David Bolvansky af0751b6c0 [InstCombine] Transform str(n)cmp to memcmp ...

Summary:
Motivation examples:
int strcmp_memcmp() {
    char buf[12];
    return strcmp(buf, "key") == 0;
}

int strcmp_memcmp2() {
    char buf[12];
    return strcmp(buf, "key") != 0;
}

int strncmp_memcmp() {
    char buf[12];
    return strncmp(buf, "key", 3) == 0;
}

can be turned to memcmp.

See test file for more cases.

Reviewers: efriedma

Reviewed By: efriedma

Subscribers: spatel, llvm-commits

Differential Revision: https://reviews.llvm.org/D50233

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@339410 91177308-0d34-0410-b5e6-96231b3b80d8

2018-08-10 04:32:54 +00:00

..

AddDiscriminators.cpp

Rename DEBUG macro to LLVM_DEBUG.

2018-05-14 12:53:11 +00:00

ASanStackFrameLayout.cpp

[asan] Add a full redzone after every stack variable

2017-11-18 01:13:18 +00:00

BasicBlockUtils.cpp

[TailCallElim] Preserve DT and PDT

2018-08-04 08:13:47 +00:00

BreakCriticalEdges.cpp

Transforms: Introduce Transforms/Utils.h rather than spreading the declarations amongst Scalar.h and IPO.h

2018-03-28 17:44:36 +00:00

BuildLibCalls.cpp

Remove trailing space

2018-07-30 19:41:25 +00:00

BypassSlowDivision.cpp

Move Analysis/Utils/Local.h back to Transforms

2018-06-04 21:23:21 +00:00

CallPromotionUtils.cpp

Remove trailing space

2018-07-30 19:41:25 +00:00

CloneFunction.cpp

Remove trailing space

2018-07-30 19:41:25 +00:00

CloneModule.cpp

Remove trailing space

2018-07-30 19:41:25 +00:00

CMakeLists.txt

[NFC] Factor out implicit control flow logic from GVN

2018-08-07 01:47:20 +00:00

CodeExtractor.cpp

Remove trailing space

2018-07-30 19:41:25 +00:00

CtorUtils.cpp

Rename DEBUG macro to LLVM_DEBUG.

2018-05-14 12:53:11 +00:00

DemoteRegToStack.cpp

Move Analysis/Utils/Local.h back to Transforms

2018-06-04 21:23:21 +00:00

EntryExitInstrumenter.cpp

EntryExitInstrumenter: Handle musttail calls

2018-04-06 10:14:09 +00:00

EscapeEnumerator.cpp

Move Analysis/Utils/Local.h back to Transforms

2018-06-04 21:23:21 +00:00

Evaluator.cpp

[Evaluator] Examine alias when evaluating function call

2018-07-10 16:34:23 +00:00

FlattenCFG.cpp

Move Analysis/Utils/Local.h back to Transforms

2018-06-04 21:23:21 +00:00

FunctionComparator.cpp

Use SmallPtrSet explicitly for SmallSets with pointer types (NFC).

2018-06-12 11:16:56 +00:00

FunctionImportUtils.cpp

[ThinLTO] Clear dllimport when setting dso_local.

2018-03-13 15:24:51 +00:00

GlobalStatus.cpp

[GlobalOpt] Fix exponential compile-time with selects.

2018-01-31 20:42:25 +00:00

ImplicitControlFlowTracking.cpp

[NFC] Factor out implicit control flow logic from GVN

2018-08-07 01:47:20 +00:00

ImportedFunctionsInliningStatistics.cpp

[Transforms] Change std::sort to llvm::sort in response to r327219

2018-04-13 19:47:57 +00:00

InlineFunction.cpp

Enrich inline messages

2018-08-05 14:53:08 +00:00

InstructionNamer.cpp

Transforms: Introduce Transforms/Utils.h rather than spreading the declarations amongst Scalar.h and IPO.h

2018-03-28 17:44:36 +00:00

IntegerDivision.cpp

Remove trailing space

2018-07-30 19:41:25 +00:00

LCSSA.cpp

[DebugInfo][LCSSA] Preserve debug location in lcssa phis

2018-07-31 14:54:52 +00:00

LibCallsShrinkWrap.cpp

Rename DEBUG macro to LLVM_DEBUG.

2018-05-14 12:53:11 +00:00

LLVMBuild.txt

…

Local.cpp

[Local] Add dbg location on unreachable inst in changeToUnreachable

2018-08-07 20:21:56 +00:00

LoopRotationUtils.cpp

[DebugInfo] Refactor DbgInfoIntrinsic class hierarchy.

2018-08-06 03:59:47 +00:00

LoopSimplify.cpp

Move Analysis/Utils/Local.h back to Transforms

2018-06-04 21:23:21 +00:00

LoopUnroll.cpp

[UnrollAndJam] New Unroll and Jam pass

2018-07-01 12:47:30 +00:00

LoopUnrollAndJam.cpp

[UnJ] Add debug messages for why loops are not unrolled. NFC

2018-08-02 07:30:53 +00:00

LoopUnrollPeel.cpp

Remove trailing space

2018-07-30 19:41:25 +00:00

LoopUnrollRuntime.cpp

Use SmallPtrSet explicitly for SmallSets with pointer types (NFC).

2018-06-12 11:16:56 +00:00

LoopUtils.cpp

[Dominators] Convert existing passes and utils to use the DomTreeUpdater class

2018-08-03 05:08:17 +00:00

LoopVersioning.cpp

[LoopVersioning] Don't modify the list that we iterate over in addPHINodes

2018-05-22 08:33:02 +00:00

LowerInvoke.cpp

Support a funclet operand bundle in LowerInvoke

2018-05-09 00:53:50 +00:00

LowerMemIntrinsics.cpp

[LowerMemIntrinsics] Update uses of deprecated MemIntrinsic::getAlignment API (NFC)

2018-02-05 22:23:58 +00:00

LowerSwitch.cpp

[LowerSwitch] Fixed faulty PHI nodes

2018-07-10 12:06:16 +00:00

Mem2Reg.cpp

Transforms: Introduce Transforms/Utils.h rather than spreading the declarations amongst Scalar.h and IPO.h

2018-03-28 17:44:36 +00:00

MetaRenamer.cpp

Remove trailing space

2018-07-30 19:41:25 +00:00

ModuleUtils.cpp

ModuleUtils: Stop using comdat members to generate unique module ids.

2017-10-05 21:54:53 +00:00

NameAnonGlobals.cpp

Use StringRef in Pass/PassManager APIs (NFC)

2016-10-01 02:56:57 +00:00

OrderedInstructions.cpp

[PredicateInfo] Order instructions in different BBs by DFSNumIn.

2018-06-20 17:42:01 +00:00

PredicateInfo.cpp

[PredicateInfo] Use custom mangling to support ssa_copy with unnamed types.

2018-07-24 14:49:52 +00:00

PromoteMemoryToRegister.cpp

[DebugInfo] Refactor DbgInfoIntrinsic class hierarchy.

2018-08-06 03:59:47 +00:00

SanitizerStats.cpp

Sort the remaining #include lines in include/... and lib/....

2017-06-06 11:49:48 +00:00

SimplifyCFG.cpp

llvm: Add support for "-fno-delete-null-pointer-checks"

2018-07-09 22:27:23 +00:00

SimplifyIndVar.cpp

Remove trailing space

2018-07-30 19:41:25 +00:00

SimplifyLibCalls.cpp

[InstCombine] Transform str(n)cmp to memcmp

2018-08-10 04:32:54 +00:00

SplitModule.cpp

Rename DEBUG macro to LLVM_DEBUG.

2018-05-14 12:53:11 +00:00

SSAUpdater.cpp

Remove trailing space

2018-07-30 19:41:25 +00:00

SSAUpdaterBulk.cpp

Rename DEBUG macro to LLVM_DEBUG.

2018-05-14 12:53:11 +00:00

StripGCRelocates.cpp

Fix a couple of layering violations in Transforms

2018-03-21 22:34:23 +00:00

StripNonLineTableDebugInfo.cpp

Fix some layering in StripNonLineTableDebugInfo, moving its declaration from IPO.h to Utils.h to match its implementation

2018-03-29 22:42:08 +00:00

SymbolRewriter.cpp

Remove trailing space

2018-07-30 19:41:25 +00:00

UnifyFunctionExitNodes.cpp

Remove trailing space

2018-07-30 19:41:25 +00:00

Utils.cpp

[instsimplify] Move the instsimplify pass to use more obvious file names

2018-06-29 23:36:03 +00:00

ValueMapper.cpp

Teach ValueMapper to use ODR uniqued types when available

2018-01-30 20:16:32 +00:00

VNCoercion.cpp

[GVN] Avoid casting a vector of size less than 8 bits to i8

2018-06-21 21:43:20 +00:00