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llvm-project/llvm/test/Transforms
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Duncan P. N. Exon Smith fd5c553f54 GVN: Enable value forwarding for calloc 
Enable value forwarding for loads from `calloc()` without an intervening
store.

This change extends GVN to handle the following case:

    %1 = tail call noalias i8* @calloc(i64 1, i64 4)
    %2 = bitcast i8* %1 to i32*
    ; This load is trivially constant zero
    %3 = load i32* %2, align 4

This is analogous to the handling for `malloc()` in the same places.
`malloc()` returns `undef`; `calloc()` returns a zero value.  Note that
it is correct to return zero even for out of bounds GEPs since the
result of such a GEP would be undefined.

Patch by Philip Reames!

llvm-svn: 210828
 		2014-06-12 21:16:19 +00:00
..
ADCE [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
AddDiscriminators Fix bug 19437 - Only add discriminators for DWARF 4 and above. 2014-04-17 22:33:50 +00:00
ArgumentPromotion IR: Conservatively verify inalloca arguments 2014-04-30 17:22:00 +00:00
AtomicExpandLoadLinked/ARM Reduce verbiage of lit.local.cfg files 2014-06-09 22:42:55 +00:00
BBVectorize Reduce verbiage of lit.local.cfg files 2014-06-09 22:42:55 +00:00
BranchFolding Re-commit: Demote EmitRawText call in AsmPrinter::EmitInlineAsm() and remove hasRawTextSupport() call 2014-02-13 14:44:26 +00:00
CodeExtractor [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
CodeGenPrepare Reduce verbiage of lit.local.cfg files 2014-06-09 22:42:55 +00:00
ConstProp Teach the constant folder to look through bitcast constant expressions 2014-05-15 09:56:28 +00:00
ConstantHoisting [ConstantHoisting][X86] Improve the cost model for small constants with large types (i64 and above). 2014-06-10 00:32:29 +00:00
ConstantMerge Remove the linker_private and linker_private_weak linkages. 2014-03-13 23:18:37 +00:00
CorrelatedValuePropagation [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
DeadArgElim IR: Change inalloca's grammar a bit 2014-03-09 06:41:58 +00:00
DeadStoreElimination Update optimization passes to handle inalloca arguments 2014-01-28 02:38:36 +00:00
DebugIR Use right pointer type in DebugIR 2013-09-27 22:26:25 +00:00
EarlyCSE [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
FunctionAttrs When analyzing params/args for readnone/readonly, don't forget to consider that a pointer argument may be passed through a callsite to the return, and that we may need to analyze it. Fixes a bug reported on llvm-dev: http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-May/073098.html 2014-05-30 02:31:27 +00:00
GCOVProfiling Fix coverage for files with global constructors again. Adds a testcase to the commit from r206671, as requested by David Blaikie. 2014-06-05 04:31:43 +00:00
GVN GVN: Enable value forwarding for calloc 2014-06-12 21:16:19 +00:00
GlobalDCE Allow alias to point to an arbitrary ConstantExpr. 2014-06-03 02:41:57 +00:00
GlobalMerge Global merge for global symbols. 2014-06-11 06:44:53 +00:00
GlobalOpt Allow alias to point to an arbitrary ConstantExpr. 2014-06-03 02:41:57 +00:00
IPConstantProp No need for those tests to go thru llvm-as and/or llvm-dis. 2014-05-27 22:03:28 +00:00
IndVarSimplify ScalarEvolution: Fix handling of AddRecs in isKnownPredicate 2014-05-23 00:06:56 +00:00
Inline Add support for missed and analysis optimization remarks. 2014-05-22 14:19:46 +00:00
InstCombine This removes TODO added in http://reviews.llvm.org/D3658 2014-06-12 14:06:00 +00:00
InstSimplify Teach isKnownNonNull that a nonnull return is not null. Add a test for this case as well as the case of a nonnull attribute (already handled but not tested). 2014-05-20 05:13:21 +00:00
Internalize Fix most of PR10367. 2014-05-16 19:35:39 +00:00
JumpThreading No need for those tests to go thru llvm-as and/or llvm-dis. 2014-05-27 22:03:28 +00:00
LCSSA [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
LICM [LPM] Switch LICM to actively use LCSSA in addition to preserving it. 2014-02-11 12:52:27 +00:00
LoadCombine Add LoadCombine pass. 2014-05-29 01:55:07 +00:00
LoopDeletion [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
LoopIdiom Reduce verbiage of lit.local.cfg files 2014-06-09 22:42:55 +00:00
LoopReroll Fix loop rerolling pass failure with non-consant loop lower bound 2014-01-03 17:20:01 +00:00
LoopRotate [LPM] Fix PR18643, another scary place where loop transforms failed to 2014-01-29 13:16:53 +00:00
LoopSimplify No need for those tests to go thru llvm-as and/or llvm-dis. 2014-05-27 22:03:28 +00:00
LoopStrengthReduce Reduce verbiage of lit.local.cfg files 2014-06-09 22:42:55 +00:00
LoopUnroll Revert r210721 as it causes breakage in internal builds (and possibly GDB). 2014-06-12 18:05:39 +00:00
LoopUnswitch [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
LoopVectorize Reduce verbiage of lit.local.cfg files 2014-06-09 22:42:55 +00:00
LowerAtomic IR: add a second ordering operand to cmpxhg for failure 2014-03-11 10:48:52 +00:00
LowerExpectIntrinsic Lower llvm.expect intrinsic correctly for i1 2014-02-02 22:43:55 +00:00
LowerInvoke Remove LowerInvoke's obsolete "-enable-correct-eh-support" option 2014-03-20 19:54:47 +00:00
LowerSwitch Revert patches to add case-range support for PR1255. 2013-09-09 19:14:35 +00:00
Mem2Reg Debug Info: update testing cases to specify the debug info version number. 2013-11-22 21:49:45 +00:00
MemCpyOpt Treat lifetime.start'd memory like we treat freshly alloca'd memory. Patch by Björn Steinbrink! 2014-03-26 23:45:15 +00:00
MergeFunc Added functions cross-reference test. 2014-06-09 19:03:02 +00:00
MetaRenamer Reject alias to undefined symbols in the verifier. 2014-03-12 20:15:49 +00:00
ObjCARC Fix use_iterator crash in ObjCArc from r203364 2014-03-18 22:32:43 +00:00
PhaseOrdering [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
PruneEH [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
Reassociate [Reassociate] FileCheckize and cleanup a few testcases. No functional change 2014-06-11 18:28:45 +00:00
Reg2Mem [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
SCCP [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
SLPVectorizer Reduce verbiage of lit.local.cfg files 2014-06-09 22:42:55 +00:00
SROA [SROA] Use the correct index integer size in GEPs through non-default 2014-02-26 10:08:16 +00:00
SampleProfile Tolerate unmangled names in sample profiles. 2014-03-18 12:03:12 +00:00
ScalarRepl Fix PR18800. llvm intrinsic memcpy takes 5 arguments void @llvm.memcpy.p0i8.p0i8.i32(i8* <dest>, i8* <src>, i32 <len>, i32 <align>, i1 <isvolatile>).The test case incorrectly uses the old format resulting in isVolatile function in MemIntrinsic to crash during SROA transformation.Modified the test case to use correct signature of memcpy and memset. 2014-03-13 04:50:29 +00:00
Scalarizer Fix Scalarizer insertion point when replacing PHIs with insertelements 2013-12-23 14:51:56 +00:00
SeparateConstOffsetFromGEP/NVPTX Reduce verbiage of lit.local.cfg files 2014-06-09 22:42:55 +00:00
SimplifyCFG Reduce verbiage of lit.local.cfg files 2014-06-09 22:42:55 +00:00
Sink Sink: Don't sink static allocas from the entry block 2014-03-21 15:51:51 +00:00
StripSymbols Add a debug info code generation level to the compile unit metadata 2014-02-27 01:24:56 +00:00
StructurizeCFG StructurizeCFG: Fix verification failure with some loops. 2013-11-22 19:24:39 +00:00
TailCallElim Improve 'tail' call marking in TRE. A bootstrap of clang goes from 375k calls marked tail in the IR to 470k, however this improvement does not carry into an improvement of the call/jmp ratio on x86. The most common pattern is a tail call + br to a block with nothing but a 'ret'. 2014-05-05 23:59:03 +00:00
TailDup Reduce verbiage of lit.local.cfg files 2014-06-09 22:42:55 +00:00