Jim Grosbach cbf676b3ba float comparison to double 'zero' constant can just be a float 'zero.' ...

InstCombine was incorrectly considering the conversion of the constant
zero to be unsafe.

We want to transform:
define float @bar(float %x) nounwind readnone optsize ssp {
  %conv = fpext float %x to double
  %cmp = fcmp olt double %conv, 0.000000e+00
  %conv1 = zext i1 %cmp to i32
  %conv2 = sitofp i32 %conv1 to float
  ret float %conv2
}

Into:
define float @bar(float %x) nounwind readnone optsize ssp {
  %cmp = fcmp olt float %x, 0.000000e+00   ; <---- This
  %conv1 = zext i1 %cmp to i32
  %conv2 = sitofp i32 %conv1 to float
  ret float %conv2
}


rdar://10215914


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140869 91177308-0d34-0410-b5e6-96231b3b80d8

2011-09-30 18:45:50 +00:00

..

CMakeLists.txt

Rewrite the CMake build to use explicit dependencies between libraries,

2011-07-29 00:14:25 +00:00

InstCombine.h

Inlining often produces landingpad instructions with repeated

2011-09-30 13:12:16 +00:00

InstCombineAddSub.cpp

land David Blaikie's patch to de-constify Type, with a few tweaks.

2011-07-18 04:54:35 +00:00

InstCombineAndOrXor.cpp

Stop emitting instructions with the name "tmp" they eat up memory and have to be uniqued, without any benefit.

2011-09-27 20:39:19 +00:00

InstCombineCalls.cpp

Stop emitting instructions with the name "tmp" they eat up memory and have to be uniqued, without any benefit.

2011-09-27 20:39:19 +00:00

InstCombineCasts.cpp

Stop emitting instructions with the name "tmp" they eat up memory and have to be uniqued, without any benefit.

2011-09-27 20:39:19 +00:00

InstCombineCompares.cpp

float comparison to double 'zero' constant can just be a float 'zero.'

2011-09-30 18:45:50 +00:00

InstCombineLoadStoreAlloca.cpp

Use the getFirstInsertionPt() method instead of getFirstNonPHI + an 'isa<>'

2011-08-16 20:45:24 +00:00

InstCombineMulDivRem.cpp

Stop emitting instructions with the name "tmp" they eat up memory and have to be uniqued, without any benefit.

2011-09-27 20:39:19 +00:00

InstCombinePHI.cpp

Update instcombine for atomic load/store.

2011-08-15 22:09:40 +00:00

InstCombineSelect.cpp

Clean up includes of llvm/Analysis/ConstantFolding.h so it's included where it's used and not included where it isn't.

2011-07-20 21:57:23 +00:00

InstCombineShifts.cpp

Make sure to correctly clear the exact/nuw/nsw flags off of shifts when they are combined together. <rdar://problem/9859829>

2011-07-29 00:18:19 +00:00

InstCombineSimplifyDemanded.cpp

Stop emitting instructions with the name "tmp" they eat up memory and have to be uniqued, without any benefit.

2011-09-27 20:39:19 +00:00

InstCombineVectorOps.cpp

land David Blaikie's patch to de-constify Type, with a few tweaks.

2011-07-18 04:54:35 +00:00

InstCombineWorklist.h

InstCombine: We know the number of items initially added to the worklist map, reserve space early to avoid rehashing.

2011-03-05 16:43:46 +00:00

InstructionCombining.cpp

Inlining often produces landingpad instructions with repeated

2011-09-30 13:12:16 +00:00

Makefile

make -fno-rtti the default unless a directory builds with REQUIRES_RTTI.

2010-01-24 20:43:08 +00:00