Testcase for llvm checkin 112674.

llvm-svn: 112675

1 files changed, 32 insertions, 0 deletions

diff --git a/llvm/test/FrontendC/asm-reg-var-local.c b/llvm/test/FrontendC/asm-reg-var-local.c
new file mode 100644
index 00000000000..c3b6c4b1b51
--- /dev/null
+++ b/llvm/test/FrontendC/asm-reg-var-local.c
@@ -0,0 +1,32 @@
+// RUN: %llvmgcc %s -m64 -S -o - | FileCheck %s
+// Exercise various use cases for local asm "register variables".
+// XFAIL: *
+// XTARGET: x86_64
+
+int foo() {
+// CHECK: %a = alloca i32
+
+  register int a asm("rsi")=5;
+// CHECK: store i32 5, i32* %a, align 4
+
+  asm volatile("; %0 This asm defines rsi" : "=r"(a));
+// CHECK: %asmtmp = call i32 asm sideeffect "; $0 This asm defines rsi", "={rsi}
+// CHECK: store i32 %asmtmp, i32* %a
+
+  a = 42;
+// CHECK:  store i32 42, i32* %a, align 4
+
+  asm volatile("; %0 This asm uses rsi" : : "r"(a));
+// CHECK:  %1 = load i32* %a, align 4                    
+// CHECK:  call void asm sideeffect "", "{rsi}"(i32 %1) nounwind
+// CHECK:  %2 = call i32 asm sideeffect "", "={rsi}"() nounwind
+// CHECK:  call void asm sideeffect "; $0 This asm uses rsi", "{rsi},~{dirflag},~{fpsr},~{flags}"(i32 %2)
+
+  return a;
+// CHECK:  %3 = load i32* %a, align 4
+// CHECK:  call void asm sideeffect "", "{rsi}"(i32 %3) nounwind
+// CHECK:  %4 = call i32 asm sideeffect "", "={rsi}"() nounwind 
+// CHECK:  store i32 %4, i32* %0, align 4
+// CHECK:  %5 = load i32* %0, align 4                     
+// CHECK:  store i32 %5, i32* %retval, align 4
+}