[llvm-commits] [llvm] r114767 - /llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

[John Thompson]

Author: jtsoftware
Date: Fri Sep 24 17:24:05 2010
New Revision: 114767

URL: http://llvm.org/viewvc/llvm-project?rev=114767&view=rev
Log:
Fix for test/CodeGen/PowerPC/2008-10-17-AsmMatchingOperands.ll crash.

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp?rev=114767&r1=114766&r2=114767&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp Fri Sep 24 17:24:05 2010
@@ -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);