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
4 ; Test case for PR47557.
6 ; REQUIRES: x86-registered-target
8 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
9 target triple = "x86_64-unknown-linux-gnu"
11 @a = external global i32, align 4
12 @c = external global [1 x i32], align 4
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:%.*]]
22 ; CHECK-NEXT: br label [[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]]
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]]
36 entry: ; preds = %entry
39 for.cond: ; preds = %cleanup, %entry
40 %storemerge = phi i64 [ 0, %entry ], [ %inc7, %cleanup ]
43 for.body3: ; preds = %for.cond2.2, %for.cond2.1
44 %arrayidx = getelementptr inbounds [1 x i32], ptr @c, i64 0, i64 %storemerge
47 cleanup: ; preds = %for.end5, %if.then
48 %inc7 = add nsw i64 %storemerge, 1
51 for.cond2.1: ; preds = %for.cond
52 br i1 true, label %for.inc.1, label %for.body3
54 for.inc.1: ; preds = %for.end.1
55 br i1 false, label %for.body.2, label %cleanup
57 for.body.2: ; preds = %for.inc.1
58 store i32 0, ptr @a, align 4
61 for.cond2.2: ; preds = %for.body.2
62 br i1 true, label %cleanup, label %for.body3