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authorAnders Carlsson <andersca@mac.com>2010-11-03 02:22:29 +0000
committerAnders Carlsson <andersca@mac.com>2010-11-03 02:22:29 +0000
commit86eda39c8af47280273758debf0432933bdeee3c (patch)
tree5532cf78d3a87a350e8157695394aa9056f4d02a /lib/Basic/TargetInfo.cpp
parent7533a5b65f81a4eed1e0f0afeb859e26bc0c056b (diff)
A number in an input constraint can't point to a read-write ('+') constraint. Fixes PR3904.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@118145 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Basic/TargetInfo.cpp')
-rw-r--r--lib/Basic/TargetInfo.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Basic/TargetInfo.cpp b/lib/Basic/TargetInfo.cpp
index 6ef306d27e..947cbfc3f6 100644
--- a/lib/Basic/TargetInfo.cpp
+++ b/lib/Basic/TargetInfo.cpp
@@ -350,6 +350,10 @@ bool TargetInfo::validateInputConstraint(ConstraintInfo *OutputConstraints,
if (i >= NumOutputs)
return false;
+ // A number must refer to an output only operand.
+ if (OutputConstraints[i].isReadWrite())
+ return false;
+
// The constraint should have the same info as the respective
// output constraint.
Info.setTiedOperand(i, OutputConstraints[i]);