Fail early with a clear assert if an operation with multiple uses somehow ends
up being contracted during codegen.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165197 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExprScalar.cpp b/lib/CodeGen/CGExprScalar.cpp
index 0d68ff5..0e8afb0 100644
--- a/lib/CodeGen/CGExprScalar.cpp
+++ b/lib/CodeGen/CGExprScalar.cpp
@@ -2045,11 +2045,15 @@
// We have a potentially fusable op. Look for a mul on one of the operands.
if (llvm::BinaryOperator* LHSBinOp = dyn_cast<llvm::BinaryOperator>(op.LHS)) {
if (LHSBinOp->getOpcode() == llvm::Instruction::FMul) {
+ assert(LHSBinOp->getNumUses() == 0 &&
+ "Operations with multiple uses shouldn't be contracted.");
return buildFMulAdd(LHSBinOp, op.RHS, CGF, Builder, false, isSub);
}
} else if (llvm::BinaryOperator* RHSBinOp =
dyn_cast<llvm::BinaryOperator>(op.RHS)) {
if (RHSBinOp->getOpcode() == llvm::Instruction::FMul) {
+ assert(RHSBinOp->getNumUses() == 0 &&
+ "Operations with multiple uses shouldn't be contracted.");
return buildFMulAdd(RHSBinOp, op.LHS, CGF, Builder, isSub, false);
}
}