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Imported Upstream version 5.18.0.179

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Former-commit-id: 67aa10e65b237e1c4537630979ee99ebe1374215
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Xamarin Public Jenkins (auto-signing)
2018-10-25 08:34:57 +00:00
parent d6bde52373
commit 8625704ad8
28485 changed files with 3866843 additions and 50 deletions
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32
external/llvm/test/Transforms/LoopSimplify/pr30454.ll vendored Normal file
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@ -0,0 +1,32 @@
; RUN: opt < %s -lcssa -licm -S | FileCheck %s
; PR30454
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
declare i8 @bar()
; Test that we preserve LCSSA form when removing edges from unreachable blocks.
; CHECK-LABEL: @foo
define void @foo() {
entry:
br label %for.cond
for.cond:
%x = phi i8 [ undef, %entry ], [ %y, %for.latch ]
br i1 undef, label %for.latch, label %exit
; CHECK: unreachable.bb:
; CHECK-NEXT: unreachable
unreachable.bb:
br i1 undef, label %exit, label %for.latch
for.latch:
%y = call i8 @bar()
br label %for.cond
; CHECK: exit:
; CHECK-NEXT: %x.lcssa = phi i8 [ %x, %for.cond ]
exit:
%z = zext i8 %x to i32
ret void
}