source: icGREP/icgrep-devel/llvm-3.8.0.src/test/CodeGen/ARM/cmpxchg-weak.ll @ 5027

Last change on this file since 5027 was 5027, checked in by cameron, 3 years ago

Upgrade to llvm 3.8

File size: 1.8 KB
Line 
1; RUN: llc < %s -mtriple=armv7-apple-ios -verify-machineinstrs | FileCheck %s
2
3define void @test_cmpxchg_weak(i32 *%addr, i32 %desired, i32 %new) {
4; CHECK-LABEL: test_cmpxchg_weak:
5
6  %pair = cmpxchg weak i32* %addr, i32 %desired, i32 %new seq_cst monotonic
7  %oldval = extractvalue { i32, i1 } %pair, 0
8; CHECK-NEXT: BB#0:
9; CHECK-NEXT:     dmb ish
10; CHECK-NEXT:     ldrex   [[LOADED:r[0-9]+]], [r0]
11; CHECK-NEXT:     cmp     [[LOADED]], r1
12; CHECK-NEXT:     bne     [[LDFAILBB:LBB[0-9]+_[0-9]+]]
13; CHECK-NEXT: BB#1:
14; CHECK-NEXT:     strex   [[SUCCESS:r[0-9]+]], r2, [r0]
15; CHECK-NEXT:     cmp     [[SUCCESS]], #0
16; CHECK-NEXT:     bne     [[FAILBB:LBB[0-9]+_[0-9]+]]
17; CHECK-NEXT: BB#2:
18; CHECK-NEXT:     dmb     ish
19; CHECK-NEXT:     str     r3, [r0]
20; CHECK-NEXT:     bx      lr
21; CHECK-NEXT: [[LDFAILBB]]:
22; CHECK-NEXT:     clrex
23; CHECK-NEXT: [[FAILBB]]:
24; CHECK-NEXT:     str     r3, [r0]
25; CHECK-NEXT:     bx      lr
26
27  store i32 %oldval, i32* %addr
28  ret void
29}
30
31
32define i1 @test_cmpxchg_weak_to_bool(i32, i32 *%addr, i32 %desired, i32 %new) {
33; CHECK-LABEL: test_cmpxchg_weak_to_bool:
34
35  %pair = cmpxchg weak i32* %addr, i32 %desired, i32 %new seq_cst monotonic
36  %success = extractvalue { i32, i1 } %pair, 1
37
38; CHECK-NEXT: BB#0:
39; CHECK-NEXT:     dmb ish
40; CHECK-NEXT:     ldrex   [[LOADED:r[0-9]+]], [r1]
41; CHECK-NEXT:     cmp     [[LOADED]], r2
42; CHECK-NEXT:     bne     [[LDFAILBB:LBB[0-9]+_[0-9]+]]
43; CHECK-NEXT: BB#1:
44; CHECK-NEXT:     strex   [[SUCCESS:r[0-9]+]], r3, [r1]
45; CHECK-NEXT:     mov     r0, #0
46; CHECK-NEXT:     cmp     [[SUCCESS]], #0
47; CHECK-NEXT:     bxne    lr
48; CHECK-NEXT:     dmb     ish
49; CHECK-NEXT:     mov     r0, #1
50; CHECK-NEXT:     bx      lr
51; CHECK-NEXT: [[LDFAILBB]]:
52; CHECK-NEXT:     clrex
53; CHECK-NEXT:     mov     r0, #0
54; CHECK-NEXT:     bx      lr
55
56  ret i1 %success
57}
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