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| author | Chris Lattner <sabre@nondot.org> | 2001-07-14 06:11:51 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2001-07-14 06:11:51 +0000 |
| commit | 3b7bfdb201fadea61639dee8f4de4181d745e858 (patch) | |
| tree | 91e7e1fbf7e85a02da1336c98648aebdc787ff31 /lib | |
| parent | 20a155f5ab9f9021f04fc672ae44cd0845793371 (diff) | |
| download | llvm-3b7bfdb201fadea61639dee8f4de4181d745e858.tar.gz llvm-3b7bfdb201fadea61639dee8f4de4181d745e858.tar.bz2 llvm-3b7bfdb201fadea61639dee8f4de4181d745e858.tar.xz | |
Add knowledge about the struct form of the GetElementPtr instruction
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Transforms/Scalar/SCCP.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/SCCP.cpp b/lib/Transforms/Scalar/SCCP.cpp index 79d90e6532..63ce512508 100644 --- a/lib/Transforms/Scalar/SCCP.cpp +++ b/lib/Transforms/Scalar/SCCP.cpp @@ -23,6 +23,7 @@ #include "llvm/ConstantPool.h" #include "llvm/InstrTypes.h" #include "llvm/iOther.h" +#include "llvm/iMemory.h" #include "llvm/iTerminators.h" #include "llvm/Tools/STLExtras.h" #include "llvm/Assembly/Writer.h" @@ -429,8 +430,13 @@ void SCCP::UpdateInstruction(Instruction *I) { //===-------------------------------------------------------------------===// // Handle Unary instructions... + // Also treated as unary here, are cast instructions and getelementptr + // instructions on struct* operands. // - if (I->isUnaryOp() || I->getOpcode() == Instruction::Cast) { + if (I->isUnaryOp() || I->getOpcode() == Instruction::Cast || + (I->getOpcode() == Instruction::GetElementPtr && + ((GetElementPtrInst*)I)->isStructSelector())) { + Value *V = I->getOperand(0); InstVal &VState = getValueState(V); if (VState.isOverdefined()) { // Inherit overdefinedness of operand |