File: inlineasmmemop.ll

package info (click to toggle)
llvm-toolchain-3.5 1%3A3.5.2-3~bpo8%2B2
  • links: PTS, VCS
  • area: main
  • in suites: jessie-backports
  • size: 283,276 kB
  • sloc: cpp: 1,884,580; ansic: 310,787; objc: 86,612; python: 79,608; asm: 65,866; sh: 9,829; makefile: 6,068; perl: 5,589; ml: 5,254; pascal: 3,285; lisp: 1,640; xml: 686; cs: 239; csh: 117
file content (65 lines) | stat: -rw-r--r-- 1,599 bytes parent folder | download
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
; RUN: llc -march=mipsel < %s | FileCheck %s

; Simple memory
@g1 = external global i32

define i32 @f1(i32 %x) nounwind {
entry:
; CHECK-LABEL: f1:
; CHECK: addiu $[[T0:[0-9]+]], $sp
; CHECK: #APP
; CHECK: sw $4, 0($[[T0]])
; CHECK: #NO_APP
; CHECK: #APP
; CHECK: lw $[[T3:[0-9]+]], 0($[[T0]])
; CHECK: #NO_APP
; CHECK: lw  $[[T1:[0-9]+]], %got(g1)
; CHECK: sw  $[[T3]], 0($[[T1]])

  %l1 = alloca i32, align 4
  call void asm "sw $1, $0", "=*m,r"(i32* %l1, i32 %x) nounwind
  %0 = call i32 asm "lw $0, $1", "=r,*m"(i32* %l1) nounwind
  store i32 %0, i32* @g1, align 4
  ret i32 %0
}

; CHECK-LABEL: main:
; "D": Second word of double word. This works for any memory element
; double or single.
; CHECK: #APP
; CHECK: lw ${{[0-9]+}},4(${{[0-9]+}});
; CHECK: #NO_APP

; No "D": First word of double word. This works for any memory element 
; double or single.
; CHECK: #APP
; CHECK: lw ${{[0-9]+}},0(${{[0-9]+}});
; CHECK: #NO_APP

;int b[8] = {0,1,2,3,4,5,6,7};
;int main()
;{
;  int i;
; 
;  // The first word. Notice, no 'D'
;  { asm (
;    "lw    %0,%1;\n"
;    : "=r" (i) : "m" (*(b+4)));}
; 
;  // The second word
;  { asm (
;    "lw    %0,%D1;\n"
;    : "=r" (i) "m" (*(b+4)));}
;}

@b = common global [20 x i32] zeroinitializer, align 4

define void @main() {
entry:
  tail call void asm sideeffect "    lw    $0,${1:D};", "r,*m,~{$11}"(i32 undef, i32* getelementptr inbounds ([20 x i32]* @b, i32 0, i32 3))
  tail call void asm sideeffect "    lw    $0,${1};", "r,*m,~{$11}"(i32 undef, i32* getelementptr inbounds ([20 x i32]* @b, i32 0, i32 3))
  ret void
}

attributes #0 = { nounwind }