Commit Graph

42884 Commits

Author SHA1 Message Date
Evan Cheng
884c70c912 On x86 favors folding short immediate into some arithmetic operations (e.g. add, and, xor, etc.) because materializing an immediate in a register is expensive in turns of code size.
e.g.
movl 4(%esp), %eax
addl $4, %eax

is 2 bytes shorter than

movl $4, %eax
addl 4(%esp), %eax


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60139 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 00:49:46 +00:00
Dale Johannesen
56eca9103e Add a missing case in visitADD.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60137 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 00:43:21 +00:00
Evan Cheng
bc7e0f5dd6 Add -march=x86.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60135 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 00:37:06 +00:00
Ted Kremenek
9f1f00ab1b Add typedef to StringMapEntry.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60134 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 00:17:25 +00:00
Mikhail Glushenkov
7e6d70a425 Disallow multiple edges.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60127 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 22:59:45 +00:00
Bill Wendling
e21815f41b Add x86-specific test for add-with-overflow intrinsics.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60125 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 22:42:19 +00:00
Bill Wendling
3fafd93560 Generate something sensible for an [SU]ADDO op when the overflow/carry flag is
the conditional for the BRCOND statement. For instance, it will generate:

    addl %eax, %ecx
    jo LOF

instead of

    addl %eax, %ecx
    ; About 10 instructions to compare the signs of LHS, RHS, and sum.
    jl LOF



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60123 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 22:37:40 +00:00
Chris Lattner
ab8b794a78 Turn on my codegen prepare heuristic by default. It doesn't affect
performance in most cases on the Grawp tester, but does speed some 
things up (like shootout/hash by 15%).  This also doesn't impact 
compile time in a noticable way on the Grawp tester.

It also, of course, gets the testcase it was designed for right :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60120 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 22:16:44 +00:00
Bill Wendling
baa39d8664 Small formatting change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60113 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 19:19:05 +00:00
Bill Wendling
fbaa7edf93 Update to explain how ssp and sspreq attributes override each other.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60112 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 19:07:40 +00:00
Devang Patel
da278753c4 Fix typo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60111 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 18:13:11 +00:00
Evan Cheng
07213cb4b7 Cosmetic.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60110 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 18:00:00 +00:00
Duncan Sands
af7852f094 Check that running the DAG combiner between type
and operation legalization does something useful.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60108 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 16:44:30 +00:00
Mikhail Glushenkov
dbb61d1bac Describe some more options in the man page.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60105 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 13:40:08 +00:00
Nuno Lopes
3cef088484 ignore build dirs and generated files
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60104 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 13:10:39 +00:00
Sanjiv Gupta
d3f01aa5a1 Allow custom lowering of ADDE/ADDC/SUBE/SUBC operations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60102 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 11:19:00 +00:00
Mikhail Glushenkov
1f1fab8c91 Fix the -I option (llvmc -I dir1 -I dir2 didn't work).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60101 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 10:57:31 +00:00
Mikhail Glushenkov
8b4c5f5d26 Refactor Tools.td to remove repetition.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60100 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 10:56:56 +00:00
Mikhail Glushenkov
3acc921b26 Small fix: the error message was incorrect in some cases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60099 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 10:55:45 +00:00
Sanjiv Gupta
8f78fa827e Emit declaration for globals and externs.
Custom lower AND, OR, XOR bitwise operations.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60098 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 10:53:50 +00:00
Dan Gohman
25a1b47cc3 Fish kill flag annotations in PUSH instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60095 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 06:39:12 +00:00
Dan Gohman
2ad8245566 LiveRanges are represented as half-open ranges. Fix the findLiveInMBBs code
and the LiveInterval.h top-level comment and accordingly. This fixes blocks
having spurious live-in registers in boundary cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60092 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 05:50:31 +00:00
Chris Lattner
695d8ec33b teach the new heuristic how to handle inline asm.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60088 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 04:59:11 +00:00
Devang Patel
6f9f3e1a18 Disable -loop-index-split for now.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60087 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 04:58:14 +00:00
Ted Kremenek
5984680c1f Add 'tell' method to raw_fd_ostream that clients can use to query the current location in the file the stream is writing to.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60085 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 03:33:13 +00:00
Chris Lattner
896617b776 Improve ValueAlreadyLiveAtInst with a cheap and dirty, but effective
heuristic: the value is already live at the new memory operation if
it is used by some other instruction in the memop's block.  This is
cheap and simple to compute (moreso than full liveness).

This improves the new heuristic even more.  For example, it cuts two
out of three new instructions out of 255.vortex:DbmFileInGrpHdr, 
which is one of the functions that the heuristic regressed.  This
overall eliminates another 40 instructions from 403.gcc and visibly
reduces register pressure in 255.vortex (though this only actually
ends up saving the 2 instructions from the whole program).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60084 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 03:20:37 +00:00
Nick Lewycky
f9ef5b3ff5 __fastcall and __stdcall are mingw extensions to gcc for windows. Use the
__attribute__ notation which is supported on more platforms.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60083 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 03:17:27 +00:00
Chris Lattner
84d1b40d44 Start rewroking a subpiece of the profitability heuristic to be
phrased in terms of liveness instead of as a horrible hack.  :)

In pratice, this doesn't change the generated code for either 
255.vortex or 403.gcc, but it could cause minor code changes in 
theory.  This is framework for coming changes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60082 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 03:02:41 +00:00
Zhongxing Xu
3253f4c979 Adjust indent.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60081 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 02:57:24 +00:00
Chris Lattner
c5dd22a333 add a long-overdue AllocaInst::isStaticAlloca method.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60080 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 02:54:17 +00:00
Bill Wendling
ad2b173f9b Add test for rdar://6394879.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60079 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 02:21:12 +00:00
Chris Lattner
653b2581df add a comment, make save/restore logic more obvious.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60076 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 02:11:11 +00:00
Chris Lattner
5eecb7f164 This adds in some code (currently disabled unless you pass
-enable-smarter-addr-folding to llc) that gives CGP a better
cost model for when to sink computations into addressing modes.
The basic observation is that sinking increases register 
pressure when part of the addr computation has to be available
for other reasons, such as having a use that is a non-memory
operation.  In cases where it works, it can substantially reduce
register pressure.

This code is currently an overall win on 403.gcc and 255.vortex
(the two things I've been looking at), but there are several 
things I want to do before enabling it by default:

1. This isn't doing any caching of results, so it is much slower 
   than it could be.  It currently slows down release-asserts llc 
   by 1.7% on 176.gcc: 27.12s -> 27.60s.
2. This doesn't think about inline asm memory operands yet.
3. The cost model botches the case when the needed value is live
   across the computation for other reasons.

I'll continue poking at this, and eventually turn it on as llcbeta.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60074 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 02:00:14 +00:00
Evan Cheng
794a7dbce0 Revert r60042. IndVarSimplify should check if APFloat is PPCDoubleDouble first before trying to convert it to an integer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60072 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 01:11:57 +00:00
Chris Lattner
2efbbb38ba Teach CodeGenPrepare to look through Bitcast instructions when attempting to
optimize addressing modes.  This allows us to optimize things like isel-sink2.ll
into:

	movl	4(%esp), %eax
	cmpb	$0, 4(%eax)
	jne	LBB1_2	## F
LBB1_1:	## TB
	movl	$4, %eax
	ret
LBB1_2:	## F
	movzbl	7(%eax), %eax
	ret

instead of:

_test:
	movl	4(%esp), %eax
	cmpb	$0, 4(%eax)
	leal	4(%eax), %eax
	jne	LBB1_2	## F
LBB1_1:	## TB
	movl	$4, %eax
	ret
LBB1_2:	## F
	movzbl	3(%eax), %eax
	ret

This shrinks (e.g.) 403.gcc from 1133510 to 1128345 lines of .s.

Note that the 2008-10-16-SpillerBug.ll testcase is dubious at best, I doubt
it is really testing what it thinks it is.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60068 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 00:26:16 +00:00
Chris Lattner
6d235bb7a0 fix an over-reduced test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60067 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 00:12:08 +00:00
Chris Lattner
d87f570270 this doesn't need EH
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60066 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 00:03:26 +00:00
Nuno Lopes
0492c4929e ignore tests output
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60065 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 00:02:09 +00:00
Nuno Lopes
08d67c7763 change AnnotationManager to use 'const char*' instead of std::string. this fixes the leakage of those strings and avoids the creation of such strings in static cosntructors (should result in a little improvement of startup time)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60064 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 00:00:44 +00:00
Oscar Fuentes
75ea1933a5 CMake: Removed tools/llvmc2 directory hierarchy.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60054 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-25 22:19:48 +00:00
Oscar Fuentes
63c956c083 CMake: llvmc2 is now known as llvmc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60052 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-25 22:18:49 +00:00
Mikhail Glushenkov
a606d1f34e Add a man page for llvmc. Really basic for now, will be updated later.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60049 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-25 21:38:38 +00:00
Mikhail Glushenkov
113ec35f7f Since the old llvmc was removed, rename llvmc2 to llvmc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60048 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-25 21:38:12 +00:00
Mikhail Glushenkov
d91487785f Make -fsyntax-only, -include and -emit-llvm work for C++ and Objective-C/C++.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60047 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-25 21:35:20 +00:00
Mikhail Glushenkov
536637fb75 docs: Add author info + fix incorrect code example.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60046 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-25 21:34:53 +00:00
Mikhail Glushenkov
ebdeca786d Small documentation update.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60045 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-25 21:34:29 +00:00
Mikhail Glushenkov
f80f0aacf9 Document the plugin priority feature.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60044 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-25 21:34:01 +00:00
Bill Wendling
740464e616 A simplification for checking whether the signs of the operands and sum differ. Thanks, Duncan.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60043 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-25 19:40:17 +00:00
Evan Cheng
88f2d6c167 convertToSignExtendedInteger should return opInvalidOp instead of asserting if sematics of float does not allow arithmetics.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60042 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-25 19:00:29 +00:00
Dan Gohman
878ef1d5bc Suppress warnings.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60041 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-25 18:53:54 +00:00