[ms-inline asm] Handle the enumeration of input and output expressions in a

more robust way to address a few FIXMEs.

The initial implementation, r163342, built the IR asm string and then tried to
patch things on the fly without enough context.  Specifically, it didn't skip
mnemonics nor did it track with assembly instruction an expression was related
to.  The new implementation patches the operands and then builds the final
IR string.

llvm-svn: 163756

1 files changed, 13 insertions, 0 deletions

diff --git a/clang/test/CodeGen/ms-inline-asm.c b/clang/test/CodeGen/ms-inline-asm.c
index b08f869ac44..b6bc3853f5c 100644
--- a/clang/test/CodeGen/ms-inline-asm.c
+++ b/clang/test/CodeGen/ms-inline-asm.c
@@ -151,3 +151,16 @@ void t18(void) {
 // CHECK: t18
 // CHECK: call void asm sideeffect inteldialect "mov dword ptr [eax], eax", "~{dirflag},~{fpsr},~{flags}"() nounwind
 }
+
+unsigned t19(void) {
+  unsigned i = 1, j, l = 1, m;
+  __asm {
+    mov eax, i
+    mov j, eax
+    mov eax, l
+    mov m, eax
+  }
+  return j + m;
+// CHECK: t19
+// CHECK: call { i32, i32 } asm sideeffect inteldialect "mov eax, $2\0A\09mov $0, eax\0A\09mov eax, $3\0A\09mov $1, eax", "=r,=r,r,r,~{eax},~{dirflag},~{fpsr},~{flags}"(i32 %{{.*}}, i32 %{{.*}}) nounwind
+}