File: ms-inline-asm-functions.c

package info (click to toggle)
llvm-toolchain-20 1%3A20.1.6-1~exp1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,111,304 kB
  • sloc: cpp: 7,438,677; ansic: 1,393,822; asm: 1,012,926; python: 241,650; f90: 86,635; objc: 75,479; lisp: 42,144; pascal: 17,286; sh: 10,027; ml: 5,082; perl: 4,730; awk: 3,523; makefile: 3,349; javascript: 2,251; xml: 892; fortran: 672
file content (71 lines) | stat: -rw-r--r-- 1,619 bytes parent folder | download | duplicates (12)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
// 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(void))(int);

int foo(void) {
  // 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   *({{.*}})

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

int bar(void) {
  // CHECK-LABEL: _bar:
  __asm {
    jmp k
    ja k
    JAE k
    LOOP k
    loope k
    loopne k
  };
  // CHECK:      jmp     _k
  // CHECK-NEXT: ja      _k
  // CHECK-NEXT: jae     _k
  // CHECK-NEXT: loop    _k
  // CHECK-NEXT: loope   _k
  // CHECK-NEXT: loopne  _k
}

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