Fix for test/CodeGen/PowerPC/2008-10-17-AsmMatchingOperands.ll crash.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114767 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index d971db5..c316ef6 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -5434,6 +5434,26 @@
for (unsigned i = 0, e = ConstraintOperands.size(); i != e; ++i) {
SDISelAsmOperandInfo &OpInfo = ConstraintOperands[i];
+ // If this is an output operand with a matching input operand, look up the
+ // matching input. If their types mismatch, e.g. one is an integer, the
+ // other is floating point, or their sizes are different, flag it as an
+ // error.
+ if (OpInfo.hasMatchingInput()) {
+ SDISelAsmOperandInfo &Input = ConstraintOperands[OpInfo.MatchingInput];
+
+ if (OpInfo.ConstraintVT != Input.ConstraintVT) {
+ if ((OpInfo.ConstraintVT.isInteger() !=
+ Input.ConstraintVT.isInteger()) ||
+ (OpInfo.ConstraintVT.getSizeInBits() !=
+ Input.ConstraintVT.getSizeInBits())) {
+ report_fatal_error("Unsupported asm: input constraint"
+ " with a matching output constraint of"
+ " incompatible type!");
+ }
+ Input.ConstraintVT = OpInfo.ConstraintVT;
+ }
+ }
+
// Compute the constraint code and ConstraintType to use.
TLI.ComputeConstraintToUse(OpInfo, OpInfo.CallOperand, &DAG);