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fix a crash in SCCP handling extractvalue of an array, pointed out and 

tracked down by Stephan Reiter!

llvm-svn: 86726
This commit is contained in:
Chris Lattner 2009-11-10 22:02:09 +00:00
parent 4453dc976b
commit 02e2cee7dc
2 changed files with 13 additions and 3 deletions
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11
llvm/lib/Transforms/Scalar/SCCP.cpp
View File

@ -795,9 +795,14 @@ void SCCPSolver::visitExtractValueInst(ExtractValueInst &EVI) {
return markOverdefined(&EVI); return markOverdefined(&EVI);
Value *AggVal = EVI.getAggregateOperand(); Value *AggVal = EVI.getAggregateOperand();
unsigned i = *EVI.idx_begin(); if (isa<StructType>(AggVal->getType())) {
LatticeVal EltVal = getStructValueState(AggVal, i); unsigned i = *EVI.idx_begin();
mergeInValue(getValueState(&EVI), &EVI, EltVal); LatticeVal EltVal = getStructValueState(AggVal, i);
mergeInValue(getValueState(&EVI), &EVI, EltVal);
} else {
// Otherwise, must be extracting from an array.
return markOverdefined(&EVI);
}
} }
void SCCPSolver::visitInsertValueInst(InsertValueInst &IVI) { void SCCPSolver::visitInsertValueInst(InsertValueInst &IVI) {

5
llvm/test/Transforms/SCCP/crash.ll
View File

@ -22,3 +22,8 @@ bb34:
return: return:
ret void ret void
} }
define i32 @test2([4 x i32] %A) {
%B = extractvalue [4 x i32] %A, 1
ret i32 %B
}