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Sanjay Patel 906306d436 [LibCallSimplifier] fold memset(malloc(x), 0, x) --> calloc(1, x) 
This is a step towards solving PR25892:
https://llvm.org/bugs/show_bug.cgi?id=25892

It won't handle the reported case. As noted by the 'TODO' comments in the patch, 
we need to relax the hasOneUse() constraint and also match patterns that include
memset_chk() and the llvm.memset() intrinsic in addition to memset().

Differential Revision: http://reviews.llvm.org/D16337

llvm-svn: 258816
2016-01-26 16:17:24 +00:00
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2003-09-09-VolatileLoadElim.ll
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2003-10-29-CallSiteResolve.ll
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2003-11-03-VarargsCallBug.ll
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2004-01-13-InstCombineInvokePHI.ll
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2004-02-23-ShiftShiftOverflow.ll
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2004-03-13-InstCombineInfLoop.ll
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2004-04-04-InstCombineReplaceAllUsesWith.ll
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2007-05-10-icmp-or.ll
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2007-05-14-Crash.ll
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2007-05-18-CastFoldBug.ll
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2007-06-06-AshrSignBit.ll
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2007-06-21-DivCompareMiscomp.ll
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2007-08-02-InfiniteLoop.ll
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2007-09-10-AliasConstFold.ll
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2007-10-10-EliminateMemCpy.ll
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2007-11-15-CompareMiscomp.ll
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2007-11-22-IcmpCrash.ll
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2007-11-25-CompatibleAttributes.ll
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2007-12-10-ConstFoldCompare.ll
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2007-12-12-GEPScale.ll
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2007-12-16-AsmNoUnwind.ll
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2007-12-18-AddSelCmpSub.ll
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2007-12-28-IcmpSub2.ll
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2008-01-06-BitCastAttributes.ll
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2008-01-06-CastCrash.ll
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2008-01-06-VoidCast.ll
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2008-01-13-AndCmpCmp.ll
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2008-01-13-NoBitCastAttributes.ll
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2008-01-14-VarArgTrampoline.ll
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2008-01-21-MismatchedCastAndCompare.ll
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2008-01-21-MulTrunc.ll
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2008-01-27-FloatSelect.ll
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2008-01-29-AddICmp.ll
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2008-02-13-MulURem.ll
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2008-02-16-SDivOverflow2.ll
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2008-03-13-IntToPtr.ll
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2008-04-22-ByValBitcast.ll
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2008-04-28-VolatileStore.ll
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2008-04-29-VolatileLoadDontMerge.ll
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2008-04-29-VolatileLoadMerge.ll
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2008-05-08-LiveStoreDelete.ll
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2008-05-08-StrLenSink.ll
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2008-05-09-SinkOfInvoke.ll
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2008-05-17-InfLoop.ll
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2008-08-17-ICmpXorSignbit.ll
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2008-09-02-VectorCrash.ll
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2008-09-29-FoldingOr.ll
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2008-10-11-DivCompareFold.ll
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2008-10-23-ConstFoldWithoutMask.ll
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2008-11-01-SRemDemandedBits.ll
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2008-11-08-FCmp.ll
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2008-11-20-DivMulRem.ll
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2008-11-27-IDivVector.ll
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2008-11-27-MultiplyIntVec.ll
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2008-11-27-UDivNegative.ll
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2009-02-20-InstCombine-SROA.ll
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2009-12-17-CmpSelectNull.ll
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2010-01-28-NegativeSRem.ll
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2010-03-03-ExtElim.ll
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2010-05-30-memcpy-Struct.ll
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all-bits-shift.ll
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alloca.ll
[OperandBundles] Have InstCombine play nice with operand bundles
2015-12-23 09:58:41 +00:00
amdgcn-intrinsics.ll
AMDGPU: Rename intrinsics to use amdgcn prefix
2016-01-22 21:30:34 +00:00
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bitcast-bitcast.ll
[InstCombine] allow any pair of bitcasts to be combined
2015-12-12 00:33:36 +00:00
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bitcast-vec-canon.ll
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2015-12-12 16:44:48 +00:00
bitcast-vec-uniform.ll
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bitcast.ll
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bitcount.ll
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bitreverse-hang.ll
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2016-01-15 09:20:19 +00:00
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call.ll
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cast-set.ll
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cast.ll
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2015-12-15 01:44:07 +00:00
ceil.ll
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constant-fold-math.ll
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copysign.ll
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cos-1.ll
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cos-2.ll
[LibCallSimplifier] don't get fooled by a fake sqrt()
2016-01-20 17:41:14 +00:00
CPP_min_max.ll
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crash.ll
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distribute.ll
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div-shift.ll
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div.ll
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dom-conditions.ll
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double-float-shrink-1.ll
[LibCallSimplifier] don't get fooled by a fake fmin()
2016-01-21 20:19:54 +00:00
double-float-shrink-2.ll
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err-rep-cold.ll
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exact.ll
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exp2-1.ll
AMDGPU: mark ldexp LibCalls as unavailable
2015-12-15 17:24:15 +00:00
exp2-2.ll
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extractvalue.ll
Instcombine: destructor loads of structs that do not contains padding
2015-12-15 01:44:07 +00:00
fabs.ll
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fast-math.ll
[LibCallSimplifier] don't allow sqrt transform unless all ops are unsafe
2016-01-11 22:50:36 +00:00
fcmp-select.ll
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fcmp.ll
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fsub.ll
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fwrite-1.ll
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gc.relocate.ll
[gc.statepoint] Change gc.statepoint intrinsic's return type to token type instead of i32 type
2015-12-26 07:54:32 +00:00
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icmp-logical.ll
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icmp.ll
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idioms.ll
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indexed-gep-compares.ll
Re-commit r257064, after it was reverted in r257340.
2016-01-15 15:52:05 +00:00
inline-intrinsic-assert.ll
[LibCallSimplifier] use instruction-level fast-math-flags to transform sqrt calls
2016-01-11 22:34:19 +00:00
insert-extract-shuffle.ll
[InstCombine] insert a new shuffle in a safe place (PR25999)
2016-01-08 01:39:16 +00:00
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invoke.ll
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lifetime.ll
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load.ll
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loadstore-alignment.ll
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loadstore-metadata.ll
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log-pow.ll
[LibCallSimplifier] use instruction-level fast-math-flags to transform log calls
2016-01-11 23:31:48 +00:00
logical-select.ll
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memmove.ll
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memset2.ll
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memset_chk-1.ll
add tests to show missing memset/malloc optimizations (PR25892)
2016-01-19 23:07:10 +00:00
memset_chk-2.ll
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memset-1.ll
[LibCallSimplifier] fold memset(malloc(x), 0, x) --> calloc(1, x)
2016-01-26 16:17:24 +00:00
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memset.ll
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narrow-switch.ll
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narrow.ll
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neon-intrinsics.ll
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no_cgscc_assert.ll
[LibCallSimplifier] use instruction-level fast-math-flags to transform sqrt calls
2016-01-11 22:34:19 +00:00
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phi.ll
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pow-2.ll
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pow-4.ll
[LibCallSimplifier] use instruction-level fast-math-flags to transform pow(x, [small integer]) calls
2016-01-19 18:15:12 +00:00
pow-exp-nofastmath.ll
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pow-exp.ll
[LibCallSimplifier] use instruction-level fast-math-flags to transform pow(exp(x)) calls
2016-01-12 17:30:37 +00:00
pow-sqrt.ll
[LibCallSimplifier] use instruction-level fast-math-flags to transform pow(x, 0.5) calls
2016-01-12 19:06:35 +00:00
pr2645-0.ll
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printf-1.ll
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printf-2.ll
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printf-3.ll
Add test for r256912
2016-01-07 19:27:16 +00:00
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range-check.ll
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README.txt
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select-crash.ll
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select-extractelement.ll
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select-load-call.ll
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select-select.ll
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select.ll
Push isDereferenceableAndAlignedPointer down into isSafeToLoadUnconditionally
2016-01-17 12:35:29 +00:00
set.ll
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signext.ll
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simplify-demanded-bits-pointer.ll
…
simplify-libcalls.ll
…
sincospi.ll
…
sink_instruction.ll
…
sitofp.ll
…
sprintf-1.ll
…
sqrt-nofast.ll
…
sqrt.ll
…
srem1.ll
…
srem-simplify-bug.ll
…
srem.ll
…
stack-overalign.ll
…
stacksaverestore.ll
…
statepoint.ll
[gc.statepoint] Change gc.statepoint intrinsic's return type to token type instead of i32 type
2015-12-26 07:54:32 +00:00
store.ll
[InstCombine] Extend peephole DSE to handle unordered atomics
2015-12-17 22:19:27 +00:00
stpcpy_chk-1.ll
…
stpcpy_chk-2.ll
…
stpcpy-1.ll
…
stpcpy-2.ll
…
strcat-1.ll
…
strcat-2.ll
…
strcat-3.ll
…
strchr-1.ll
…
strchr-2.ll
…
strcmp-1.ll
…
strcmp-2.ll
…
strcpy_chk-1.ll
…
strcpy_chk-2.ll
…
strcpy_chk-64.ll
…
strcpy-1.ll
…
strcpy-2.ll
…
strcspn-1.ll
…
strcspn-2.ll
…
strlen-1.ll
…
strlen-2.ll
…
strncat-1.ll
…
strncat-2.ll
…
strncat-3.ll
…
strncmp-1.ll
…
strncmp-2.ll
…
strncpy_chk-1.ll
…
strncpy_chk-2.ll
…
strncpy-1.ll
…
strncpy-2.ll
…
strpbrk-1.ll
…
strpbrk-2.ll
…
strrchr-1.ll
…
strrchr-2.ll
…
strspn-1.ll
…
strstr-1.ll
…
strstr-2.ll
…
strto-1.ll
[attrs] Extract the pure inference of function attributes into
2015-12-27 08:41:34 +00:00
struct-assign-tbaa.ll
…
sub-xor.ll
…
sub.ll
…
switch-truncate-crash.ll
…
tan-nofastmath.ll
…
tan.ll
[LibCallSimplifier] use instruction-level fast-math-flags for tan/atan transform
2016-01-06 19:23:35 +00:00
toascii-1.ll
…
token.ll
[InstructionCombining] prepareICWorklistFromFunction halts in infinite loop with instructions of token type
2016-01-04 23:28:57 +00:00
trunc.ll
[InstCombine] fold trunc ([lshr] (bitcast vector) ) --> extractelement (PR25543)
2015-12-14 16:16:54 +00:00
type_pun.ll
…
udiv_select_to_select_shift.ll
…
udiv-simplify-bug-0.ll
…
udiv-simplify-bug-1.ll
…
udivrem-change-width.ll
…
unordered-fcmp-select.ll
…
unpack-fca.ll
Instcombine: destructor loads of structs that do not contains padding
2015-12-15 01:44:07 +00:00
urem-simplify-bug.ll
…
urem.ll
…
vec_demanded_elts.ll
…
vec_extract_2elts.ll
…
vec_extract_elt.ll
…
vec_extract_var_elt.ll
…
vec_insertelt.ll
…
vec_narrow.ll
…
vec_phi_extract.ll
…
vec_sext.ll
…
vec_shuffle.ll
…
vector_gep1.ll
…
vector_gep2.ll
…
vector-casts.ll
…
vector-mul.ll
…
vector-srem.ll
…
vector-type.ll
…
volatile_store.ll
…
vsx-unaligned.ll
…
weak-symbols.ll
…
win-math.ll
…
x86-crc32-demanded.ll
…
x86-f16c.ll
…
x86-insertps.ll
…
x86-pmovsx.ll
…
x86-pmovzx.ll
…
x86-pshufb.ll
…
x86-sse4a.ll
…
x86-vector-shifts.ll
…
x86-vperm2.ll
…
x86-xop.ll
…
xor2.ll
…
xor-undef.ll
…
xor.ll
…
zero-point-zero-add.ll
…
zeroext-and-reduce.ll
…
zext-bool-add-sub.ll
…
zext-fold.ll
…
zext-or-icmp.ll
…
zext.ll
…

README.txt 

This directory contains test cases for the instcombine transformation.  The
dated tests are actual bug tests, whereas the named tests are used to test
for features that the this pass should be capable of performing.