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

// REQUIRES: x86-registered-target
// RUN: %clang_cc1 %s -triple x86_64-apple-darwin10 -fasm-blocks -Wno-microsoft -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}}
  }
}

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}}

  // FIXME: Only emit one diagnostic here.
  // 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!}}
}