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 4 int 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
