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Erik Verbruggen e2d437148a GVN: merge overflow intrinsics with non-overflow instructions. 
When an overflow intrinsic is followed by a non-overflow instruction,
replace the latter with an extract. For example:

  %sadd = tail call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 %a, i32 %b)
  %sadd3 = add i32 %a, %b

Here the add statement will be replaced by an extract.

When an overflow intrinsic follows a non-overflow instruction, a clone
of the intrinsic is inserted before the normal instruction, which makes
it the same as the previous case. Subsequent runs of GVN can then clean
up the duplicate instructions and insert the extract.

This fixes PR8817.

llvm-svn: 203553
 		2014-03-11 09:36:48 +00:00
..
ADCE [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
AddDiscriminators Pass to emit DWARF path discriminators. 2014-03-03 20:06:11 +00:00
ArgumentPromotion Update optimization passes to handle inalloca arguments 2014-01-28 02:38:36 +00:00
BBVectorize Change math intrinsic attributes from readonly to readnone. These 2014-03-06 00:18:15 +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 Revert r203230, "CodeGenPrep: sink extends of illegal types into use block." 2014-03-09 11:01:07 +00:00
ConstProp Teach ConstantFolding about pointer address spaces 2013-08-20 21:20:04 +00:00
ConstantHoisting/X86 [Constant Hoisting] Fix insertion point for constant materialization. 2014-02-08 00:20:49 +00:00
ConstantMerge Corruptly merge constants with explicit and implicit alignments. 2013-11-12 20:21:43 +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 Update optimization passes to handle inalloca arguments 2014-01-28 02:38:36 +00:00
GCOVProfiling Debug Info: update testing cases to specify the debug info version number. 2013-11-22 21:49:45 +00:00
GVN GVN: merge overflow intrinsics with non-overflow instructions. 2014-03-11 09:36:48 +00:00
GlobalDCE [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
GlobalOpt GlobalOpt: Apply fastcc to internal x86_thiscallcc functions 2014-02-26 19:57:30 +00:00
IPConstantProp [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
IndVarSimplify [LPM] Fix PR18642, a pretty nasty bug in IndVars that "never mattered" 2014-01-29 04:40:19 +00:00
Inline Set default of inlinecold-threshold to 225. 2014-02-06 01:59:22 +00:00
InstCombine For functions with ARM target specific calling convention, when simplify-libcall 2014-03-10 20:49:45 +00:00
InstSimplify InstSimplify: Make shift, select and GEP simplifications vector-aware. 2014-01-24 17:09:53 +00:00
Internalize Correct word hyphenations 2013-12-05 05:44:44 +00:00
JumpThreading Don't eliminate a partially redundant load if it's in a landing pad. 2013-10-21 04:09:17 +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
LoopDeletion [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
LoopIdiom Debug Info: update testing cases to specify the debug info version number. 2013-11-23 01:16:29 +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 [LPM] Switch LICM to actively use LCSSA in addition to preserving it. 2014-02-11 12:52:27 +00:00
LoopStrengthReduce Fix PR18165: LSR must avoid scaling factors that exceed the limit on truncated use. 2014-02-26 16:31:56 +00:00
LoopUnroll Implement TTI getUnrollingPreferences for PowerPC 2013-09-11 21:20:40 +00:00
LoopUnswitch [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
LoopVectorize LoopVectorizer: Preserve fast-math flags 2014-03-05 21:10:47 +00:00
LowerAtomic [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
LowerExpectIntrinsic Lower llvm.expect intrinsic correctly for i1 2014-02-02 22:43:55 +00:00
LowerInvoke [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +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 MemCpyOpt: When merging memsets also merge the trivial case of two memsets with the same destination. 2014-03-10 21:05:13 +00:00
MergeFunc PR17925 bugfix. 2013-11-26 16:11:03 +00:00
MetaRenamer [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
ObjCARC Fix known typos 2014-01-24 17:20:08 +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 [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +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 Trivial test commit. 2014-03-05 02:09:51 +00:00
SROA [SROA] Use the correct index integer size in GEPs through non-default 2014-02-26 10:08:16 +00:00
SampleProfile Use discriminator information in sample profiles. 2014-03-10 22:41:28 +00:00
ScalarRepl Debug Info: update testing cases to specify the debug info version number. 2013-11-22 21:49:45 +00:00
Scalarizer Fix Scalarizer insertion point when replacing PHIs with insertelements 2013-12-23 14:51:56 +00:00
SimplifyCFG Allow speculating llvm.sqrt, fma and fmuladd 2014-01-31 00:09:00 +00:00
Sink [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +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 [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
TailDup [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00