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// RUN: %llvmgcc %s -S -o - | FileCheck %s
// Exercise various use cases for local asm "register variables".
// XFAIL: *
// XTARGET: x86_64,i686,i386
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: %1 = call i32 asm sideeffect "; $0 This asm defines rsi", "={rsi}
// CHECK: store i32 %1, i32* %a
a = 42;
// CHECK: store i32 42, i32* %a, align 4
asm volatile("; %0 This asm uses rsi" : : "r"(a));
// CHECK: %2 = load i32* %a, align 4
// CHECK: call void asm sideeffect "", "{rsi}"(i32 %2) nounwind
// CHECK: %3 = call i32 asm sideeffect "", "={rsi}"() nounwind
// CHECK: call void asm sideeffect "; $0 This asm uses rsi", "{rsi},~{dirflag},~{fpsr},~{flags}"(i32 %3)
return a;
// CHECK: %4 = load i32* %a, align 4
// CHECK: call void asm sideeffect "", "{rsi}"(i32 %4) nounwind
// CHECK: %5 = call i32 asm sideeffect "", "={rsi}"() nounwind
// CHECK: store i32 %5, i32* %0, align 4
// CHECK: %6 = load i32* %0, align 4
// CHECK: store i32 %6, i32* %retval, align 4
}
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