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992 Commits

Author SHA1 Message Date
Chris Lattner
1730078d5f Fix a crash building 176.gcc due to my recent patch, which only fixed 
half the problem.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24414 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-18 18:30:47 +00:00
Chris Lattner
ceda605fd7 This was checking the wrong GEP expression. Fixing this fixes a gccas crash 
compiling mysql reported by Ted Kremenek.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24402 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-17 19:35:42 +00:00
Andrew Lenharth
fa25e48412 the pain isn't gone unless the phinodes are spilled too 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24288 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-10 19:39:09 +00:00
Andrew Lenharth
99b8e26b84 this works with backedges to the existing entry block alot better 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24270 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-10 17:35:34 +00:00
Andrew Lenharth
183119cdf6 The pass everyone has been waiting for! 
Reg2Mem

for fun you can opt -reg2mem -mem2reg


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24267 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-10 01:58:38 +00:00
Nate Begeman
14b0529532 Add support alignment of allocation instructions. 
Add support for specifying alignment and size of setjmp jmpbufs.

No targets currently do anything with this information, nor is it presrved
in the bytecode representation.  That's coming up next.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24196 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-05 09:21:28 +00:00
Chris Lattner
3b5f45042b Implement Transforms/TailCallElim/return-undef.ll, a trivial case 
that has been sitting in my inbox since May 18. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24194 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-05 08:21:11 +00:00
Chris Lattner
c812e5d6b8 Turn sdiv into udiv if both operands have a clear sign bit. This occurs 
a few times in crafty:

OLD:    %tmp.36 = div int %tmp.35, 8            ; <int> [#uses=1]
NEW:    %tmp.36 = div uint %tmp.35, 8           ; <uint> [#uses=0]
OLD:    %tmp.19 = div int %tmp.18, 8            ; <int> [#uses=1]
NEW:    %tmp.19 = div uint %tmp.18, 8           ; <uint> [#uses=0]
OLD:    %tmp.117 = div int %tmp.116, 8          ; <int> [#uses=1]
NEW:    %tmp.117 = div uint %tmp.116, 8         ; <uint> [#uses=0]
OLD:    %tmp.92 = div int %tmp.91, 8            ; <int> [#uses=1]
NEW:    %tmp.92 = div uint %tmp.91, 8           ; <uint> [#uses=0]

Which all turn into shrs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24190 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-05 07:40:31 +00:00
Chris Lattner
11a49f2c0d Turn srem -> urem when neither input has their sign bit set. This triggers 
8 times in vortex, allowing the srems to be turned into shrs:

OLD:    %tmp.104 = rem int %tmp.5.i37, 16               ; <int> [#uses=1]
NEW:    %tmp.104 = rem uint %tmp.5.i37, 16              ; <uint> [#uses=0]
OLD:    %tmp.98 = rem int %tmp.5.i24, 16                ; <int> [#uses=1]
NEW:    %tmp.98 = rem uint %tmp.5.i24, 16               ; <uint> [#uses=0]
OLD:    %tmp.91 = rem int %tmp.5.i19, 8         ; <int> [#uses=1]
NEW:    %tmp.91 = rem uint %tmp.5.i19, 8                ; <uint> [#uses=0]
OLD:    %tmp.88 = rem int %tmp.5.i14, 8         ; <int> [#uses=1]
NEW:    %tmp.88 = rem uint %tmp.5.i14, 8                ; <uint> [#uses=0]
OLD:    %tmp.85 = rem int %tmp.5.i9, 1024               ; <int> [#uses=2]
NEW:    %tmp.85 = rem uint %tmp.5.i9, 1024              ; <uint> [#uses=0]
OLD:    %tmp.82 = rem int %tmp.5.i, 512         ; <int> [#uses=2]
NEW:    %tmp.82 = rem uint %tmp.5.i1, 512               ; <uint> [#uses=0]
OLD:    %tmp.48.i = rem int %tmp.5.i.i161, 4            ; <int> [#uses=1]
NEW:    %tmp.48.i = rem uint %tmp.5.i.i161, 4           ; <uint> [#uses=0]
OLD:    %tmp.20.i2 = rem int %tmp.5.i.i, 4              ; <int> [#uses=1]
NEW:    %tmp.20.i2 = rem uint %tmp.5.i.i, 4             ; <uint> [#uses=0]

it also occurs 9 times in gcc, but with odd constant divisors (1009 and 61)
so the payoff isn't as great.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24189 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-05 07:28:37 +00:00
Andrew Lenharth
7bbff04f7f make this 64 bit clean, fixed test30 of /Regression/Transforms/InstCombine/add.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24158 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-02 18:35:40 +00:00
Chris Lattner
76ff2c7504 Limit the search depth of MaskedValueIsZero to 6 instructions, to avoid 
bad cases.  This fixes Markus's second testcase in PR639, and should
seal it for good.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24123 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-31 18:35:52 +00:00
Chris Lattner
9fefdb5d66 This pass is now obsolete since all targets have moved to the SelectionDAG 
infrastructure and the simple isels have been removed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24090 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-29 05:33:46 +00:00
Chris Lattner
cfd65100c4 Pull some code out into a function, give it the ability to see through +. 
This allows us to turn code like malloc(4*x+4) -> malloc int, (x+1)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24081 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-29 04:36:15 +00:00
Chris Lattner
455fcc8d35 Remove a special case, allowing the general case to handle it. No functionality 
change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24076 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-29 03:19:53 +00:00
Chris Lattner
325231c925 Fix a bit of backwards logic that broke exptree and smg2000 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24056 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-28 16:27:35 +00:00
Chris Lattner
108e902aeb Do not sink any instruction with side effects, including vaarg. This fixes 
PR640


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24046 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-27 17:13:11 +00:00
Chris Lattner
0e026de6ac Fix typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24033 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-27 06:26:26 +00:00
Chris Lattner
e679288a30 Teach instcombine to promote stuff like (cast (malloc sbyte, 8*X) to int*) 
into: malloc int, (2*X)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24032 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-27 06:24:46 +00:00
Chris Lattner
8142b0a54b Promote cases like cast (malloc sbyte, 100) to int* into 
(malloc [25 x int]) directly without having to convert to
(malloc [100 x sbyte]) first.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24031 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-27 06:12:00 +00:00
Chris Lattner
0ddac2a1c3 Minor change to this file to support obscure cases with constant array amounts 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24030 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-27 05:53:56 +00:00
Chris Lattner
e9f15e538a fold nested and's early to avoid inefficiencies in MaskedValueIsZero. This 
fixes a very slow compile in PR639.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24011 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-26 17:18:16 +00:00
Chris Lattner
39387a5c93 Handle allocations that, even after removing dead uses, still have more than 
one use (but one is a cast).  This handles the very common case of:

 X = alloc [n x byte]
 Y = cast X to somethingbetter
 seteq X, null

In order to avoid infinite looping when there are multiple casts, we only
allow this if the xform is strictly increasing the alignment of the
allocation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23961 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-24 06:35:18 +00:00
Chris Lattner
18e78bb09e Fix a bug where we would 'promote' an allocation from one type to another 
where the second has less alignment required.  If we had explicit alignment
support in the IR, we could handle this case, but we can't until we do.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23960 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-24 06:26:18 +00:00
Chris Lattner
b53c2382a9 Before promoting a malloc type, remove dead uses. This makes instcombine 
more effective at promoting these allocations, catching them earlier in the
compile process.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23959 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-24 06:22:12 +00:00
Chris Lattner
b3f8397a3d Pull some code out into a function, no functionality change 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23958 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-24 06:03:58 +00:00
Chris Lattner
f36aeedaa3 DONT_BUILD_RELINKED is gone and implied by BUILD_ARCHIVE now 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23940 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-24 02:26:13 +00:00
Chris Lattner
ab0ed3592b Only build .a file versions of these libraries, instead of .a and .o versions. 
This should speed up build times.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23933 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-24 01:59:48 +00:00
Chris Lattner
492d4a9d84 Make sure that anything using the ADCE pass pulls in the UnifyFunctionExitNodes 
code


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23931 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-24 01:40:23 +00:00
Jeff Cohen
66c5fd6c53 When a function takes a variable number of pointer arguments, with a zero 
pointer marking the end of the list, the zero *must* be cast to the pointer
type.  An un-cast zero is a 32-bit int, and at least on x86_64, gcc will
not extend the zero to 64 bits, thus allowing the upper 32 bits to be
random junk.

The new END_WITH_NULL macro may be used to annotate a such a function
so that GCC (version 4 or newer) will detect the use of un-casted zero
at compile time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23888 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-23 04:37:20 +00:00
Chris Lattner
63ad7963e4 My previous patch was too conservative. Reject FP and void types, but do 
allow pointer types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23859 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-21 05:45:41 +00:00
Chris Lattner
1e9f3af561 Do NOT touch FP ops with LSR. This fixes a testcase Nate sent me from an 
inner loop like this:

LBB_RateConvertMono8AltiVec_2:  ; no_exit
        lis r2, ha16(.CPI_RateConvertMono8AltiVec_0)
        lfs f3, lo16(.CPI_RateConvertMono8AltiVec_0)(r2)
        fmr f3, f3
        fadd f0, f2, f0
        fadd f3, f0, f3
        fcmpu cr0, f3, f1
        bge cr0, LBB_RateConvertMono8AltiVec_2  ; no_exit

to an inner loop like this:

LBB_RateConvertMono8AltiVec_1:  ; no_exit
        fsub f2, f2, f1
        fcmpu cr0, f2, f1
        fmr f0, f2
        bge cr0, LBB_RateConvertMono8AltiVec_1  ; no_exit

Doh! good catch!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23838 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-20 04:47:10 +00:00
Chris Lattner
8532cf6258 Make this work for FP constantexprs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23773 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-17 20:18:38 +00:00
Chris Lattner
5e678e03b7 Oops, X+0.0 isn't foldable, but X+-0.0 is. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23772 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-17 17:56:38 +00:00
Chris Lattner
560a17d3bc relax this a bit, as we only support the default rounding mode 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23771 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-17 17:49:32 +00:00
Chris Lattner
d6155e96f7 Fix (hopefully the last) issue where LSR is nondeterminstic. When pulling 
out CSE's of base expressions it could build a result whose order was
nondet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23698 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-11 18:41:04 +00:00
Chris Lattner
7b445c521b Fix another problem where LSR was being nondeterminstic. Also remove elements 
from the end of a vector instead of the beginning


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23697 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-11 18:30:57 +00:00
Chris Lattner
b4dd1b86fa Fix another lsr-is-nondeterministic case 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23695 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-11 18:17:57 +00:00
Chris Lattner
5fb0deb43a Make MaskedValueIsZero a bit more aggressive 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23677 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-09 22:08:50 +00:00
Chris Lattner
60de63d0b6 Fix funky xcode indentation 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23674 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-09 06:36:35 +00:00
Chris Lattner
a18af06360 Hrm, you didn't see this. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23673 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-09 06:24:02 +00:00
Chris Lattner
7305ae28df Fix a source of non-determinism in the backend: the order of processing 
IV strides dependend on the pointer order of the strides in memory.
Non-determinism is bad.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23672 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-09 06:20:55 +00:00
Jeff Cohen
68d98e0bdc Remove useless variable. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23656 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-07 05:28:29 +00:00
Chris Lattner
5e8ca66914 Make IVUseShouldUsePostIncValue more aggressive when the use is a PHI. In 
particular, it should realize that phi's use their values in the pred block
not the phi block itself.  This change turns our em3d loop from this:

_test:
        cmpwi cr0, r4, 0
        bgt cr0, LBB_test_2     ; entry.no_exit_crit_edge
LBB_test_1:     ; entry.loopexit_crit_edge
        li r2, 0
        b LBB_test_6    ; loopexit
LBB_test_2:     ; entry.no_exit_crit_edge
        li r6, 0
LBB_test_3:     ; no_exit
        or r2, r6, r6
        lwz r6, 0(r3)
        cmpw cr0, r6, r5
        beq cr0, LBB_test_6     ; loopexit
LBB_test_4:     ; endif
        addi r3, r3, 4
        addi r6, r2, 1
        cmpw cr0, r6, r4
        blt cr0, LBB_test_3     ; no_exit
LBB_test_5:     ; endif.loopexit.loopexit_crit_edge
        addi r3, r2, 1
        blr
LBB_test_6:     ; loopexit
        or r3, r2, r2
        blr

into:

_test:
        cmpwi cr0, r4, 0
        bgt cr0, LBB_test_2     ; entry.no_exit_crit_edge
LBB_test_1:     ; entry.loopexit_crit_edge
        li r2, 0
        b LBB_test_5    ; loopexit
LBB_test_2:     ; entry.no_exit_crit_edge
        li r6, 0
LBB_test_3:     ; no_exit
        lwz r2, 0(r3)
        cmpw cr0, r2, r5
        or r2, r6, r6
        beq cr0, LBB_test_5     ; loopexit
LBB_test_4:     ; endif
        addi r3, r3, 4
        addi r6, r6, 1
        cmpw cr0, r6, r4
        or r2, r6, r6
        blt cr0, LBB_test_3     ; no_exit
LBB_test_5:     ; loopexit
        or r3, r2, r2
        blr


Unfortunately, this is actually worse code, because the register coallescer
is getting confused somehow.  If it were doing its job right, it could turn the
code into this:

_test:
        cmpwi cr0, r4, 0
        bgt cr0, LBB_test_2     ; entry.no_exit_crit_edge
LBB_test_1:     ; entry.loopexit_crit_edge
        li r6, 0
        b LBB_test_5    ; loopexit
LBB_test_2:     ; entry.no_exit_crit_edge
        li r6, 0
LBB_test_3:     ; no_exit
        lwz r2, 0(r3)
        cmpw cr0, r2, r5
        beq cr0, LBB_test_5     ; loopexit
LBB_test_4:     ; endif
        addi r3, r3, 4
        addi r6, r6, 1
        cmpw cr0, r6, r4
        blt cr0, LBB_test_3     ; no_exit
LBB_test_5:     ; loopexit
        or r3, r6, r6
        blr

... which I'll work on next. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23604 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 02:50:05 +00:00
Chris Lattner
0ae33eb243 Refactor some code into a function 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23603 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 01:04:44 +00:00
Chris Lattner
1902ff4d82 This break is bogus and I have no idea why it was there. Basically it prevents 
memoizing code when IV's are used by phinodes outside of loops.  In a simple
example, we were getting this code before (note that r6 and r7 are isomorphic
IV's):

        li r6, 0
        or r7, r6, r6
LBB_test_3:     ; no_exit
        lwz r2, 0(r3)
        cmpw cr0, r2, r5
        or r2, r7, r7
        beq cr0, LBB_test_5     ; loopexit
LBB_test_4:     ; endif
        addi r2, r7, 1
        addi r7, r7, 1
        addi r3, r3, 4
        addi r6, r6, 1
        cmpw cr0, r6, r4
        blt cr0, LBB_test_3     ; no_exit

Now we get:

        li r6, 0
LBB_test_3:     ; no_exit
        or r2, r6, r6
        lwz r6, 0(r3)
        cmpw cr0, r6, r5
        beq cr0, LBB_test_6     ; loopexit
LBB_test_4:     ; endif
        addi r3, r3, 4
        addi r6, r2, 1
        cmpw cr0, r6, r4
        blt cr0, LBB_test_3     ; no_exit

this was noticed in em3d.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23602 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 00:37:33 +00:00
Chris Lattner
37edbf0b21 when checking if we should move a split edge block outside of a loop, 
check the presplit pred, not the post-split pred.  This was causing us
to make the wrong decision in some cases, leaving the critical edge block
in the loop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23601 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-03 00:31:52 +00:00
Chris Lattner
fe15830f96 Make the pass name simpler 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23476 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 21:10:32 +00:00
Chris Lattner
ebe61201d1 Eliminate GetGEPGlobalInitializer in favor of the more powerful 
ConstantFoldLoadThroughGEPConstantExpr function in the utils lib.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23446 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 05:28:52 +00:00
Chris Lattner
363f2a26d5 Factor the GetGEPGlobalInitializer out of this pass and into Transforms/Utils 
as ConstantFoldLoadThroughGEPConstantExpr.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23445 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 05:28:06 +00:00
Chris Lattner
5931c54e85 Move MaskedValueIsZero up. 
Match a bunch of idioms for sign extensions, implementing InstCombine/signext.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23428 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-24 23:43:33 +00:00