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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112697 91177308-0d34-0410-b5e6-96231b3b80d8
33 lines
1.1 KiB
C
33 lines
1.1 KiB
C
// RUN: %llvmgcc %s -m64 -S -o - | FileCheck %s
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// Exercise various use cases for local asm "register variables".
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// XFAIL: *
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// XTARGET: x86_64,i686,i386
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int foo() {
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// CHECK: %a = alloca i32
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register int a asm("rsi")=5;
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// CHECK: store i32 5, i32* %a, align 4
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asm volatile("; %0 This asm defines rsi" : "=r"(a));
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// CHECK: %asmtmp = call i32 asm sideeffect "; $0 This asm defines rsi", "={rsi}
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// CHECK: store i32 %asmtmp, i32* %a
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a = 42;
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// CHECK: store i32 42, i32* %a, align 4
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asm volatile("; %0 This asm uses rsi" : : "r"(a));
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// CHECK: %1 = load i32* %a, align 4
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// CHECK: call void asm sideeffect "", "{rsi}"(i32 %1) nounwind
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// CHECK: %2 = call i32 asm sideeffect "", "={rsi}"() nounwind
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// CHECK: call void asm sideeffect "; $0 This asm uses rsi", "{rsi},~{dirflag},~{fpsr},~{flags}"(i32 %2)
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return a;
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// CHECK: %3 = load i32* %a, align 4
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// CHECK: call void asm sideeffect "", "{rsi}"(i32 %3) nounwind
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// CHECK: %4 = call i32 asm sideeffect "", "={rsi}"() nounwind
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// CHECK: store i32 %4, i32* %0, align 4
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// CHECK: %5 = load i32* %0, align 4
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// CHECK: store i32 %5, i32* %retval, align 4
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}
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