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