clang/test/Sema/ms-inline-asm.c

// REQUIRES: x86-registered-target
// RUN: %clang_cc1 %s -triple x86_64-apple-darwin10 -fms-extensions -fasm-blocks -Wno-microsoft -Wunused-label -verify -fsyntax-only

void t1(void) { 
 __asm __asm // expected-error {{__asm used with no assembly instructions}}
}

void f() {
  int foo;
  __asm { 
    mov eax, eax
    .unknowndirective // expected-error {{unknown directive}}
  }
  f();
  __asm {
    mov eax, 1+=2 // expected-error {{unknown token in expression}}
  }
  f();
  __asm {
    mov eax, 1+++ // expected-error {{unknown token in expression}}
  }
  f();
  __asm {
    mov eax, LENGTH bar // expected-error {{unable to lookup expression}}
  }
  f();
  __asm {
    mov eax, SIZE bar // expected-error {{unable to lookup expression}}
  }
  f();
  __asm {
    mov eax, TYPE bar // expected-error {{unable to lookup expression}} expected-error {{use of undeclared label 'bar'}}
  }
}

void rdar15318432(void) {
  // We used to crash on this.  When LLVM called back to Clang to parse a name
  // and do name lookup, if parsing failed, we did not restore the lexer state
  // properly.

  __asm {
    and ecx, ~15
  }

  int x = 0;
  __asm {
    and ecx, x
    and ecx, ~15
  }
}

static int global;

int t2(int *arr, int i) {
  __asm {
    mov eax, arr;
    mov eax, arr[0];
    mov eax, arr[1 + 2];
    mov eax, arr[1 + (2 * 5) - 3 + 1<<1];
  }

  // expected-error@+1 {{cannot use base register with variable reference}}
  __asm { mov eax, arr[ebp + 1 + (2 * 5) - 3 + 1<<1] }
  // expected-error@+1 {{cannot use index register with variable reference}}
  __asm { mov eax, arr[esi * 4] }
  // expected-error@+1 {{cannot use more than one symbol in memory operand}}
  __asm { mov eax, arr[i] }
  // expected-error@+1 {{cannot use more than one symbol in memory operand}}
  __asm { mov eax, global[i] }

  // FIXME: Why don't we diagnose this?
  // expected-Xerror@+1 {{cannot reference multiple local variables in assembly operand}}
  //__asm mov eax, [arr + i];
  return 0;
}

typedef struct {
  int a;
  int b;
} A;

void t3() {
  __asm { mov eax, [eax] UndeclaredId } // expected-error {{unknown token in expression}} expected-error {{use of undeclared label 'UndeclaredId'}}

  // FIXME: Only emit one diagnostic here.
  // expected-error@+3 {{use of undeclared label 'A'}}
  // expected-error@+2 {{unexpected type name 'A': expected expression}}
  // expected-error@+1 {{unknown token in expression}}
  __asm { mov eax, [eax] A }
}

void t4() {
  // The dot in the "intel dot operator" is optional in MSVC.  MSVC also does
  // global field lookup, but we don't.
  __asm { mov eax, [0] A.a }
  __asm { mov eax, [0].A.a }
  __asm { mov eax, [0].a } // expected-error {{Unable to lookup field reference!}}
  __asm { mov eax, fs:[0] A.a }
  __asm { mov eax, fs:[0].A.a }
  __asm { mov eax, fs:[0].a } // expected-error {{Unable to lookup field reference!}}
  __asm { mov eax, fs:[0]. A.a } // expected-error {{Unexpected token type!}}
}

void test_operand_size() {
  __asm { call word t4 } // expected-error {{Expected 'PTR' or 'ptr' token!}}
}

__declspec(naked) int t5(int x) { // expected-note {{attribute is here}}
  asm { movl eax, x } // expected-error {{parameter references not allowed in naked functions}} expected-error {{use of undeclared label 'x'}}
  asm { retl }
}

int y;
__declspec(naked) int t6(int x) {
  asm { mov eax, y } // No error.
  asm { ret }
}

void t7() {
  __asm {
    foo: // expected-note {{inline assembly label 'foo' declared here}}
    mov eax, 0
  }
  goto foo; // expected-error {{cannot jump from this goto statement to label 'foo' inside an inline assembly block}}
}

void t8() {
  __asm foo: // expected-note {{inline assembly label 'foo' declared here}}
  __asm mov eax, 0
  goto foo; // expected-error {{cannot jump from this goto statement to label 'foo' inside an inline assembly block}}
}

void t9() {
  goto foo; // expected-error {{cannot jump from this goto statement to label 'foo' inside an inline assembly block}}
  __asm {
    foo: // expected-note {{inline assembly label 'foo' declared here}}
    mov eax, 0
  }
}

void t10() {
  goto foo; // expected-error {{cannot jump from this goto statement to label 'foo' inside an inline assembly block}}
  __asm foo: // expected-note {{inline assembly label 'foo' declared here}}
  __asm mov eax, 0
}

void t11() {
foo:
  __asm mov eax, foo // expected-error {{use of undeclared label 'foo'}} expected-warning {{unused label 'foo'}}
}

void t12() {
  __asm foo:
  __asm bar: // expected-warning {{unused label 'bar'}}
  __asm jmp foo
}