had hoped:

  2 MultiSource/Applications/SPASS
  5 MultiSource/Benchmarks/McCat/18-imp
 22 MultiSource/Benchmarks/Prolangs-C/TimberWolfMC
  1 MultiSource/Benchmarks/Prolangs-C/assembler
  6 MultiSource/Benchmarks/Prolangs-C/unix-smail
  2 MultiSource/Benchmarks/mediabench/mpeg2/mpeg2dec


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21679 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-04 03:20:21 +00:00
Andrew Lenharth
691ef2ba06 Implement count leading zeros (ctlz), count trailing zeros (cttz), and count 
population (ctpop).  Generic lowering is implemented, however only promotion
is implemented for SelectionDAG at the moment.

More coming soon.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21676 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-03 17:19:30 +00:00
Chris Lattner
f818cfe096 fix a bug in the 1 index GEP handling code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21670 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-03 16:44:45 +00:00
Reid Spencer
21506ff821 Implement optimizations for the strchr and llvm.memset library calls. 
Neither of these activated as many times as was hoped:

strchr:
9 MultiSource/Applications/siod
1 MultiSource/Applications/d
2 MultiSource/Prolangs-C/archie-client
1 External/SPEC/CINT2000/176.gcc/176.gcc

llvm.memset:
no hits


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21669 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-03 07:23:44 +00:00
Chris Lattner
38bacf29e8 add direct support for making GEP instrs with one index 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21665 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-03 05:43:30 +00:00
Jeff Cohen
a97e8db835 Use ANSI-approved way of getting the value infinity (otherwise VC++ won't compile it) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21662 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-03 03:13:01 +00:00
Reid Spencer
9974ddab2b Avoid garbage output in the statistics display by ensuring that the 
strings passed to Statistic's constructor are not destructable. The stats
are printed during static destruction and the SimplifyLibCalls module was
getting destructed before the statistics.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21661 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-03 02:54:54 +00:00
Reid Spencer
e6ec8cc8c6 Add the StrNCmpOptimization which is similar to strcmp. 
Unfortunately, this optimization didn't trigger on any llvm-test tests.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21660 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-03 01:43:45 +00:00
Reid Spencer
a1b4390938 Implement the fprintf optimization which converts calls like this: 
fprintf(F,"hello") -> fwrite("hello",strlen("hello"),1,F)
  fprintf(F,"%s","hello") -> fwrite("hello",strlen("hello"),1,F)
  fprintf(F,"%c",'x') -> fputc('c',F)

This optimization fires severals times in llvm-test:

313 MultiSource/Applications/Burg
302 MultiSource/Benchmarks/Prolangs-C/TimberWolfMC
189 MultiSource/Benchmarks/Prolangs-C/mybison
175 MultiSource/Benchmarks/Prolangs-C/football
130 MultiSource/Benchmarks/Prolangs-C/unix-tbl


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21657 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-02 23:59:26 +00:00
Andrew Lenharth
8b9e3e6511 fold fp div by 0 to inf, the way gcc does. This is legal according to the FP spec 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21655 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-02 21:25:47 +00:00
Andrew Lenharth
abc73b3e5d Remove support for 1.0 style varargs 
amusing of course, because we will have to go back to those semantics soon


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21654 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-02 19:07:27 +00:00
John Criswell
fe3706a12b Fixed a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21653 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-02 14:47:42 +00:00
Duraid Madina
40c9e6be3e support multiplication by constant negative integers 
this constmul code is still buggy though, so beware. mul by 7427 is currently
broken, for example. will fix it when I get a moment :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21652 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-02 07:27:14 +00:00
Duraid Madina
4bd708d8a6 add support for bools to SELECT, this fixes Prolangs-C/bison from the 
testsuite, however 09-vor is still dead (hopefully for other reasons!)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21651 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-02 06:41:13 +00:00
Chris Lattner
9fb25db11e Implement getelementptr.ll:test11 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21647 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-01 04:42:15 +00:00
Chris Lattner
37366c1ba8 Check for volatile loads only once. 
Implement load.ll:test7


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21645 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-01 04:24:53 +00:00
Tanya Lattner
874abe50ac SMS for superblocks. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21643 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-01 01:27:47 +00:00
Tanya Lattner
be2b84aa9e Added extra constructor for superblocks. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21642 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-01 01:25:53 +00:00
Tanya Lattner
c50156360a Fixed bug in searchPath function for finding nodes between two recurrences. 
Changed dependence analyzer to only use dep distances of 2 or less.
This is experimental.

Changed MSchedGraph to be able to represent more then one BB (first steps).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21641 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-30 23:07:59 +00:00
Andrew Lenharth
50d91d71a5 I was sure I had thought about this and there was a reason it should work. 
But it is entirely possible I am just crazy.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21640 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-30 14:19:13 +00:00
Alkis Evlogimenos
b1beff0f0d Do not use deprecated APIs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21639 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-30 07:13:31 +00:00
Reid Spencer
63a7513ac1 Fix a comment that stated the wrong thing. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21638 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-30 06:45:47 +00:00
Chris Lattner
9c9183aef4 Eliminate some random whitespace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21637 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-30 04:44:07 +00:00
Chris Lattner
f76e7dc8d8 Codegen and legalize sin/cos/llvm.sqrt as FSIN/FCOS/FSQRT calls. This patch 
was contributed by Morten Ofstad, with some minor tweaks and bug fixes added
by me.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21636 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-30 04:43:14 +00:00
Chris Lattner
08cae7f519 Doesn't support these nodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21634 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-30 04:26:56 +00:00
Chris Lattner
17234b7d78 This target doesn't support the FSIN/FCOS/FSQRT nodes yet 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21633 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-30 04:26:06 +00:00
Chris Lattner
c5dcb53bea Add support for FSIN/FCOS when unsafe math ops are enabled. Patch contributed by 
Morten Ofstad!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21632 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-30 04:25:35 +00:00
Chris Lattner
5434b429c8 Add support for llvm.sqrt and sin/cos if unsafe math optimizations are enabled. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21631 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-30 04:12:40 +00:00
Chris Lattner
34f74a6162 Expose an option allowing unsafe math optimizations. Patch contributed by 
Morten Ofstad!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21630 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-30 04:09:52 +00:00
Chris Lattner
b42a9ffbe9 Lower llvm.sqrt -> fsqrt/sqrt 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21629 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-30 04:07:50 +00:00
Chris Lattner
eed37bad01 Add llvm.sqrt intrinsic, patch contributed by Morten Ofstad 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21627 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-30 03:44:07 +00:00
Reid Spencer
9f56b1feeb * Don't depend on "guessing" what a FILE* is, just require that the actual 
type be obtained from a CallInst we're optimizing.
* Make it possible for getConstantStringLength to return the ConstantArray
  that it extracts in case the content is needed by an Optimization.
* Implement the strcmp optimization
* Implement the toascii optimization

This pass is now firing several to many times in the following MultiSource
tests:

Applications/Burg      -   7 (strcat,strcpy)
Applications/siod      -  13 (strcat,strcpy,strlen)
Applications/spiff     - 120 (exit,fputs,strcat,strcpy,strlen)
Applications/treecc    -  66 (exit,fputs,strcat,strcpy)
Applications/kimwitu++ -  34 (strcmp,strcpy,strlen)
Applications/SPASS     - 588 (exit,fputs,strcat,strcpy,strlen)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21626 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-30 03:17:54 +00:00
Reid Spencer
ff5525daf3 Implement the optimizations for "pow" and "fputs" library calls. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21618 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-29 09:39:47 +00:00
Reid Spencer
df4945bcb5 Remove optimizations that don't require both operands to be constant. These 
are moved to simplify-libcalls pass.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21614 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-29 05:55:35 +00:00
Jeff Cohen
5882b92360 Consistently use 'class' to silence VC++ 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21612 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-29 03:05:44 +00:00
Reid Spencer
1d3b71846b * Add constant folding for additional floating point library calls such as 
sinh, cosh, etc.
* Make the name comparisons for the fp libcalls a little more efficient by
  switching on the first character of the name before doing comparisons.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21611 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-28 23:01:59 +00:00
Chris Lattner
2c56e8a23e Add support for FSQRT node, patch contributed by Morten Ofstad 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21610 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-28 22:07:18 +00:00
Chris Lattner
5b103c20e3 These functions can set errno! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21609 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-28 21:52:31 +00:00
Chris Lattner
5afc124bdf Add some new X86 instrs, patch contributed by Morten Ofstad 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21608 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-28 21:50:05 +00:00
Chris Lattner
3b6b63711e Codegen fabs/fabsf as FABS. Patch contributed by Morten Ofstad 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21607 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-28 21:48:42 +00:00
Chris Lattner
da6ba87d23 Legalize FSQRT, FSIN, FCOS nodes, patch contributed by Morten Ofstad 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21606 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-28 21:44:33 +00:00
Chris Lattner
7f64464ff1 Add FSQRT, FSIN, FCOS nodes, patch contributed by Morten Ofstad 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21605 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-28 21:44:03 +00:00
Reid Spencer
5624c75f9f Remove from the TODO list those optimizations that are already handled by 
constant folding implemented in lib/Transforms/Utils/Local.cpp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21604 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-28 18:05:16 +00:00
Reid Spencer
8441a01146 Document additional libcall transformations that need to be written. 
Help Wanted!

There's a lot of them to write.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21603 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-28 04:40:06 +00:00
Reid Spencer
716f49e5a2 Doxygenate. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21602 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-27 21:29:20 +00:00
Chris Lattner
209a0aea22 remove 'statement with no effect' warning 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21600 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-27 20:12:17 +00:00
Andrew Lenharth
2d86ea21dd Implement Value* tracking for loads and stores in the selection DAG. This enables one to use alias analysis in the backends. 
(TRUNK)Stores and (EXT|ZEXT|SEXT)Loads have an extra SDOperand which is a SrcValueSDNode which contains the Value*.  Note that if the operation is introduced by the backend, it will still have the operand, but the value* will be null.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21599 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-27 20:10:01 +00:00
Chris Lattner
22cab6c752 Unbreak the sparc backend. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21598 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-27 18:57:15 +00:00
Reid Spencer
3f7d8c65bb More Cleanup: 
* Name the instructions by appending to name of original
* Factor common part out of a switch statement.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21597 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-27 17:46:54 +00:00
Duraid Madina
85d5f6067d clean up some warnings 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21590 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-27 11:57:39 +00:00
Reid Spencer
a16d5a5185 This is a cleanup commit: 
* Correct stale documentation in a few places
* Re-order the file to better associate things and reduce line count
* Make the pass thread safe by caching the Function* objects needed by the
  optimizers in the pass object instead of globally.
* Provide the SimplifyLibCalls pass object to the optimizer classes so they
  can access cached Function* objects and TargetData info
* Make sure the pass resets its cache if the Module passed to runOnModule
  changes
* Rename CallOptimizer LibCallOptimization. All the classes are named
  *Optimization while the objects are *Optimizer.
* Don't cache Function* in the optimizer objects because they could be used
  by multiple PassManager's running in multiple threads
* Add an optimization for strcpy which is similar to strcat
* Add a "TODO" list at the end of the file for ideas on additional libcall
  optimizations that could be added (get ideas from other compilers).

Sorry for the huge diff. Its mostly reorganization of code. That won't
happen again as I believe the design and infrastructure for this pass is
now done or close to it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21589 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-27 07:54:40 +00:00
Chris Lattner
d651f441ae detect functions that never return, and turn the instruction following a 
call to them into an 'unreachable' instruction.

This triggers a bunch of times, particularly on gcc:

gzip: 36
gcc: 601
eon: 12
bzip: 38


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21587 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-27 04:52:23 +00:00
Reid Spencer
026a87a868 Prefix the debug statistics so they group together. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21583 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-27 00:20:23 +00:00
Reid Spencer
1ea099c5fd In debug builds, make a statistic for each kind of call optimization. This 
helps track down what gets triggered in the pass so its easier to identify
good test cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21582 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-27 00:05:45 +00:00
Chris Lattner
bc9fa589ef This analysis doesn't take 'throwing' into consideration, it looks at 
'unwinding'


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21581 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 23:53:25 +00:00
Reid Spencer
0ddf0d6bec Fix up the debug statement to actually use a newline .. radical concept. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21580 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 23:07:08 +00:00
Reid Spencer
ef99ea318e Uh, this isn't argpromotion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21579 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 23:05:17 +00:00
Reid Spencer
8f13261863 Add some debugging output so we can tell which calls are getting triggered 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21578 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 23:02:16 +00:00
Reid Spencer
47a3785062 No, seriously folks, memcpy really does return void. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21575 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 22:49:48 +00:00
Reid Spencer
a525f6d8f5 memcpy returns void!!!!! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21574 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 22:46:23 +00:00
Chris Lattner
3f80a38859 don't let Reid build void*'s :) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21571 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 20:03:33 +00:00
Reid Spencer
43fd4d077f Fix some bugs found by running on llvm-test: 
* MemCpyOptimization can only be optimized if the 3rd and 4th arguments are
  constants and we weren't checking for that.
* The result of llvm.memcpy (and llvm.memmove) is void* not sbyte*, put in
  a cast.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21570 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 19:55:57 +00:00
Reid Spencer
fcbdb9c85b Changes From Review Feedback: 
* Have the SimplifyLibCalls pass acquire the TargetData and pass it down to
  the optimization classes so they can use it to make better choices for
  the signatures of functions, etc.
* Rearrange the code a little so the utility functions are closer to their
  usage and keep the core of the pass near the top of the files.
* Adjust the StrLen pass to get/use the correct prototype depending on the
  TargetData::getIntPtrType() result. The result of strlen is size_t which
  could be either uint or ulong depending on the platform.
* Clean up some coding nits (cast vs. dyn_cast, remove redundant items from
  a switch, etc.)
* Implement the MemMoveOptimization as a twin of MemCpyOptimization (they
  only differ in name).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21569 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 19:13:17 +00:00
Chris Lattner
318c149823 Make interval partition print correctly, patch contributed by 
Vladimir Prus!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21566 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 14:48:28 +00:00
Chris Lattner
93b94a6ccf Fix the compile failures from last night. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21565 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 14:40:41 +00:00
Duraid Madina
4706c0395b constmul bugfix: multiply by 27611 was broken 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21564 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 09:42:50 +00:00
Duraid Madina
3b84bac3ef clean up the code! (oops) lots more cleaning left, however. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21563 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 08:43:47 +00:00
Reid Spencer
20754ac069 * Merge get_GVInitializer and getCharArrayLength into a single function 
named getConstantStringLength. This is the common part of StrCpy and
  StrLen optimizations and probably several others, yet to be written. It
  performs all the validity checks for looking at constant arrays that are
  supposed to be null-terminated strings and then computes the actual
  length of the string.
* Implement the MemCpyOptimization class. This just turns memcpy of 1, 2, 4
  and 8 byte data blocks that are properly aligned on those boundaries into
  a load and a store. Much more could be done here but alignment
  restrictions and lack of knowledge of the target instruction set prevent
  use from doing significantly more. That will have to be delegated to the
  code generators as they lower llvm.memcpy calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21562 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 07:45:18 +00:00
Duraid Madina
b2322561cb * Add code to reduce multiplies by constant integers to shifts, adds and 
subtracts. This is a very rough and nasty implementation of Lefevre's
  "pattern finding" algorithm. With a few small changes though, it should
  end up beating most other methods in common use, regardless of the size
  of the constant (currently, it's often one or two shifts worse)

  TODO: rewrite it so it's not hideously ugly (this is a translation from
        perl, which doesn't help ;)
        bypass most of it for multiplies by 2^n+1
	(eventually) teach it that some combinations of shift+add are
	cheaper than others (e.g. shladd on ia64, scaled adds on alpha)
	get it to try multiple booth encodings in search of the cheapest
	routine
	make it work for negative constants

  This is hacked up as a DAG->DAG transform, so once I clean it up I hope
  it'll be pulled out of here and put somewhere else. The only thing backends
  should really have to worry about for now is where to draw the line
  between using this code vs. going ahead and doing an integer multiply
  anyway.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21560 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 07:23:02 +00:00
Reid Spencer
912401c3f6 * Implement StrLenOptimization 
* Factor out commonalities between StrLenOptimization and StrCatOptimization
* Make sure that signatures return sbyte* not void*


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21559 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 05:24:00 +00:00
Reid Spencer
43e0baece3 Incorporate feedback from Chris: 
* Change signatures of OptimizeCall and ValidateCalledFunction so they are
  non-const, allowing the optimization object to be modified. This is in
  support of caching things used across multiple calls.
* Provide two functions for constructing and caching function types
* Modify the StrCatOptimization to cache Function objects for strlen and
  llvm.memcpy so it doesn't regenerate them on each call site. Make sure
  these are invalidated each time we start the pass.
* Handle both a GEP Instruction and a GEP ConstantExpr
* Add additional checks to make sure we really are dealing with an arary of
  sbyte and that all the element initializers are ConstantInt or
  ConstantExpr that reduce to ConstantInt.
* Make sure the GlobalVariable is constant!
* Don't use ConstantArray::getString as it can fail and it doesn't give us
  the right thing. We must check for null bytes in the middle of the array.
* Use llvm.memcpy instead of memcpy so we can factor alignment into it.
* Don't use void* types in signatures, replace with sbyte* instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21555 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 03:26:15 +00:00
Chris Lattner
d36f979085 Fold (X > -1) | (Y > -1) --> (X&Y > -1) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21552 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 01:18:33 +00:00
Reid Spencer
855adb1ac4 Changes due to code review and new implementation: 
* Don't use std::string for the function names, const char* will suffice
* Allow each CallOptimizer to validate the function signature before
  doing anything
* Repeatedly loop over the functions until an iteration produces
  no more optimizations. This allows one optimization to insert a
  call that is optimized by another optimization.
* Implement the ConstantArray portion of the StrCatOptimization
* Provide a template for the MemCpyOptimization
* Make ExitInMainOptimization split the block, not delete everything
  after the return instruction.
(This covers revision 1.3 and 1.4, as the 1.3 comments were botched)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21548 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-25 21:20:38 +00:00
Chris Lattner
229ab2e7b2 implement some more logical compares with constants, so that: 
int foo1(int x, int y) {
  int t1 = x >= 0;
  int t2 = y >= 0;
  return t1 & t2;
}
int foo2(int x, int y) {
  int t1 = x == -1;
  int t2 = y == -1;
  return t1 & t2;
}

produces:

_foo1:
        or r2, r4, r3
        srwi r2, r2, 31
        xori r3, r2, 1
        blr
_foo2:
        and r2, r4, r3
        addic r2, r2, 1
        li r2, 0
        addze r3, r2
        blr

instead of:

_foo1:
        srwi r2, r4, 31
        xori r2, r2, 1
        srwi r3, r3, 31
        xori r3, r3, 1
        and r3, r2, r3
        blr
_foo2:
        addic r2, r4, 1
        li r2, 0
        addze r2, r2
        addic r3, r3, 1
        li r3, 0
        addze r3, r3
        and r3, r2, r3
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21547 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-25 21:20:28 +00:00
Reid Spencer
6cc0311c6d Lots of changes based on review and new functionality: 
* Use a 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21546 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-25 21:11:48 +00:00
Chris Lattner
6ea9279304 Codegen x < 0 | y < 0 as (x|y) < 0. This allows us to compile this to: 
_foo:
        or r2, r4, r3
        srwi r3, r2, 31
        blr

instead of:

_foo:
        srwi r2, r4, 31
        srwi r3, r3, 31
        or r3, r2, r3
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21544 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-25 21:03:25 +00:00
Chris Lattner
91bd25d9df Make dominates(A,B) work with post dominators. Patch contributed by 
Naveen Neelakantam, thanks!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21543 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-25 20:50:33 +00:00
Chris Lattner
a70b66d49e implement getelementptr.ll:test10 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21541 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-25 20:17:30 +00:00
Chris Lattner
a1198b5254 Correctly handle global-argument aliases induced in main 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21537 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-25 19:16:31 +00:00
Chris Lattner
63320cc841 Don't mess up SCC traversal when a node has null edges out of it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21536 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-25 19:16:17 +00:00
Reid Spencer
b7c11e3966 Post-Review Cleanup: 
* Fix comments at top of file
* Change algorithm for running the call optimizations from n*n to something
  closer to n.
* Use a hash_map to store and lookup the optimizations since there will
  eventually (or potentially) be a large number of them. This gets lookup
  based on the name of the function to O(1). Each CallOptimizer now has a
  std::string member named func_name that tracks the name of the function
  that it applies to. It is this string that is entered into the hash_map
  for fast comparison against the function names encountered in the module.
* Cleanup some style issues pertaining to iterator invalidation
* Don't pass the Function pointer to the OptimizeCall function because if
  the optimization needs it, it can get it from the CallInst passed in.
* Add the skeleton for a new CallOptimizer, StrCatOptimizer which will
  eventually replace strcat's of constant strings with direct copies.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21526 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-25 03:59:26 +00:00
Reid Spencer
a1aad3b0ed Shut GCC 4.0 up about classes that have virtual functions but a non-virtual 
destructor. Just add the do-nothing virtual destructor.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21524 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-25 02:55:55 +00:00
Reid Spencer
a7c049bf6a A new pass to provide specific optimizations for certain well-known library 
calls. The pass visits all external functions in the module and determines
if such function calls can be optimized. The optimizations are specific to
the library calls involved. This initial version only optimizes calls to
exit(3) when they occur in main(): it changes them to ret instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21522 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-25 02:53:12 +00:00
Reid Spencer
e8f3848639 Older compilers won't like the inline virtual destructor in the header file 
so we put the destructor in Pass.cpp and make it non-inline.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21520 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-25 01:01:35 +00:00
Reid Spencer
2b2a528374 Shut GCC 4.0 up about classes with virtual functions but no virtual 
destructor.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21510 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-24 22:27:20 +00:00
Chris Lattner
f52d681657 Eliminate cases where we could << by 64, which is undefined in C. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21500 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-24 17:46:05 +00:00
Chris Lattner
a1df33c0ee Implement xor.ll:test21: select (not C), A, B -> select C, B, A 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21495 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-24 07:30:14 +00:00
Chris Lattner
64001d0a13 Allow these methods to take a generic Value* to simplify clients. Use 
const_cast instead of c casts.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21493 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-24 07:28:37 +00:00
Chris Lattner
484d3cf0e3 Use getPrimitiveSizeInBits() instead of getPrimitiveSize()*8 
Completely rework the 'setcc (cast x to larger), y' code.  This code has
the advantage of implementing setcc.ll:test19 (being more general than
the previous code) and being correct in all cases.

This allows us to unxfail 2004-11-27-SetCCForCastLargerAndConstant.ll,
and close PR454.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21491 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-24 06:59:08 +00:00
Chris Lattner
ea1049139e Fix a bug in my previous checkin 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21485 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-23 22:01:39 +00:00
Chris Lattner
4f0247c10d Add a method, remove last use of Type.def 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21483 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-23 22:00:09 +00:00
Jeff Cohen
9d80930e95 Eliminate tabs and trailing spaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21480 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-23 21:38:35 +00:00
Chris Lattner
cc1f24585e Propagate eq sets through the bu graphs to the cbu and eq graphs, fixing 
a crash of the sfv on 188.ammp


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21478 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-23 21:11:05 +00:00
Chris Lattner
6970b661cb Generalize the setcc -> PHI and Select folding optimizations to work with 
any constant RHS, not just a constant integer RHS.  This implements
select.ll:test17


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21470 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-23 15:31:55 +00:00
Misha Brukman
dca7978d1d * Order #includes as per style guide 
* Combine multiple ``std::cerr <<'' statements into one for simplicity


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21458 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-22 19:13:22 +00:00
Misha Brukman
27177f8c16 Convert tabs to spaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21457 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-22 18:06:01 +00:00
Alkis Evlogimenos
38da41cc44 Silence gcc-4.0.0 warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21453 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-22 17:56:01 +00:00
Misha Brukman
7847fcac17 Convert tabs to spaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21452 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-22 17:54:37 +00:00
Reid Spencer
18969fbc9f Implement the --enable-targets= feature of the configure script. The make 
variable TARGETS_TO_BUILD is used to determine which targets in lib/Target
are built and which libraries are linked into llc. This effectively
implements the feature. One item remains: disabling targets in the dejagnu
test suite.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21450 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-22 17:20:11 +00:00
Andrew Lenharth
500b4dba32 keep track of max depth stats 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21446 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-22 13:35:18 +00:00
Tanya Lattner
9f83822565 Updated dependence analyzer. Fixed numerous bugs. Same stage scheduling, etc. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21444 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-22 06:32:48 +00:00
Chris Lattner
3fe4d3cb5b Malloc/Free have mod/ref effects. Do not allow CSE of function calls that 
call malloc/free.  This fixes PR555.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21443 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-22 05:36:59 +00:00
Misha Brukman
3c94497ec7 Convert tabs to spaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21440 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-22 04:08:30 +00:00
Misha Brukman
dedf2bd5a3 Convert tabs to spaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21439 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-22 04:01:18 +00:00
Misha Brukman
fd93908ae8 Remove trailing whitespace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21427 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 23:48:37 +00:00
Misha Brukman
0e0a7a45d3 * Remove trailing whitespace 
* Convert tabs to spaces


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21426 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 23:38:14 +00:00
Misha Brukman
b5f662fa03 Remove trailing whitespace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21425 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 23:30:14 +00:00
Misha Brukman
4633f1cde8 Remove trailing whitespace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21424 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 23:13:11 +00:00
Misha Brukman
f976c856fc Remove trailing whitespace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21422 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 22:55:34 +00:00
Misha Brukman
d1c881a8d4 * Remove trailing whitespace 
* Convert tabs to spaces


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21421 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 22:43:08 +00:00
Misha Brukman
edf128a7fa Remove trailing whitespace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21420 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 22:36:52 +00:00
Misha Brukman
23c6d2cb79 * Remove trailing whitespace 
* Convert tabs to spaces


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21418 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 21:48:46 +00:00
Misha Brukman
8a96c53d36 Remove trailing whitespace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21417 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 21:44:41 +00:00
Misha Brukman
2b37d7cf28 Remove trailing whitespace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21416 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 21:13:18 +00:00
Misha Brukman
019b63931b * Remove trailing whitespace 
* Convert tabs to spaces


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21415 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 21:10:11 +00:00
Chris Lattner
837a521c48 Match another form of eqv 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21413 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 21:09:11 +00:00
Chris Lattner
109026290b Handle stores of global address as stores of immediates. Instead of: 
test1:
        movl $N, %eax
        movl %eax, G
        ret

emit:

test1:
        movl $N, G
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21407 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 19:11:03 +00:00
Chris Lattner
75f354bd7a Handle (store &GV -> mem) as a store immediate. This often occurs for 
printf format strings and other stuff.  Instead of generating this:

        movl $l1__2E_str_1, %eax
        movl %eax, (%esp)

we now emit:

        movl $l1__2E_str_1, (%esp)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21406 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 19:03:24 +00:00
Reid Spencer
8e827e8661 Use the actual uid/gid for defaulting the fields in the archive. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21405 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 17:49:57 +00:00
Chris Lattner
cb2d1a2dc2 Fix a bug where we would not promote calls to invokes if they occured in 
the same block as the setjmp.  Thanks to Greg Pettyjohn for noticing this!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21403 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 16:46:46 +00:00
Reid Spencer
3468e57f64 Eliminate calls to system dependent function getuid by using 
the newly implemented sys::Process::GetCurrentUserId function. Replace
similarly for getgid.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21402 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 16:15:19 +00:00
Reid Spencer
93b3473478 Provide an implementation of the GetCurrentUserId and GetCurrentGroupId 
methods that were recently added to the interface.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21401 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 16:12:57 +00:00
Chris Lattner
a5ed1bd00b add support for taking and resolving the address of free. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21396 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 16:09:43 +00:00
Chris Lattner
566f600779 Improve doxygen, from part of Evan's patch that didn't apply. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21394 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 16:06:03 +00:00
Chris Lattner
0f67dd6237 Improve doxygen documentation, patch contributed by Evan Jones! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21393 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 16:04:49 +00:00
Chris Lattner
588bbbffa1 Improve and elimination. On PPC, for: 
bool %test(int %X) {
        %Y = and int %X, 8
        %Z = setne int %Y, 0
        ret bool %Z
}

we now generate this:

        rlwinm r2, r3, 0, 28, 28
        srwi r3, r2, 3

instead of this:

        rlwinm r2, r3, 0, 28, 28
        srwi r2, r2, 3
        rlwinm r3, r2, 0, 31, 31

I'll leave it to Nate to get it down to one instruction. :)

---------------------------------------------------------------------


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21391 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 06:28:15 +00:00
Chris Lattner
1c2a9b95dc Fold (x & 8) != 0 and (x & 8) == 8 into (x & 8) >> 3. 
This turns this PPC code:

        rlwinm r2, r3, 0, 28, 28
        cmpwi cr7, r2, 8
        mfcr r2
        rlwinm r3, r2, 31, 31, 31

into this:

        rlwinm r2, r3, 0, 28, 28
        srwi r2, r2, 3
        rlwinm r3, r2, 0, 31, 31

Next up, nuking the extra and.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21390 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 06:12:41 +00:00
Chris Lattner
956db27a63 Instcombine this: 
%shortcirc_val = select bool %tmp.1, bool true, bool %tmp.4             ; <bool> [#uses=1]
        %tmp.6 = cast bool %shortcirc_val to int                ; <int> [#uses=1]

into this:

        %shortcirc_val = or bool %tmp.1, %tmp.4         ; <bool> [#uses=1]
        %tmp.6 = cast bool %shortcirc_val to int                ; <int> [#uses=1]

not this:

        %tmp.4.cast = cast bool %tmp.4 to int           ; <int> [#uses=1]
        %tmp.6 = select bool %tmp.1, int 1, int %tmp.4.cast             ; <int> [#uses=1]


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21389 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 05:43:13 +00:00
Chris Lattner
bf5d4fb7d8 Teach simplifycfg that setcc is cheap and non-trapping, so that it can 
convert this:

        %tmp.1 = seteq int %i, 0                ; <bool> [#uses=1]
        br bool %tmp.1, label %shortcirc_done, label %shortcirc_next

shortcirc_next:         ; preds = %entry
        %tmp.4 = seteq int %j, 0                ; <bool> [#uses=1]
        br label %shortcirc_done

shortcirc_done:         ; preds = %shortcirc_next, %entry
        %shortcirc_val = phi bool [ %tmp.4, %shortcirc_next ], [ true, %entry ]         ; <bool> [#uses=1]

to this:
        %tmp.1 = seteq int %i, 0                ; <bool> [#uses=1]
        %tmp.4 = seteq int %j, 0                ; <bool> [#uses=1]
        %shortcirc_val = select bool %tmp.1, bool true, bool %tmp.4             ; <bool> [#uses=1]

... which is later simplified by instcombine into an or.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21388 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 05:31:13 +00:00
Reid Spencer
2aafadcc76 For Bug 543: 
Standardize the error messages to be in "path: what failed: why" format.
Also attempt to use the correct errno to ThrowErrno in situations where
the errno value is erased by subsequent system calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21385 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 02:50:10 +00:00
Reid Spencer
03aee2e3f2 For Bug 543: 
Allow the ThrowErrno function to optionally accept an error number
parameter so that callers can specify the error number to be used.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21384 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 02:30:32 +00:00
Misha Brukman
d6a29a5304 Remove trailing whitespace, patch by Markus Oberhumer. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21379 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-20 16:05:03 +00:00
Misha Brukman
22c46da12b Add FIXME by Markus Oberhumer from bug 545: not checking for "." in $PATH may 
result in returning executable files that won't be runnable.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21378 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-20 15:42:11 +00:00
Misha Brukman
8177bf8904 Do not mark directories as `executable', we only want program files 
Patch by Markus Oberhumer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21377 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-20 15:33:22 +00:00
Misha Brukman
4619c75f64 Ignore dangling symlinks in getDirectoryContents() 
Thanks to Markus Oberhumer for the patch!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21370 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-20 04:04:07 +00:00
Misha Brukman
4b2afe6394 Initialize fields mode, uid, and gid. 
Patch by Markus Oberhumer.  Thanks!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21369 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-20 03:55:35 +00:00
Misha Brukman
72a9caa260 Align comments together for consistency 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21368 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-20 03:52:59 +00:00
Chris Lattner
7d27fc0252 Wrap some long lines. 
Make IPSCCP strip off dead constant exprs that are using functions, making
them appear as though their address is taken.  This allows us to propagate
some more pool descriptors, lowering the overhead of pool alloc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21363 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-19 19:16:19 +00:00
Chris Lattner
20b463629b fix PR549 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21360 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-19 15:27:29 +00:00
Chris Lattner
240d6f4c9d Eliminate a broken transformation, fixing PR548 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21354 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-19 06:04:18 +00:00
Chris Lattner
f577c6122f Add completely untested support for mtcrf/mfcrf encoding 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21353 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-19 05:41:52 +00:00
Chris Lattner
14522e31d9 switch over the rest of the formats that use RC to use isDOT 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21352 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-19 05:21:30 +00:00
Chris Lattner
883059fb58 Convert the XForm instrs and XSForm instruction over to use isDOT 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21351 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-19 05:15:18 +00:00
Chris Lattner
97a2d42999 Now that the ppc64 and vmx operands of I are always 0, forward substitute 
them away.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21350 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-19 05:05:22 +00:00
Chris Lattner
a611ab72ca convert over bform and iform instructions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21349 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-19 05:00:59 +00:00
Chris Lattner
57226fbc7b Convert over DForm and DSForm instructions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21348 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-19 04:59:28 +00:00
Chris Lattner
e19d0b1130 Convert XLForm and XForm instructions over to use PPC64 when appropriate. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21347 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-19 04:51:30 +00:00
Chris Lattner
5035cef732 Convert XO XS and XFX forms to use isPPC64 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21346 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-19 04:40:07 +00:00
Chris Lattner
0bdc6f1fd4 Turn PPC64 and VMX into classes that can be added to instructions instead of 
bits that must be passed up the inheritance hierarchy.  Convert MForm and AForm
instructions over


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21345 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-19 04:32:54 +00:00
Nate Begeman
1cbf3abbb8 Next round of PPC CR optimizations. For the following code: 
int %bar(float %a, float %b, float %c, float %d) {
entry:
    %tmp.1 = setlt float %a, %d
    %tmp.2 = setlt float %b, %d
    %or = or bool %tmp.1, %tmp.2
    %tmp.3 = setgt float %c, %d
    %tmp.4 = or bool %or, %tmp.3
    %tmp.5 = and bool %tmp.4, true
    %retval = cast bool %tmp.5 to int
    ret int %retval
}

We now emit:

_bar:
.LBB_bar_0:     ; entry
        fcmpu cr0, f1, f4
        fcmpu cr1, f2, f4
        cror 0, 0, 4
        fcmpu cr1, f3, f4
        cror 28, 0, 5
        mfcr r2
        rlwinm r3, r2, 29, 31, 31
        blr

Instead of:

_bar:
.LBB_bar_0:     ; entry
        fcmpu cr7, f1, f4
        mfcr r2
        rlwinm r2, r2, 29, 31, 31
        fcmpu cr7, f2, f4
        mfcr r3
        rlwinm r3, r3, 29, 31, 31
        or r2, r2, r3
        fcmpu cr7, f3, f4
        mfcr r3
        rlwinm r3, r3, 30, 31, 31
        or r3, r2, r3
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21321 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-18 07:48:09 +00:00
Chris Lattner
ea96b5edbb silence a bogus warning 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21320 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-18 05:26:21 +00:00
Chris Lattner
fda2b55e1b Fold setcc of MVT::i1 operands into logical operations 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21319 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-18 04:48:12 +00:00
Chris Lattner
4a44c8df19 Another minor simplification: handle setcc (zero_extend x), c -> setcc(x, c') 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21318 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-18 04:30:45 +00:00
Chris Lattner
7467c9b086 Another simple xform 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21317 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-18 04:11:19 +00:00
Chris Lattner
706aa9685a Fold: 
// (X != 0) | (Y != 0) -> (X|Y != 0)
        // (X == 0) & (Y == 0) -> (X|Y == 0)

Compiling this:

int %bar(int %a, int %b) {
        entry:
        %tmp.1 = setne int %a, 0
        %tmp.2 = setne int %b, 0
        %tmp.3 = or bool %tmp.1, %tmp.2
        %retval = cast bool %tmp.3 to int
        ret int %retval
        }

to this:

_bar:
        or r2, r3, r4
        addic r3, r2, -1
        subfe r3, r3, r2
        blr

instead of:

_bar:
        addic r2, r3, -1
        subfe r2, r2, r3
        addic r3, r4, -1
        subfe r3, r3, r4
        or r3, r2, r3
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21316 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-18 03:59:53 +00:00
Chris Lattner
36019aa5c6 Make the AND elimination operation recursive and significantly more powerful, 
eliminating an and for Nate's testcase:

int %bar(int %a, int %b) {
        entry:
        %tmp.1 = setne int %a, 0
        %tmp.2 = setne int %b, 0
        %tmp.3 = or bool %tmp.1, %tmp.2
        %retval = cast bool %tmp.3 to int
        ret int %retval
        }

generating:

_bar:
        addic r2, r3, -1
        subfe r2, r2, r3
        addic r3, r4, -1
        subfe r3, r3, r4
        or r3, r2, r3
        blr

instead of:

_bar:
        addic r2, r3, -1
        subfe r2, r2, r3
        addic r3, r4, -1
        subfe r3, r3, r4
        or r2, r2, r3
        rlwinm r3, r2, 0, 31, 31
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21315 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-18 03:48:41 +00:00
Nate Begeman
16ac709c63 Change codegen for setcc to read the bit directly out of the condition 
register.  Added support in the .td file for the g5-specific variant
  of cr -> gpr moves that executes faster, but we currently don't
  generate it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21314 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-18 02:43:24 +00:00
Chris Lattner
d91ff7cd3b Add support for targets that require stubs for external functions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21313 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-18 01:44:27 +00:00
Chris Lattner
477d1de9b2 Handle ExternalSymbol operands in the PPC JIT 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21312 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-18 00:46:10 +00:00
Nate Begeman
f8b02949e3 Make pattern isel default for ppc 
Add new ppc beta option related to using condition registers
Make pattern isel control flag (-enable-pattern-isel) global and tristate
  0 == off
  1 == on
  2 == target default


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21309 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-15 22:12:16 +00:00
Chris Lattner
36d12733bb a new simple pass, which will be extended to be more useful in the future. 
This pass forward branches through conditions when it can show that the
conditions is either always true or false for a predecessor.  This currently
only handles the most simple cases of this, but is successful at threading
across 2489 branches and 65 switch instructions in 176.gcc, which isn't bad.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21306 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-15 19:28:32 +00:00
Andrew Lenharth
1e0d9bda62 fix calls 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21303 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-14 17:34:20 +00:00
Andrew Lenharth
3ae1829fe5 a 21264 fix, and fix the operator precidence on an and -> zap check (should fix hundreds of test cases 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21302 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-14 16:24:00 +00:00
Duraid Madina
1ce0c015ad print negative 64 bit immediates as negative numbers, makes things a little 
easier on the eyes, not that numbers like 18446744073709541376 are bad or
anything


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21300 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-14 10:08:01 +00:00
Duraid Madina
3eb7150c3e oops, this stopped us turning movl r4=0xFFFFFFFF;; and rX, r4 into zxt4 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21299 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-14 10:06:35 +00:00
Nate Begeman
7bfba7d5e3 Implement multi-way branches through logical ops on condition registers. 
This can generate considerably shorter code, reducing the size of crafty
by almost 1%.  Also fix the printing of mcrf.  The code is currently
disabled until it gets a bit more testing, but should work as-is.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21298 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-14 09:45:08 +00:00
Nate Begeman
72ea281d61 Add a couple missing transforms in getSetCC that were triggering assertions 
in the PPC Pattern ISel


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21297 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-14 08:56:52 +00:00
Duraid Madina
c4ccc2db6b we have zextloads, not sextloads! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21296 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-14 08:37:32 +00:00
Nate Begeman
ef7288c824 Add the necessary support to codegen condition register logical ops with 
register allocated condition registers.  Make sure that the printed
  output is gas compatible.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21295 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-14 03:20:38 +00:00
Nate Begeman
1b7f7fbf95 Start allocating condition registers. Almost all explicit uses of CR0 are 
now gone.  Next step is to get rid of the remaining ones and then start
allocating bools to CRs where appropriate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21294 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 23:15:44 +00:00
Nate Begeman
3664ceffdd Implement the fold shift X, zext(Y) -> shift X, Y at the target level, 
where it is safe to do so.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21293 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 22:14:14 +00:00
Nate Begeman
eea805e74c Disbale the broken fold of shift + sz[ext] for now 
Move the transform for select (a < 0) ? b : 0 into the dag from ppc isel
Enable the dag to fold and (setcc, 1) -> setcc for targets where setcc
  always produces zero or one.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21291 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 21:23:31 +00:00
Chris Lattner
97e001dec7 fix an infinite loop 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21289 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 20:06:29 +00:00
Chris Lattner
fd8d389ede fix some serious miscompiles on ia64, alpha, and ppc 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21288 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 19:53:40 +00:00
Chris Lattner
51679c430f avoid work when possible, perhaps fix the problem nate and andrew are seeing 
with != 0 comparisons vanishing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21287 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 19:41:05 +00:00
Andrew Lenharth
c24b537399 WOW, function calls still seem to work after this. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21286 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 17:17:28 +00:00
Andrew Lenharth
556c44e116 prepare for func call optimization 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21285 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 16:19:50 +00:00
Duraid Madina
ed09502a0b * add the shladd instruction 
* fold left shifts of 1, 2, 3 or 4 bits into adds

  This doesn't save much now, but should get a serious workout once
  multiplies by constants get converted to shift/add/sub sequences.
  Hold on! :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21282 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 06:12:04 +00:00
Andrew Lenharth
4f7cba5af8 add matches for SxADDL and company, as well as simplify the SxADDQ code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21281 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 05:19:55 +00:00
Chris Lattner
e9c35e7309 Implement expansion of unsigned i64 -> FP. 
Note that this probably only works for little endian targets, but is enough
to get siod working :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21280 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 05:09:42 +00:00
Duraid Madina
c02780eed1 * if ANDing with a constant of the form: 
0x00000..00FFF..FF
      ^      ^
      ^      ^
    any number of
    0's followed by
    some number of
    1's

    then we use dep.z to just paste zeros over the input. For the special
    cases where this is zxt1/zxt2/zxt4, we use those instructions instead,
    because we're all about readability!!!
    that's what it's about!! readability!

  *twitch* ;D


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21279 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 04:50:54 +00:00
Andrew Lenharth
483f22d817 added all flavors of zap for anding 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21276 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 03:47:03 +00:00
Chris Lattner
ffe284c651 Make expansion of uint->fp cast assert out instead of infinitely recurse. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21275 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 03:42:14 +00:00
Chris Lattner
5bf2686a1b Fix some mysteriously missing {}'s which cause the miscompilation of 
Olden/mst, Ptrdist/bc, Obsequi, etc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21274 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 03:29:53 +00:00
Chris Lattner
e666fcfbdd add back the optimization that Nate added for shl X, (zext_inreg y) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21273 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 02:58:13 +00:00
Chris Lattner
8a8dbfa57c Oops, remove these too. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21272 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 02:47:57 +00:00
Chris Lattner
519f40ba4e remove one more occurance of this that snuck in 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21271 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 02:46:17 +00:00
Chris Lattner
2942e9c301 Remove support for ZERO_EXTEND_INREG. This pessimizes code, genering stuff 
like this:

        ldah $1,1($31)
        lda $1,-1($1)
        and $0,$1,$24

instead of this:

        zap $0,252,$24

To get this back, the selector should recognize the ISD::AND case where this
happens and emit the appropriate ZAP instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21270 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 02:43:40 +00:00