source: icGREP/icgrep-devel/llvm-3.8.0.src/test/Analysis/BranchProbabilityInfo/pr18705.ll @ 5027

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

Upgrade to llvm 3.8

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Line 
1; RUN: opt < %s -analyze -branch-prob | FileCheck %s
2
3; Since neither of while.body's out-edges is an exit or a back edge,
4; calcLoopBranchHeuristics should return early without setting the weights.
5; calcFloatingPointHeuristics, which is run later, sets the weights.
6;
7; CHECK: edge while.body -> if.then probability is 0x50000000 / 0x80000000 = 62.50%
8; CHECK: edge while.body -> if.else probability is 0x30000000 / 0x80000000 = 37.50%
9
10define void @foo1(i32 %n, i32* nocapture %b, i32* nocapture %c, i32* nocapture %d, float* nocapture readonly %f0, float* nocapture readonly %f1) {
11entry:
12  %tobool8 = icmp eq i32 %n, 0
13  br i1 %tobool8, label %while.end, label %while.body.lr.ph
14
15while.body.lr.ph:
16  %0 = sext i32 %n to i64
17  br label %while.body
18
19while.body:
20  %indvars.iv = phi i64 [ %0, %while.body.lr.ph ], [ %indvars.iv.next, %if.end ]
21  %b.addr.011 = phi i32* [ %b, %while.body.lr.ph ], [ %b.addr.1, %if.end ]
22  %d.addr.010 = phi i32* [ %d, %while.body.lr.ph ], [ %incdec.ptr4, %if.end ]
23  %c.addr.09 = phi i32* [ %c, %while.body.lr.ph ], [ %c.addr.1, %if.end ]
24  %indvars.iv.next = add nsw i64 %indvars.iv, -1
25  %arrayidx = getelementptr inbounds float, float* %f0, i64 %indvars.iv.next
26  %1 = load float, float* %arrayidx, align 4
27  %arrayidx2 = getelementptr inbounds float, float* %f1, i64 %indvars.iv.next
28  %2 = load float, float* %arrayidx2, align 4
29  %cmp = fcmp une float %1, %2
30  br i1 %cmp, label %if.then, label %if.else
31
32if.then:
33  %incdec.ptr = getelementptr inbounds i32, i32* %b.addr.011, i64 1
34  %3 = load i32, i32* %b.addr.011, align 4
35  %add = add nsw i32 %3, 12
36  store i32 %add, i32* %b.addr.011, align 4
37  br label %if.end
38
39if.else:
40  %incdec.ptr3 = getelementptr inbounds i32, i32* %c.addr.09, i64 1
41  %4 = load i32, i32* %c.addr.09, align 4
42  %sub = add nsw i32 %4, -13
43  store i32 %sub, i32* %c.addr.09, align 4
44  br label %if.end
45
46if.end:
47  %c.addr.1 = phi i32* [ %c.addr.09, %if.then ], [ %incdec.ptr3, %if.else ]
48  %b.addr.1 = phi i32* [ %incdec.ptr, %if.then ], [ %b.addr.011, %if.else ]
49  %incdec.ptr4 = getelementptr inbounds i32, i32* %d.addr.010, i64 1
50  store i32 14, i32* %d.addr.010, align 4
51  %5 = trunc i64 %indvars.iv.next to i32
52  %tobool = icmp eq i32 %5, 0
53  br i1 %tobool, label %while.end, label %while.body
54
55while.end:
56  ret void
57}
58
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