File: ms-inline-asm-functions.c

package info (click to toggle)
llvm-toolchain-4.0 1%3A4.0.1-10~deb9u2
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 493,332 kB
  • sloc: cpp: 2,698,100; ansic: 552,773; asm: 128,821; python: 121,589; objc: 105,054; sh: 21,174; lisp: 6,758; ml: 5,532; perl: 5,311; pascal: 5,245; makefile: 2,083; cs: 1,868; xml: 686; php: 212; csh: 117
file content (60 lines) | stat: -rw-r--r-- 1,438 bytes parent folder | download | duplicates (21)
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
// 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
}