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-rw-r--r--lib/Basic/Targets.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index 78a43d9f54..531d0520cc 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -438,6 +438,7 @@ X86TargetInfo::validateAsmConstraint(char c,
case 'u': // second from top of floating point stack.
case 'q': // Any register accessible as [r]l: a, b, c, and d.
case 'y': // Any MMX register.
+ case 'x': // Any SSE register.
case 'Q': // Any register accessible as [r]h: a, b, c, and d.
case 'Z': // 32-bit integer constant for use with zero-extending x86_64
// instructions.