source: icGREP/icgrep-devel/llvm-3.8.0.src/test/CodeGen/ARM/ifcvt-branch-weight-bug.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: 1.9 KB
Line 
1; RUN: llc < %s -mtriple=armv4t--linux-androideabi -print-machineinstrs=if-converter -o /dev/null 2>&1 | FileCheck %s
2; Fix a bug triggered in IfConverterTriangle when CvtBB has multiple
3; predecessors.
4; PR18752
5
6%classK = type { i8, %classF }
7%classF = type { i8 }
8%classL = type { %classG, i32, i32 }
9%classG = type { %classL* }
10%classM2 = type { %classL }
11
12define zeroext i1 @test(%classK* %this, %classM2* nocapture readnone %p1, %classM2* nocapture readnone %p2) align 2 {
13entry:
14  br i1 undef, label %for.end, label %for.body
15
16; Before if conversion, we have
17; for.body -> lor.lhs.false.i (50%)
18;          -> for.cond.backedge (50%)
19; lor.lhs.false.i -> for.cond.backedge (100%)
20;                 -> cond.false.i (0%)
21; Afer if conversion, we have
22; for.body -> for.cond.backedge (100%)
23;          -> cond.false.i (0%)
24; CHECK: BB#1: derived from LLVM BB %for.body
25; CHECK: Successors according to CFG: BB#2(0x7ffffc00 / 0x80000000 = 100.00%) BB#4(0x00000400 / 0x80000000 = 0.00%)
26for.body:
27  br i1 undef, label %for.cond.backedge, label %lor.lhs.false.i, !prof !1
28
29for.cond.backedge:
30  %tobool = icmp eq %classL* undef, null
31  br i1 %tobool, label %for.end, label %for.body
32
33lor.lhs.false.i:
34  %tobool.i.i7 = icmp eq i32 undef, 0
35  br i1 %tobool.i.i7, label %for.cond.backedge, label %cond.false.i
36
37cond.false.i:
38  call void @_Z3fn1v()
39  unreachable
40
41for.end:
42  br i1 undef, label %if.else.i.i, label %if.then.i.i
43
44if.then.i.i:
45  store %classL* null, %classL** undef, align 4
46  br label %_ZN1M6spliceEv.exit
47
48if.else.i.i:
49  store %classL* null, %classL** null, align 4
50  br label %_ZN1M6spliceEv.exit
51
52_ZN1M6spliceEv.exit:
53  %LIS = getelementptr inbounds %classK, %classK* %this, i32 0, i32 1
54  call void @_ZN1F10handleMoveEb(%classF* %LIS, i1 zeroext false)
55  unreachable
56}
57
58declare %classL* @_ZN1M1JI1LS1_EcvPS1_Ev(%classM2*)
59declare void @_ZN1F10handleMoveEb(%classF*, i1 zeroext)
60declare void @_Z3fn1v()
61
62!0 = !{!"clang version 3.5"}
63!1 = !{!"branch_weights", i32 62, i32 62}
Note: See TracBrowser for help on using the repository browser.