d2d3244363
Summary: MemorySSA is not properly updated in LoopSimplifyCFG after recent changes. Use SplitBlock utility to resolve that and clear all updates once handleDeadExits is finished. All updates that follow are removal of edges which are safe to handle via the removeEdge() API. Also, deleting dead blocks is done correctly as is, i.e. delete from MemorySSA before updating the CFG and DT. Reviewers: mkazantsev, rtereshin Subscribers: sanjoy, jlebar, Prazek, george.burgess.iv, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D58524 llvm-svn: 354613
63 lines
2.1 KiB
LLVM
63 lines
2.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; REQUIRES: asserts
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; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -indvars -loop-simplifycfg -verify-loop-info -verify-dom-info -verify-loop-lcssa 2>&1 < %s | FileCheck %s
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; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -passes='require<domtree>,loop(indvars,simplify-cfg)' -verify-loop-info -verify-dom-info -verify-loop-lcssa 2>&1 < %s | FileCheck %s
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; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -indvars -loop-simplifycfg -enable-mssa-loop-dependency=true -verify-memoryssa -verify-loop-info -verify-dom-info -verify-loop-lcssa 2>&1 < %s | FileCheck %s
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define void @test(i1 %c) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: switch i32 0, label [[ENTRY_SPLIT:%.*]] [
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; CHECK-NEXT: i32 1, label [[DEAD_EXIT:%.*]]
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; CHECK-NEXT: ]
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; CHECK: entry.split:
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; CHECK-NEXT: br label [[OUTER:%.*]]
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; CHECK: outer:
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; CHECK-NEXT: br i1 [[C:%.*]], label [[TO_FOLD:%.*]], label [[LATCH:%.*]]
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; CHECK: to_fold:
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; CHECK-NEXT: br i1 [[C]], label [[LATCH]], label [[INNER_PREHEADER:%.*]]
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; CHECK: inner.preheader:
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; CHECK-NEXT: br label [[INNER:%.*]]
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; CHECK: inner:
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; CHECK-NEXT: br i1 false, label [[INNER_LATCH:%.*]], label [[UNDEAD:%.*]]
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; CHECK: inner_latch:
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; CHECK-NEXT: br i1 true, label [[INNER]], label [[LATCH_LOOPEXIT:%.*]]
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; CHECK: undead:
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; CHECK-NEXT: br label [[LATCH]]
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; CHECK: latch.loopexit:
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; CHECK-NEXT: br label [[LATCH]]
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; CHECK: latch:
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; CHECK-NEXT: br label [[OUTER]]
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; CHECK: dead_exit:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %outer
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outer:
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br i1 %c, label %to_fold, label %latch
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to_fold:
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br i1 %c, label %latch, label %inner
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inner:
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%iv = phi i32 [0, %to_fold], [%iv.next, %inner_latch]
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%never = icmp sgt i32 %iv, 40
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br i1 %never, label %inner_latch, label %undead
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inner_latch:
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%iv.next = add i32 %iv, 1
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%cmp = icmp slt i32 %iv.next, 10
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br i1 %cmp, label %inner, label %latch
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undead:
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br label %latch
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latch:
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br i1 true, label %outer, label %dead_exit
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dead_exit:
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ret void
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}
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