[Clang] Fix crash for incompatible types in inline assembly

Author: AdUhTkJm

clang/lib/Sema/SemaStmtAsm.cpp

@@ -668,6 +668,7 @@ StmtResult Sema::ActOnGCCAsmStmt(SourceLocation AsmLoc, bool IsSimple,
     // output was a register, just extend the shorter one to the size of the
     // larger one.
     if (!SmallerValueMentioned && InputDomain != AD_Other &&
+        InputDomain == OutputDomain &&
         OutputConstraintInfos[TiedTo].allowsRegister()) {
       // FIXME: GCC supports the OutSize to be 128 at maximum. Currently codegen
       // crash when the size larger than the register size. So we limit it here.

clang/test/Sema/inline-asm-incompatible-types.c

@@ -0,0 +1,19 @@
+extern __inline  double
+fabs (char  __x)
+{
+  register double __value;
+  __asm __volatile__
+    ("fabs"
+     : "=t" (__value) : "0" (__x));
+  return __value;
+}
+int
+foo ()
+{
+  int i, j, k;
+  double x = 0, y = ((i == j) ? 1 : 0);
+  for (i = 0; i < 10; i++)
+    ;
+  fabs (x - y);
+  return 0;
+}