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
61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
// REQUIRES: x86-registered-target
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// RUN: %clang_cc1 %s -triple x86_64-apple-darwin10 -fasm-blocks -emit-llvm -o - | FileCheck %s
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void t1() {
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int var = 10;
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__asm mov rax, offset var ; rax = address of myvar
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// CHECK: t1
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// CHECK: call void asm sideeffect inteldialect
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// CHECK-SAME: mov rax, $0
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// CHECK-SAME: "r,~{rax},~{dirflag},~{fpsr},~{flags}"(i32* %{{.*}})
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}
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void t2() {
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int var = 10;
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__asm mov [eax], offset var
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// CHECK: t2
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// CHECK: call void asm sideeffect inteldialect
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// CHECK-SAME: mov [eax], $0
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// CHECK-SAME: "r,~{dirflag},~{fpsr},~{flags}"(i32* %{{.*}})
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}
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struct t3_type { int a, b; };
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int t3() {
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struct t3_type foo;
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foo.a = 1;
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foo.b = 2;
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__asm {
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lea ebx, foo
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mov eax, [ebx].0
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mov [ebx].4, ecx
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}
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return foo.b;
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// CHECK: t3
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// CHECK: call void asm sideeffect inteldialect
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// CHECK-SAME: lea ebx, $0
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// CHECK-SAME: mov eax, [ebx].0
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// CHECK-SAME: mov [ebx].4, ecx
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// CHECK-SAME: "*m,~{eax},~{ebx},~{dirflag},~{fpsr},~{flags}"(%struct.t3_type* %{{.*}})
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}
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int t4() {
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struct t3_type foo;
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foo.a = 1;
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foo.b = 2;
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__asm {
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lea ebx, foo
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{
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mov eax, [ebx].foo.a
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}
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mov [ebx].foo.b, ecx
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}
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return foo.b;
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// CHECK: t4
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// CHECK: call void asm sideeffect inteldialect
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// CHECK-SAME: lea ebx, $0
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// CHECK-SAME: mov eax, [ebx].0
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// CHECK-SAME: mov [ebx].4, ecx
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// CHECK-SAME: "*m,~{eax},~{ebx},~{dirflag},~{fpsr},~{flags}"(%struct.t3_type* %{{.*}})
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}
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