1; RUN: llc -O3 -mcpu=cortex-a53 -mtriple=aarch64--linux-gnu %s -o - | FileCheck %s
2; PR20188: don't crash when merging sexts.
3
4; CHECK: foo:
5define void @foo() unnamed_addr align 2 {
6entry:
7  br label %invoke.cont145
8
9invoke.cont145:
10  %or.cond = and i1 undef, false
11  br i1 %or.cond, label %if.then274, label %invoke.cont145
12
13if.then274:
14  %0 = load i32* null, align 4
15  br i1 undef, label %invoke.cont291, label %if.else313
16
17invoke.cont291:
18  %idxprom.i.i.i605 = sext i32 %0 to i64
19  %arrayidx.i.i.i607 = getelementptr inbounds double* undef, i64 %idxprom.i.i.i605
20  %idxprom.i.i.i596 = sext i32 %0 to i64
21  %arrayidx.i.i.i598 = getelementptr inbounds double* undef, i64 %idxprom.i.i.i596
22  br label %if.end356
23
24if.else313:
25  %cmp314 = fcmp olt double undef, 0.000000e+00
26  br i1 %cmp314, label %invoke.cont317, label %invoke.cont353
27
28invoke.cont317:
29  br i1 undef, label %invoke.cont326, label %invoke.cont334
30
31invoke.cont326:
32  %idxprom.i.i.i587 = sext i32 %0 to i64
33  %arrayidx.i.i.i589 = getelementptr inbounds double* undef, i64 %idxprom.i.i.i587
34  %sub329 = fsub fast double undef, undef
35  br label %invoke.cont334
36
37invoke.cont334:
38  %lo.1 = phi double [ %sub329, %invoke.cont326 ], [ undef, %invoke.cont317 ]
39  br i1 undef, label %invoke.cont342, label %if.end356
40
41invoke.cont342:
42  %idxprom.i.i.i578 = sext i32 %0 to i64
43  %arrayidx.i.i.i580 = getelementptr inbounds double* undef, i64 %idxprom.i.i.i578
44  br label %if.end356
45
46invoke.cont353:
47  %idxprom.i.i.i572 = sext i32 %0 to i64
48  %arrayidx.i.i.i574 = getelementptr inbounds double* undef, i64 %idxprom.i.i.i572
49  br label %if.end356
50
51if.end356:
52  %lo.2 = phi double [ 0.000000e+00, %invoke.cont291 ], [ %lo.1, %invoke.cont342 ], [ undef, %invoke.cont353 ], [ %lo.1, %invoke.cont334 ]
53  call void null(i32 %0, double %lo.2)
54  unreachable
55}
56