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// RUN: %clang_cc1 %s -triple x86_64-apple-darwin -emit-llvm -o - | FileCheck %s
// Exercise various use cases for local asm "register variables".
int foo() {
// CHECK: %a = alloca i32
register int a asm("rsi")=5;
// CHECK: store i32 5, i32* %a
asm volatile("; %0 This asm defines rsi" : "=r"(a));
// CHECK: %0 = call i32 asm sideeffect "; $0 This asm defines rsi", "={rsi},~{dirflag},~{fpsr},~{flags}"()
// CHECK: store i32 %0, i32* %a
a = 42;
// CHECK: store i32 42, i32* %a
asm volatile("; %0 This asm uses rsi" : : "r"(a));
// CHECK: %tmp = load i32* %a
// CHECK: call void asm sideeffect "; $0 This asm uses rsi", "{rsi},~{dirflag},~{fpsr},~{flags}"(i32 %tmp)
return a;
// CHECK: %tmp1 = load i32* %a
// CHECK: ret i32 %tmp1
}
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