Vendor import of clang trunk r238337:

https://llvm.org/svn/llvm-project/cfe/trunk@238337

1 files changed, 11 insertions, 0 deletions

diff --git a/test/CodeGen/inline-asm-matching-constraint.c b/test/CodeGen/inline-asm-matching-constraint.c
new file mode 100644
index 0000000..45c387f
--- /dev/null
+++ b/test/CodeGen/inline-asm-matching-constraint.c
@@ -0,0 +1,11 @@
+// RUN: %clang_cc1 -emit-llvm %s -o - -triple powerpc64le-linux-gnu | FileCheck %s
+// Sadly since this requires a register constraint to trigger we have to set
+// a target here.
+void a(void) {
+  register unsigned long __sc_0 __asm__("r0");
+  __asm__ __volatile__("mfcr %0" : "=&r"(__sc_0) : "0"(__sc_0));
+}
+
+// Check that we can generate code for this correctly. The matching input
+// constraint should not have an early clobber on it.
+// CHECK: call i64 asm sideeffect "mfcr $0", "=&{r0},{r0}"