1// RUN: %clang_cc1 %s -triple x86_64-apple-darwin -emit-llvm -o - | FileCheck %s 2// Exercise various use cases for local asm "register variables". 3 4int foo() { 5// CHECK: [[A:%[a-zA-Z0-9]+]] = alloca i32 6 7 register int a asm("rsi")=5; 8// CHECK: store i32 5, i32* [[A]] 9 10 asm volatile("; %0 This asm defines rsi" : "=r"(a)); 11// CHECK: [[Z:%[a-zA-Z0-9]+]] = call i32 asm sideeffect "; $0 This asm defines rsi", "={rsi},~{dirflag},~{fpsr},~{flags}"() 12// CHECK: store i32 [[Z]], i32* [[A]] 13 14 a = 42; 15// CHECK: store i32 42, i32* [[A]] 16 17 asm volatile("; %0 This asm uses rsi" : : "r"(a)); 18// CHECK: [[TMP:%[a-zA-Z0-9]+]] = load i32* [[A]] 19// CHECK: call void asm sideeffect "; $0 This asm uses rsi", "{rsi},~{dirflag},~{fpsr},~{flags}"(i32 [[TMP]]) 20 21 return a; 22// CHECK: [[TMP1:%[a-zA-Z0-9]+]] = load i32* [[A]] 23// CHECK: ret i32 [[TMP1]] 24} 25