| // 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: %asmtmp = call i32 asm sideeffect "; $0 This asm defines rsi", "={rsi} |
| // CHECK: store i32 %asmtmp, i32* %a |
| |
| a = 42; |
| // CHECK: store i32 42, i32* %a, align 4 |
| |
| asm volatile("; %0 This asm uses rsi" : : "r"(a)); |
| // CHECK: %1 = load i32* %a, align 4 |
| // CHECK: call void asm sideeffect "", "{rsi}"(i32 %1) nounwind |
| // CHECK: %2 = call i32 asm sideeffect "", "={rsi}"() nounwind |
| // CHECK: call void asm sideeffect "; $0 This asm uses rsi", "{rsi},~{dirflag},~{fpsr},~{flags}"(i32 %2) |
| |
| return a; |
| // CHECK: %3 = load i32* %a, align 4 |
| // CHECK: call void asm sideeffect "", "{rsi}"(i32 %3) nounwind |
| // CHECK: %4 = call i32 asm sideeffect "", "={rsi}"() nounwind |
| // CHECK: store i32 %4, i32* %0, align 4 |
| // CHECK: %5 = load i32* %0, align 4 |
| // CHECK: store i32 %5, i32* %retval, align 4 |
| } |
