xref: /aosp_15_r20/external/clang/test/CodeGen/ms-inline-asm-functions.c (revision 67e74705e28f6214e480b399dd47ea732279e315)

// REQUIRES: x86-registered-target
// RUN: %clang_cc1 %s -triple i386-pc-windows-msvc -fms-extensions -S -o - | FileCheck %s

// Yes, this is an assembly test from Clang, because we need to make it all the
// way through code generation to know if our call became a direct, pc-relative
// call or an indirect call through memory.

int k(int);
__declspec(dllimport) int kimport(int);
int (*kptr)(int);
int (*gptr())(int);

int foo() {
  // CHECK-LABEL: _foo:
  int (*r)(int) = gptr();

  // Simple case: direct call.
  __asm call k;
  // CHECK:     calll   _k

  // Marginally harder: indirect calls, via dllimport or function pointer.
  __asm call r;
  // CHECK:     calll   *({{.*}})
  __asm call kimport;
  // CHECK:     calll   *({{.*}})

  // Broken case: Call through a global function pointer.
  __asm call kptr;
  // CHECK:     calll   _kptr
  // CHECK-FIXME: calll   *_kptr
}

int bar() {
  // CHECK-LABEL: _bar:
  __asm jmp k;
  // CHECK:     jmp     _k
}

int baz() {
  // CHECK-LABEL: _baz:
  __asm mov eax, k;
  // CHECK: movl    _k, %eax
  __asm mov eax, kptr;
  // CHECK: movl    _kptr, %eax
}

// Test that this asm blob doesn't require more registers than available.  This
// has to be an LLVM code generation test.

void __declspec(naked) naked() {
  __asm pusha
  __asm call k
  __asm popa
  __asm ret
  // CHECK-LABEL: _naked:
  // CHECK: pushal
  // CHECK-NEXT: calll _k
  // CHECK-NEXT: popal
  // CHECK-NEXT: retl
}