02aac922b4
Update DebugInfo interface to use metadata, instead of special named llvm.dbg.... global variables, to encode debugging information in llvm IR. This is mostly a mechanical change that tests metadata support very well.
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This change speeds up llvm-gcc by more then 6% at "-O0 -g" (measured by compiling InstructionCombining.cpp!)
llvm-svn: 79977
2009-08-25 05:24:07 +00:00
23e62c532c
Change getelementptr folding to use APInt instead of uint64_t for
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offset computations. This fixes a truncation bug on targets that
don't have 64-bit pointers.
llvm-svn: 79639
2009-08-21 16:52:54 +00:00
6e32e5cf0c
Add targetdata strings to these tests, since SimplifyLibCalls uses
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TargetData to find the pointer size.
llvm-svn: 79490
2009-08-19 23:18:49 +00:00
c59ba42b0f
Fix a bug in the over-index constant folding. When over-indexing an
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array member of a struct, it's possible to land in an arbitrary position
inside that struct, such that attempting to find further getelementptr
indices will fail. In such cases, folding cannot be done.
llvm-svn: 79485
2009-08-19 22:46:59 +00:00
81ce842ecf
Canonicalize indices in a constantexpr GEP. If Indices exceed the
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static extents of the static array type, it causes GlobalOpt and
other passes to be more conservative. This canonicalization also
allows the constant folder to add "inbounds" to GEPs.
llvm-svn: 79440
2009-08-19 18:18:36 +00:00
cbfe9b195c
Fix up PHI nodes correctly in the presence of unreachable BBs, part two. Also
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delete a newed pointer, and improve readability a little bit.
llvm-svn: 79411
2009-08-19 07:16:57 +00:00
dea2358c68
Fix SimplifyLibcalls and ValueTracking to check mayBeOverridden
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before performing optimizations based on constant string values.
llvm-svn: 79384
2009-08-19 00:11:12 +00:00
bf2a9aedca
Generalize ScalarEvolution to be able to analyze GEPs when
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TargetData is not present. It still uses TargetData when available.
This generalization also fixed some limitations in the TargetData
case; the attached testcase covers this.
llvm-svn: 79344
2009-08-18 16:46:41 +00:00
82ac81b1cc
Fix a bug that caused globalopt to miscompile tramp3d: don't miss
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unruly indices for arrays that are members of structs.
llvm-svn: 79337
2009-08-18 14:58:19 +00:00
3a6fbfa6a4
Test the pass the test is actually for, instead of one that doesn't exist.
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llvm-svn: 79257
2009-08-17 17:41:29 +00:00
4c737147e1
Don't crash on critical edge. Patch by Andre Tavares.
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llvm-svn: 79252
2009-08-17 17:00:57 +00:00
d87648a850
Add a test that shows that SSI is working correctly.
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llvm-svn: 79230
2009-08-17 07:32:08 +00:00
aa464002f0
Don't crash trying to promote VLAs.
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llvm-svn: 79226
2009-08-17 05:37:31 +00:00
d56fca4708
Fix for PR3016: detect the tricky case, where there are
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unfoldable references to a PHI node in the block being folded, and disable
the transformation in that case. The correct transformation of such PHI
nodes depends on whether BB dominates Succ, and dominance is expensive
to compute here. (Alternatively, it's possible to check whether any
uses are live, but that's also essentially a dominance calculation.
Another alternative is to use reg2mem, but it probably isn't a good idea to
use that in simplifycfg.)
Also, remove some incorrect code from CanPropagatePredecessorsForPHIs
which is made unnecessary with this patch: it didn't consider the case
where a PHI node in BB has multiple uses.
llvm-svn: 79174
2009-08-16 04:23:49 +00:00
dd0e74ceee
SSI construction should just go ahead and ignore instructions in unreachable
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blocks.
llvm-svn: 79132
2009-08-15 20:12:18 +00:00
a95379d165
When InstCombine simplifies a load -> extract element to gep -> load, place
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the new load by the old load instead of by the extract element because
a store could have occurred between the load and extract element.
llvm-svn: 78891
2009-08-13 05:12:13 +00:00
e274526d78
Make LLVM Assembly dramatically easier to read by aligning the comments,
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using formatted_raw_ostream's PadToColumn.
Before:
bb1: ; preds = %bb
%2 = sext i32 %i.01 to i64 ; <i64> [#uses=1]
%3 = getelementptr double* %p, i64 %2 ; <double*> [#uses=1]
%4 = load double* %3, align 8 ; <double> [#uses=1]
%5 = fmul double %4, 1.100000e+00 ; <double> [#uses=1]
%6 = sext i32 %i.01 to i64 ; <i64> [#uses=1]
%7 = getelementptr double* %p, i64 %6 ; <double*> [#uses=1]
After:
bb1: ; preds = %bb
%2 = sext i32 %i.01 to i64 ; <i64> [#uses=1]
%3 = getelementptr double* %p, i64 %2 ; <double*> [#uses=1]
%4 = load double* %3, align 8 ; <double> [#uses=1]
%5 = fmul double %4, 1.100000e+00 ; <double> [#uses=1]
%6 = sext i32 %i.01 to i64 ; <i64> [#uses=1]
%7 = getelementptr double* %p, i64 %6 ; <double*> [#uses=1]
Several tests required whitespace adjustments.
llvm-svn: 78816
2009-08-12 17:23:50 +00:00
4ac2f639cd
Transform -X/C to X/-C, implementing a README.txt entry.
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llvm-svn: 78812
2009-08-12 16:37:02 +00:00
908da3d97e
Optimize (x/C)*C to x if the division is exact.
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llvm-svn: 78811
2009-08-12 16:33:09 +00:00
dbae4db67a
Optimize exact sdiv by a constant power of 2 to ashr.
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llvm-svn: 78714
2009-08-11 20:47:47 +00:00
a72f856aa4
Don't assume that external global variables are aligned at their preferred
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alignment. Only the minimum alignment guaranteed by the ABI may be assumed.
llvm-svn: 78668
2009-08-11 15:50:03 +00:00
eaed26eb0e
Add -disable-output. Thanks Bill!
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llvm-svn: 78009
2009-08-03 22:24:22 +00:00
f011f5a8a2
Add a new Constant::getIntegerValue helper function, and convert a
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few places in InstCombine to use it, to fix problems handling pointer
types. This fixes the recent llvm-gcc bootstrap error.
llvm-svn: 78005
2009-08-03 22:07:33 +00:00
ca9a4f1045
PR4662: Fix a crash introduced by the recent LLVMContext changes.
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llvm-svn: 77716
2009-07-31 19:36:47 +00:00
98ddd164d8
Fix PR4645 which was fallout from the fix for PR4641.
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- Call RAUW to delete all instructions (this is a patch from Nick Lewycky).
llvm-svn: 77512
2009-07-29 22:00:43 +00:00
013c8e5474
Just discard the output, no need to turn it back into text.
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llvm-svn: 77439
2009-07-29 06:14:52 +00:00
1d3defa392
don't dump .bc file to stdout, and simplify this to a trivial testcase.
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llvm-svn: 77436
2009-07-29 05:32:07 +00:00
f82326b984
Bulk erasing instructions without RAUWing them is unsafe. Instead, break them
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into a new BB that has no predecessors.
llvm-svn: 77433
2009-07-29 05:17:50 +00:00
31a9b9880b
Teach instcombine to respect and preserve inbounds. Add inbounds
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to a few tests where it is required for the expected transformation.
llvm-svn: 77290
2009-07-28 01:40:03 +00:00
7152d39d6d
merge vector-casts-0.ll into vector-casts.ll
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llvm-svn: 76864
2009-07-23 05:33:39 +00:00
7d55541e56
Make some existing optimizations that would only trigger on scalars
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also apply to vectors. This allows us to compile this:
#include <emmintrin.h>
__m128i a(__m128 a, __m128 b) { return a==a & b==b; }
__m128i b(__m128 a, __m128 b) { return a!=a | b!=b; }
to:
_a:
cmpordps %xmm1, %xmm0
ret
_b:
cmpunordps %xmm1, %xmm0
ret
with clang instead of to a ton of horrible code.
llvm-svn: 76863
2009-07-23 05:32:17 +00:00
b4ff7de8bd
convert a test to filecheck format. This fixes an endemic problem
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with negative tests: this test wasn't checking what it thought it was
because it was grepping .bc, not .ll.
llvm-svn: 76861
2009-07-23 05:27:48 +00:00
4a3affbdcf
rename test
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llvm-svn: 76860
2009-07-23 05:25:12 +00:00
a3a6dea8d5
Add a testcase for PR2831.
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llvm-svn: 76527
2009-07-21 01:02:18 +00:00
1a7ab9473f
The upper argument of ConstantRange is exclusive, not inclusive.
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llvm-svn: 76492
2009-07-20 22:34:18 +00:00
33a3fd0b9c
Revert the addition of hasNoPointerOverflow to GEPOperator.
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Getelementptrs that are defined to wrap are virtually useless to
optimization, and getelementptrs that are undefined on any kind
of overflow are too restrictive -- it's difficult to ensure that
all intermediate addresses are within bounds. I'm going to take
a different approach.
Remove a few optimizations that depended on this flag.
llvm-svn: 76437
2009-07-20 17:43:30 +00:00
048e78fc5b
Canonicalize bitcasts between types like <1 x i64> and i64 to
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insertelement/extractelement.
I'm not entirely sure this is precisely what we want to do: should we
prefer bitcast(insertelement) or insertelement(bitcast)? Similarly. should we
prefer extractelement(bitcast) or bitcast(extractelement)?
llvm-svn: 76345
2009-07-18 23:06:53 +00:00
eb6bcf3462
Back out 76300; apparently the preference is to canonicalize the other
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way (bitcast -> insert/extractelement).
llvm-svn: 76325
2009-07-18 19:04:16 +00:00
52dbfc21c5
Add combine: X sdiv (1 << Y) -> X udiv (1 << Y) when X doesn't have the
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sign bit set.
llvm-svn: 76304
2009-07-18 09:53:21 +00:00
a807aae226
Canonicalize insert/extractelement from single-element vectors into
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bitcasts.
It would also be possible to canonicalize the other way; does anyone
have a preference?
llvm-svn: 76300
2009-07-18 09:07:47 +00:00
ff9bf97ceb
Fix simplifylibcalls memset recognition to work on 64-bit platforms
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where int is 32 bits.
llvm-svn: 76293
2009-07-18 08:34:51 +00:00
8c129d7687
Fill in some holes in ScalarEvolution's loop iteration condition
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analysis. This allows indvars to emit a simpler loop trip count
expression.
llvm-svn: 76085
2009-07-16 17:34:36 +00:00
662da55c5f
Switch invars away from using isTrapping when it really shouldn't be
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using it.
llvm-svn: 75852
2009-07-15 22:48:29 +00:00
ebe66ab13b
Don't restrict the set of instructions where we try to constant-fold the
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operands; it's possible to end up with a constant-foldable operand to
most instructions, even those which can't trap.
llvm-svn: 75845
2009-07-15 22:13:34 +00:00
92b969ba80
Fix the expansion of umax and smax in the case where one or more of
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the operands have pointer type, so that the resulting type matches
the original SCEV type, and so that unnecessary ptrtoints are
avoided in common cases.
llvm-svn: 75680
2009-07-14 20:57:04 +00:00
69ddd05329
Add a testcase for a bug fixed by r75634.
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llvm-svn: 75644
2009-07-14 18:15:00 +00:00
3be62697df
Revert 75571; I'm convinced this isn't the right thing to do.
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llvm-svn: 75642
2009-07-14 17:48:25 +00:00
14379df4e6
Fix trivial todo in instcombine.
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llvm-svn: 75586
2009-07-14 02:01:53 +00:00
4d6149f356
Update LoopSimplify and LoopUnswitch to use the new makeLoopInvariant
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function.
llvm-svn: 75584
2009-07-14 01:37:59 +00:00
03d5d0f451
Fix indvars to not assume that a loop with a single unique exit
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block has a single unique exiting block.
llvm-svn: 75579
2009-07-14 01:09:02 +00:00
Devang Patel