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[NFC] Add a failing test on live block markup in term folding 

llvm-svn: 352023
This commit is contained in:
Max Kazantsev 2019-01-24 05:05:55 +00:00
parent 5b18ddb6d1
commit 11d3314241
1 changed files with 40 additions and 0 deletions
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40
llvm/test/Transforms/LoopSimplifyCFG/live_block_marking.ll Normal file
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@ -0,0 +1,40 @@
; XFAIL: *
; REQUIRES: asserts
; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -indvars -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(indvars,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 -indvars -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
; This test demonstrates a bug in live blocks markup that is only catchable in
; inter-pass interaction.
define void @test(i1 %c) {
; CHECK-LABEL: @test(
entry:
br label %outer
outer:
br i1 %c, label %to_fold, label %latch
to_fold:
br i1 %c, label %latch, label %inner
inner:
%iv = phi i32 [0, %to_fold], [%iv.next, %inner_latch]
%never = icmp sgt i32 %iv, 40
br i1 %never, label %inner_latch, label %undead
inner_latch:
%iv.next = add i32 %iv, 1
%cmp = icmp slt i32 %iv.next, 10
br i1 %cmp, label %inner, label %latch
undead:
br label %latch
latch:
br i1 true, label %outer, label %dead_exit
dead_exit:
ret void
}