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; RUN: llc -O3 -mcpu=cortex-a53 -mtriple=aarch64--linux-gnu %s -o - | FileCheck %s
; PR20188: don't crash when merging sexts.
; CHECK: foo:
define void @foo(i1 %arg) unnamed_addr align 2 {
entry:
br label %invoke.cont145
invoke.cont145:
%or.cond = and i1 undef, false
br i1 %or.cond, label %if.then274, label %invoke.cont145
if.then274:
%0 = load i32, ptr null, align 4
br i1 %arg, label %invoke.cont291, label %if.else313
invoke.cont291:
%idxprom.i.i.i605 = sext i32 %0 to i64
%arrayidx.i.i.i607 = getelementptr inbounds double, ptr undef, i64 %idxprom.i.i.i605
%idxprom.i.i.i596 = sext i32 %0 to i64
%arrayidx.i.i.i598 = getelementptr inbounds double, ptr undef, i64 %idxprom.i.i.i596
br label %if.end356
if.else313:
%cmp314 = fcmp olt double undef, 0.000000e+00
br i1 %cmp314, label %invoke.cont317, label %invoke.cont353
invoke.cont317:
br i1 %arg, label %invoke.cont326, label %invoke.cont334
invoke.cont326:
%idxprom.i.i.i587 = sext i32 %0 to i64
%arrayidx.i.i.i589 = getelementptr inbounds double, ptr undef, i64 %idxprom.i.i.i587
%sub329 = fsub fast double undef, undef
br label %invoke.cont334
invoke.cont334:
%lo.1 = phi double [ %sub329, %invoke.cont326 ], [ undef, %invoke.cont317 ]
br i1 %arg, label %invoke.cont342, label %if.end356
invoke.cont342:
%idxprom.i.i.i578 = sext i32 %0 to i64
%arrayidx.i.i.i580 = getelementptr inbounds double, ptr undef, i64 %idxprom.i.i.i578
br label %if.end356
invoke.cont353:
%idxprom.i.i.i572 = sext i32 %0 to i64
%arrayidx.i.i.i574 = getelementptr inbounds double, ptr undef, i64 %idxprom.i.i.i572
br label %if.end356
if.end356:
%lo.2 = phi double [ 0.000000e+00, %invoke.cont291 ], [ %lo.1, %invoke.cont342 ], [ undef, %invoke.cont353 ], [ %lo.1, %invoke.cont334 ]
call void null(i32 %0, double %lo.2)
unreachable
}
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