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902fa41188
Summary: Some CPUID leafs depend on the value of ECX as well as EAX, but we left it uninitialized. Originally reported as https://crbug.com/901547 Reviewers: craig.topper, hans Subscribers: cfe-commits Differential Revision: https://reviews.llvm.org/D54171 llvm-svn: 346265
19 lines
848 B
C
19 lines
848 B
C
// RUN: %clang_cc1 -ffreestanding -fms-extensions -fms-compatibility -fms-compatibility-version=17.00 \
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// RUN: -triple i686-windows-msvc -emit-llvm %s -o - | FileCheck %s
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// RUN: %clang_cc1 -ffreestanding -fms-extensions -fms-compatibility -fms-compatibility-version=17.00 \
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// RUN: -triple x86_64-windows-msvc -emit-llvm %s -o - | FileCheck %s
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// intrin.h needs size_t, but -ffreestanding prevents us from getting it from
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// stddef.h. Work around it with this typedef.
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typedef __SIZE_TYPE__ size_t;
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#include <intrin.h>
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void test__cpuid(int *info, int level) {
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__cpuid(info, level);
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}
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// CHECK-LABEL: define {{.*}} @test__cpuid(i32* %{{.*}}, i32 %{{.*}})
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// CHECK: call { i32, i32, i32, i32 } asm "cpuid",
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// CHECK-SAME: "={ax},={bx},={cx},={dx},{ax},{cx},~{dirflag},~{fpsr},~{flags}"
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// CHECK-SAME: (i32 %{{.*}}, i32 0)
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