1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -passes='loop-mssa(simple-loop-unswitch<nontrivial>,loop-reduce,loop-simplifycfg)' -verify-memoryssa -S %s | FileCheck %s 3 4; Test case for PR47557. 5 6; REQUIRES: x86-registered-target 7 8target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 9target triple = "x86_64-unknown-linux-gnu" 10 11@a = external global i32, align 4 12@c = external global [1 x i32], align 4 13 14define ptr @test() { 15; CHECK-LABEL: @test( 16; CHECK-NEXT: entry: 17; CHECK-NEXT: switch i32 0, label [[ENTRY_SPLIT:%.*]] [ 18; CHECK-NEXT: i32 1, label [[FOR_BODY3SPLIT:%.*]] 19; CHECK-NEXT: i32 2, label [[FOR_COND2_2_FOR_BODY3_CRIT_EDGE:%.*]] 20; CHECK-NEXT: ] 21; CHECK: entry.split: 22; CHECK-NEXT: br label [[FOR_COND:%.*]] 23; CHECK: for.cond: 24; CHECK-NEXT: [[STOREMERGE:%.*]] = phi i64 [ 0, [[ENTRY_SPLIT]] ], [ [[INC7:%.*]], [[FOR_COND]] ] 25; CHECK-NEXT: [[INC7]] = add nsw i64 [[STOREMERGE]], 1 26; CHECK-NEXT: br label [[FOR_COND]] 27; CHECK: for.body3split: 28; CHECK-NEXT: br label [[FOR_BODY3:%.*]] 29; CHECK: for.cond2.2.for.body3_crit_edge: 30; CHECK-NEXT: br label [[FOR_BODY3]] 31; CHECK: for.body3: 32; CHECK-NEXT: [[STOREMERGE_LCSSA:%.*]] = phi i64 [ poison, [[FOR_COND2_2_FOR_BODY3_CRIT_EDGE]] ], [ poison, [[FOR_BODY3SPLIT]] ] 33; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [1 x i32], ptr @c, i64 0, i64 [[STOREMERGE_LCSSA]] 34; CHECK-NEXT: ret ptr [[ARRAYIDX]] 35; 36entry: ; preds = %entry 37 br label %for.cond 38 39for.cond: ; preds = %cleanup, %entry 40 %storemerge = phi i64 [ 0, %entry ], [ %inc7, %cleanup ] 41 br label %for.cond2.1 42 43for.body3: ; preds = %for.cond2.2, %for.cond2.1 44 %arrayidx = getelementptr inbounds [1 x i32], ptr @c, i64 0, i64 %storemerge 45 ret ptr %arrayidx 46 47cleanup: ; preds = %for.end5, %if.then 48 %inc7 = add nsw i64 %storemerge, 1 49 br label %for.cond 50 51for.cond2.1: ; preds = %for.cond 52 br i1 true, label %for.inc.1, label %for.body3 53 54for.inc.1: ; preds = %for.end.1 55 br i1 false, label %for.body.2, label %cleanup 56 57for.body.2: ; preds = %for.inc.1 58 store i32 0, ptr @a, align 4 59 br label %for.cond2.2 60 61for.cond2.2: ; preds = %for.body.2 62 br i1 true, label %cleanup, label %for.body3 63} 64