c449460d8a
https://reviews.llvm.org/D151863 (2023-05) removed
`BaseReg = BaseReg ? BaseReg : 1` (introduced in commit
175d0aeef3 (2013)) and caused a
regression: ensuring a non-zero `BaseReg` was to treat
`static void (*fptr)(); __asm { call fptr }` as non-`AbsMem`
`AsmOperandClass` and generate `call $0`/`callq *fptr(%rip)` instead of
`call ${0:P}`/`callq *fptr`
(The asm template argument modifier `P` is for call targets, while
no modifier is used by other instructions like `mov rax, fptr`)
This patch reinstates the BaseReg-setting statement but places it inside
`if (IsGlobalLV)` for clarify.
The special case is unfortunate, but we also have special case in
similar places (https://reviews.llvm.org/D149920).
Fix: #73033
87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
// REQUIRES: x86-registered-target
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// RUN: %clang_cc1 %s -triple x86_64-apple-darwin10 -Wno-strict-prototypes -fasm-blocks -emit-llvm -o - | FileCheck %s
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void t1(void) {
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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}"(ptr %{{.*}})
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}
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void t2(void) {
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int var = 10;
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__asm mov qword ptr [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 qword ptr [eax], $0
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// CHECK-SAME: "r,~{dirflag},~{fpsr},~{flags}"(ptr %{{.*}})
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}
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struct t3_type { int a, b; };
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int t3(void) {
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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]
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// CHECK-SAME: mov [ebx + $$4], ecx
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// CHECK-SAME: "*m,~{eax},~{ebx},~{dirflag},~{fpsr},~{flags}"(ptr elementtype(%struct.t3_type) %{{.*}})
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}
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int t4(void) {
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struct t3_type foo;
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foo.a = 1;
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foo.b = 2;
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__asm {
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lea ebx, foo
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{
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mov eax, [ebx].foo.a
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}
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mov [ebx].foo.b, ecx
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}
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return foo.b;
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// CHECK: t4
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// CHECK: call void asm sideeffect inteldialect
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// CHECK-SAME: lea ebx, $0
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// CHECK-SAME: mov eax, [ebx]
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// CHECK-SAME: mov [ebx + $$4], ecx
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// CHECK-SAME: "*m,~{eax},~{ebx},~{dirflag},~{fpsr},~{flags}"(ptr elementtype(%struct.t3_type) %{{.*}})
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}
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void bar() {}
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static void (*fptr)();
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void t5(void) {
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__asm {
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call bar
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jmp bar
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call fptr
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jmp fptr
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}
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// CHECK: t5
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// CHECK: call void asm sideeffect inteldialect
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// CHECK-SAME: call ${0:P}
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// CHECK-SAME: jmp ${1:P}
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// CHECK-SAME: call $2
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// CHECK-SAME: jmp $3
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// CHECK-SAME: "*m,*m,*m,*m,~{dirflag},~{fpsr},~{flags}"(ptr elementtype(void (...)) @bar, ptr elementtype(void (...)) @bar, ptr elementtype(ptr) @fptr, ptr elementtype(ptr) @fptr)
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}
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void t47(void) {
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// CHECK-LABEL: define{{.*}} void @t47
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int arr[1000];
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__asm movdir64b rax, zmmword ptr [arr]
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// CHECK: call void asm sideeffect inteldialect "movdir64b rax, zmmword ptr $0", "*m,~{dirflag},~{fpsr},~{flags}"(ptr elementtype([1000 x i32]) %arr)
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}
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