diff options
Diffstat (limited to 'clang/test/CodeGen/asm-reg-var-local.c')
| -rw-r--r-- | clang/test/CodeGen/asm-reg-var-local.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/clang/test/CodeGen/asm-reg-var-local.c b/clang/test/CodeGen/asm-reg-var-local.c index 9060e120ffc..44417d4a76b 100644 --- a/clang/test/CodeGen/asm-reg-var-local.c +++ b/clang/test/CodeGen/asm-reg-var-local.c @@ -2,6 +2,7 @@ // Exercise various use cases for local asm "register variables". int foo() { +// CHECK-LABEL: define i32 @foo() // CHECK: [[A:%[a-zA-Z0-9]+]] = alloca i32 register int a asm("rsi")=5; @@ -22,3 +23,26 @@ int foo() { // CHECK: [[TMP1:%[a-zA-Z0-9]+]] = load i32* [[A]] // CHECK: ret i32 [[TMP1]] } + +int earlyclobber() { +// CHECK-LABEL: define i32 @earlyclobber() +// CHECK: [[A:%[a-zA-Z0-9]+]] = alloca i32 + + register int a asm("rsi")=5; +// CHECK: store i32 5, i32* [[A]] + + asm volatile("; %0 This asm defines rsi" : "=&r"(a)); +// CHECK: [[Z:%[a-zA-Z0-9]+]] = call i32 asm sideeffect "; $0 This asm defines rsi", "=&{rsi},~{dirflag},~{fpsr},~{flags}"() +// CHECK: store i32 [[Z]], i32* [[A]] + + a = 42; +// CHECK: store i32 42, i32* [[A]] + + asm volatile("; %0 This asm uses rsi" : : "r"(a)); +// CHECK: [[TMP:%[a-zA-Z0-9]+]] = load i32* [[A]] +// CHECK: call void asm sideeffect "; $0 This asm uses rsi", "{rsi},~{dirflag},~{fpsr},~{flags}"(i32 [[TMP]]) + + return a; +// CHECK: [[TMP1:%[a-zA-Z0-9]+]] = load i32* [[A]] +// CHECK: ret i32 [[TMP1]] +} |
