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Clang on Windows targets often requires indirect calls through the import address table (IAT), and also .refptr stubs for MinGW target. On 32-bit this generates assembly in the form of `call dword ptr [__imp__func]`, which MC had failed to handle correctly. 64-bit targets are not affected because rip-relative addressing is used. Reported on: https://github.com/llvm/llvm-project/issues/62010 Depends on D149695, D149920 Differential Revision: https://reviews.llvm.org/D149579
72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
// REQUIRES: x86-registered-target
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// RUN: %clang_cc1 %s -triple i386-pc-windows-msvc -fms-extensions -S -o - | FileCheck %s
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// Yes, this is an assembly test from Clang, because we need to make it all the
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// way through code generation to know if our call became a direct, pc-relative
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// call or an indirect call through memory.
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int k(int);
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__declspec(dllimport) int kimport(int);
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int (*kptr)(int);
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int (*gptr(void))(int);
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int foo(void) {
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// CHECK-LABEL: _foo:
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int (*r)(int) = gptr();
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// Simple case: direct call.
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__asm call k;
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// CHECK: calll _k
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// Marginally harder: indirect calls, via dllimport or function pointer.
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__asm call r;
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// CHECK: calll *({{.*}})
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__asm call kimport;
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// CHECK: calll *({{.*}})
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// Call through a global function pointer.
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__asm call kptr;
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// CHECK: calll *_kptr
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}
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int bar(void) {
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// CHECK-LABEL: _bar:
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__asm {
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jmp k
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ja k
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JAE k
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LOOP k
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loope k
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loopne k
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};
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// CHECK: jmp _k
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// CHECK-NEXT: ja _k
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// CHECK-NEXT: jae _k
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// CHECK-NEXT: loop _k
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// CHECK-NEXT: loope _k
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// CHECK-NEXT: loopne _k
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}
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int baz(void) {
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// CHECK-LABEL: _baz:
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__asm mov eax, k;
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// CHECK: movl _k, %eax
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__asm mov eax, kptr;
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// CHECK: movl _kptr, %eax
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}
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// Test that this asm blob doesn't require more registers than available. This
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// has to be an LLVM code generation test.
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void __declspec(naked) naked(void) {
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__asm pusha
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__asm call k
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__asm popa
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__asm ret
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// CHECK-LABEL: _naked:
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// CHECK: pushal
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// CHECK-NEXT: calll _k
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// CHECK-NEXT: popal
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// CHECK-NEXT: retl
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}
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