diff options
| -rw-r--r-- | clang/lib/Basic/TargetInfo.cpp | 3 | ||||
| -rw-r--r-- | clang/test/CodeGen/asm.c | 9 |
2 files changed, 12 insertions, 0 deletions
diff --git a/clang/lib/Basic/TargetInfo.cpp b/clang/lib/Basic/TargetInfo.cpp index 35d9ccd401d..9cd12493e7a 100644 --- a/clang/lib/Basic/TargetInfo.cpp +++ b/clang/lib/Basic/TargetInfo.cpp @@ -188,6 +188,9 @@ bool TargetInfo::validateOutputConstraint(ConstraintInfo &Info) const { } case '&': // early clobber. break; + case '%': // commutative. + // FIXME: Check that there is a another register after this one. + break; case 'r': // general register. Info.setAllowsRegister(); break; diff --git a/clang/test/CodeGen/asm.c b/clang/test/CodeGen/asm.c index 46563213b1e..52afc915274 100644 --- a/clang/test/CodeGen/asm.c +++ b/clang/test/CodeGen/asm.c @@ -101,3 +101,12 @@ void t14(struct S *P) { } +// PR4938 +int t16() { + int a,b; + asm ( "nop;" + :"=%c" (a) + : "r" (b) + ); + return 0; +} |
