fix a crash in SCCP handling extractvalue of an array, pointed out and
tracked down by Stephan Reiter!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86726 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/SCCP.cpp b/lib/Transforms/Scalar/SCCP.cpp
index 509a6db..c202a2c 100644
--- a/lib/Transforms/Scalar/SCCP.cpp
+++ b/lib/Transforms/Scalar/SCCP.cpp
@@ -795,9 +795,14 @@
return markOverdefined(&EVI);
Value *AggVal = EVI.getAggregateOperand();
- unsigned i = *EVI.idx_begin();
- LatticeVal EltVal = getStructValueState(AggVal, i);
- mergeInValue(getValueState(&EVI), &EVI, EltVal);
+ if (isa<StructType>(AggVal->getType())) {
+ unsigned i = *EVI.idx_begin();
+ 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) {
diff --git a/test/Transforms/SCCP/crash.ll b/test/Transforms/SCCP/crash.ll
index e34eaca..2f6da1d 100644
--- a/test/Transforms/SCCP/crash.ll
+++ b/test/Transforms/SCCP/crash.ll
@@ -22,3 +22,8 @@
return:
ret void
}
+
+define i32 @test2([4 x i32] %A) {
+ %B = extractvalue [4 x i32] %A, 1
+ ret i32 %B
+}