diff options
author | Anders Carlsson <andersca@mac.com> | 2010-11-03 02:54:51 +0000 |
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committer | Anders Carlsson <andersca@mac.com> | 2010-11-03 02:54:51 +0000 |
commit | 79ca1ee4b637c01458584bb571f1b309180c780d (patch) | |
tree | 7a8af4f17c412bc6ef43d7d0a0340076a64d3b92 /lib/Basic/TargetInfo.cpp | |
parent | 86eda39c8af47280273758debf0432933bdeee3c (diff) |
When setting a tied check if it's already tied. If it's tied to another constraint it's invalid. Fixes PR3905.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@118146 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Basic/TargetInfo.cpp')
-rw-r--r-- | lib/Basic/TargetInfo.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/Basic/TargetInfo.cpp b/lib/Basic/TargetInfo.cpp index 947cbfc3f6..1437a4ba01 100644 --- a/lib/Basic/TargetInfo.cpp +++ b/lib/Basic/TargetInfo.cpp @@ -354,6 +354,11 @@ bool TargetInfo::validateInputConstraint(ConstraintInfo *OutputConstraints, if (OutputConstraints[i].isReadWrite()) return false; + // If the constraint is already tied, it must be tied to the + // same operand referenced to by the number. + if (Info.hasTiedOperand() && Info.getTiedOperand() != i) + return false; + // The constraint should have the same info as the respective // output constraint. Info.setTiedOperand(i, OutputConstraints[i]); @@ -369,6 +374,11 @@ bool TargetInfo::validateInputConstraint(ConstraintInfo *OutputConstraints, if (!resolveSymbolicName(Name, OutputConstraints, NumOutputs, Index)) return false; + // If the constraint is already tied, it must be tied to the + // same operand referenced to by the number. + if (Info.hasTiedOperand() && Info.getTiedOperand() != Index) + return false; + Info.setTiedOperand(Index, OutputConstraints[Index]); break; } |