6d2ea6ec80
This avoids problems on code like this:
char buf[16];
__asm {
movups xmm0, [buf]
mov [buf], eax
}
The frontend size in this case (1) is wrong, and the register makes the
instruction matching unambiguous. There are also enough bytes available
that we shouldn't complain to the user that they are potentially using
an incorrectly sized instruction to access the variable.
Supersedes D32636 and D26586 and fixes PR28266
llvm-svn: 302179
57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
// REQUIRES: x86-registered-target
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// RUN: %clang_cc1 %s -triple i386-apple-darwin10 -fasm-blocks -emit-llvm -o - | FileCheck %s
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struct A {
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int a1;
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int a2;
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struct B {
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int b1;
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int b2;
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} a3;
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};
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namespace asdf {
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A a_global;
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}
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extern "C" int test_param_field(A p) {
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// CHECK: define i32 @test_param_field(%struct.A* byval align 4 %p)
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// CHECK: getelementptr inbounds %struct.A, %struct.A* %p, i32 0, i32 0
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// CHECK: call i32 asm sideeffect inteldialect "mov eax, $1"
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// CHECK: ret i32
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__asm mov eax, p.a1
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}
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extern "C" int test_namespace_global() {
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// CHECK: define i32 @test_namespace_global()
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// CHECK: call i32 asm sideeffect inteldialect "mov eax, $1", "{{.*}}"(i32* getelementptr inbounds (%struct.A, %struct.A* @_ZN4asdf8a_globalE, i32 0, i32 2, i32 1))
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// CHECK: ret i32
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__asm mov eax, asdf::a_global.a3.b2
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}
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template <bool Signed>
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struct make_storage_type {
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struct type {
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struct B {
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int a;
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int x;
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} b;
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};
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};
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template <bool Signed>
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struct msvc_dcas_x86 {
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typedef typename make_storage_type<Signed>::type storage_type;
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void store() __asm("PR26001") {
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storage_type p;
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__asm mov edx, p.b.x;
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}
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};
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template void msvc_dcas_x86<false>::store();
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// CHECK: define weak_odr void @"\01PR26001"(
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// CHECK: %[[P:.*]] = alloca %"struct.make_storage_type<false>::type", align 4
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// CHECK: %[[B:.*]] = getelementptr inbounds %"struct.make_storage_type<false>::type", %"struct.make_storage_type<false>::type"* %[[P]], i32 0, i32 0
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// CHECK: %[[X:.*]] = getelementptr inbounds %"struct.make_storage_type<false>::type::B", %"struct.make_storage_type<false>::type::B"* %[[B]], i32 0, i32 1
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// CHECK: call void asm sideeffect inteldialect "mov edx, dword ptr $0", "*m,~{edx},~{dirflag},~{fpsr},~{flags}"(i32* %[[X]])
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