forked from OSchip/llvm-project
36e03ac6ee
This fixes https://bugs.llvm.org/show_bug.cgi?id=39908. The evaluateGEPOffsetExpression() function simplifies GEP offsets for use in comparisons against zero, basically by converting X*Scale+Offset==0 to X+Offset/Scale==0 if Scale divides Offset. However, before this is done, Offset is masked down to the pointer size. This results in incorrect results for negative Offsets, because we basically end up dividing the 32-bit offset *zero* extended to 64-bit bits (rather than sign extended). Fix this by explicitly sign extending the truncated value. Differential Revision: https://reviews.llvm.org/D55449 llvm-svn: 348987 |
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| .. | ||
| CMakeLists.txt | ||
| InstCombineAddSub.cpp | ||
| InstCombineAndOrXor.cpp | ||
| InstCombineCalls.cpp | ||
| InstCombineCasts.cpp | ||
| InstCombineCompares.cpp | ||
| InstCombineInternal.h | ||
| InstCombineLoadStoreAlloca.cpp | ||
| InstCombineMulDivRem.cpp | ||
| InstCombinePHI.cpp | ||
| InstCombineSelect.cpp | ||
| InstCombineShifts.cpp | ||
| InstCombineSimplifyDemanded.cpp | ||
| InstCombineTables.td | ||
| InstCombineVectorOps.cpp | ||
| InstructionCombining.cpp | ||
| LLVMBuild.txt | ||