David Majnemer b21b529990 [InstCombine] Don't miscompile select to poison ... If we have (select a, b, c), it is sometimes valid to simplify this to a single select operand. However, doing so is only valid if the computation doesn't inject poison into the computation. It might be helpful to consider the following example: (select (icmp ne %i, INT_MAX), (add nsw %i, 1), INT_MIN) The select is equivalent to (add %i, 1) but not (add nsw %i, 1). Self hosting on x86_64 revealed that this occurs very, very rarely so bailing out is hopefully pretty reasonable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239215 91177308-0d34-0410-b5e6-96231b3b80d8		2015-06-06 02:30:43 +00:00
..
CMakeLists.txt
InstCombineAddSub.cpp	[ValueTracking] refactor: extract method haveNoCommonBitsSet	2015-05-14 23:53:19 +00:00
InstCombineAndOrXor.cpp	[ConstantRange] Split makeICmpRegion in two.	2015-03-18 00:41:24 +00:00
InstCombineCalls.cpp	[InstSimplify] Handle some overflow intrinsics in InstSimplify	2015-05-22 03:56:46 +00:00
InstCombineCasts.cpp	Reapply r237539 with a fix for the Chromium build.	2015-05-20 18:41:25 +00:00
InstCombineCompares.cpp	[InstCombine][NFC] Add a `break;` statement.	2015-06-05 18:04:46 +00:00
InstCombineInternal.h	Rip min/max pattern matching out of InstCombine and into	2015-05-11 14:42:20 +00:00
InstCombineLoadStoreAlloca.cpp	[InstCombine] Fold IntToPtr and PtrToInt into preceding loads.	2015-05-28 18:39:17 +00:00
InstCombineMulDivRem.cpp	[InstCombine] (mul nsw 1, INT_MIN) != (shl nsw 1, 31)	2015-04-18 04:41:30 +00:00
InstCombinePHI.cpp	Convert PHI getIncomingValue() to foreach over incoming_values(). NFC.	2015-05-12 20:05:31 +00:00
InstCombineSelect.cpp	[InstCombine] Don't miscompile select to poison	2015-06-06 02:30:43 +00:00
InstCombineShifts.cpp	Convert PHI getIncomingValue() to foreach over incoming_values(). NFC.	2015-05-12 20:05:31 +00:00
InstCombineSimplifyDemanded.cpp	Reapply r237539 with a fix for the Chromium build.	2015-05-20 18:41:25 +00:00
InstCombineVectorOps.cpp	[InstCombine] Use DataLayout to determine vector element width	2015-04-03 20:18:40 +00:00
InstructionCombining.cpp	Replace push_back(Constructor(foo)) with emplace_back(foo) for non-trivial types	2015-05-29 19:43:39 +00:00
LLVMBuild.txt
Makefile