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[NFC] Add test that demonstrates buggy behavior on term folding of LoopSimplifyCFG 

llvm-svn: 347488
This commit is contained in:
Max Kazantsev 2018-11-23 10:34:22 +00:00
parent fc448cfd25
commit 7231009b78
1 changed files with 29 additions and 0 deletions
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29
llvm/test/Transforms/LoopSimplifyCFG/phi_with_duplicating_inputs.ll Normal file
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; This is currently failing because of bug in LoopSimplifyCFG. It does not update
; duplicating Phi inputs properly.
; XFAIL: *
; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -loop-simplifycfg -debug-only=loop-simplifycfg -verify-loop-info -verify-dom-info -verify-loop-lcssa 2>&1 < %s | FileCheck %s
; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -passes='require<domtree>,loop(simplify-cfg)' -debug-only=loop-simplifycfg -verify-loop-info -verify-dom-info -verify-loop-lcssa 2>&1 < %s | FileCheck %s
; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -loop-simplifycfg -enable-mssa-loop-dependency=true -verify-memoryssa -debug-only=loop-simplifycfg -verify-loop-info -verify-dom-info -verify-loop-lcssa 2>&1 < %s | FileCheck %s
target datalayout = "P40"
@a = external global i16, align 1
; CHECK-LABEL: @f1(
define void @f1(i1 %cond) {
entry:
br label %for.cond
for.cond:
br i1 %cond, label %if.then, label %for.inc
if.then:
%0 = load i16, i16* @a, align 1
%tobool = icmp ne i16 %0, 0
br i1 %tobool, label %for.inc, label %for.inc
for.inc:
%c.1 = phi i16 [ 2, %if.then ], [ 2, %if.then ], [ 1, %for.cond ]
br label %for.cond
}