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InstCombine transforms A *nsw B +nsw A *nsw C to A *nsw (B + C). This is incorrect -- e.g. if A = -1, B = 1, C = INT_SMAX. Then nothing in the LHS overflows, but the multiplication in RHS overflows. We need to first make sure that we won't multiple by INT_SMAX + 1. Test case `add_of_mul` contributed by Sanjoy Das. This fixes PR23635. Differential Revision: http://reviews.llvm.org/D9629 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238066 91177308-0d34-0410-b5e6-96231b3b80d8 |
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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 | ||
InstCombineVectorOps.cpp | ||
InstructionCombining.cpp | ||
LLVMBuild.txt | ||
Makefile |