1 files changed, 24 insertions, 0 deletions
diff --git a/test/CodeGen/x86_32-inline-asm.c b/test/CodeGen/x86_32-inline-asm.c
new file mode 100644
index 0000000..473f78e
--- /dev/null
+++ b/test/CodeGen/x86_32-inline-asm.c
@@ -0,0 +1,24 @@
+// RUN: %clang_cc1 -triple i386-apple-darwin9 -verify %s
+// <rdar://problem/12415959>
+
+typedef unsigned int u_int32_t;
+typedef u_int32_t uint32_t;
+
+typedef unsigned long long u_int64_t;
+typedef u_int64_t uint64_t;
+
+int func1() {
+  // Error out if size is > 32-bits.
+  uint32_t msr = 0x8b;
+  uint64_t val = 0;
+  __asm__ volatile("wrmsr"
+                   :
+                   : "c" (msr),
+                     "a" ((val & 0xFFFFFFFFUL)), // expected-error {{invalid input size for constraint 'a'}}
+                     "d" (((val >> 32) & 0xFFFFFFFFUL)));
+
+  // Don't error out if the size of the destination is <= 32 bits.
+  unsigned char data;
+  unsigned int port;
+  __asm__ volatile("outb %0, %w1" : : "a" (data), "Nd" (port)); // No error expected.
+}