1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -S -loop-reduce < %s | FileCheck %s
4 ; Test an assertion failure from D113349, where the SCEV for the outer phi
5 ; gets computed and registered in the value map while attempting to compute it.
7 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
8 target triple = "x86_64-unknown-linux-gnu"
13 ; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
15 ; CHECK-NEXT: [[LSR_IV:%.*]] = phi ptr [ [[SCEVGEP:%.*]], [[LOOP_LATCH:%.*]] ], [ inttoptr (i64 -8 to ptr), [[ENTRY:%.*]] ]
16 ; CHECK-NEXT: br i1 true, label [[LOOP_EXIT:%.*]], label [[LOOP2_PREHEADER:%.*]]
18 ; CHECK-NEXT: ret void
19 ; CHECK: loop2.preheader:
20 ; CHECK-NEXT: br label [[LOOP2_HEADER:%.*]]
21 ; CHECK: loop2.header:
22 ; CHECK-NEXT: [[LSR_IV1:%.*]] = phi ptr [ [[SCEVGEP2:%.*]], [[LOOP2_HEADER]] ], [ [[LSR_IV]], [[LOOP2_PREHEADER]] ]
23 ; CHECK-NEXT: [[SCEVGEP2]] = getelementptr i8, ptr [[LSR_IV1]], i64 8
24 ; CHECK-NEXT: br i1 false, label [[LOOP2_HEADER]], label [[LOOP2_CONT:%.*]]
26 ; CHECK-NEXT: [[V:%.*]] = load i8, ptr [[SCEVGEP2]], align 1
27 ; CHECK-NEXT: [[C:%.*]] = icmp ne i8 [[V]], 0
28 ; CHECK-NEXT: br i1 [[C]], label [[LOOP_EXIT]], label [[LOOP_LATCH]]
30 ; CHECK-NEXT: [[SCEVGEP]] = getelementptr i8, ptr [[LSR_IV]], i64 8
31 ; CHECK-NEXT: br label [[LOOP_HEADER]]
37 %ptr = phi ptr [ %ptr.next, %loop.latch ], [ null, %entry ]
38 br i1 true, label %loop.exit, label %loop2.preheader
44 br label %loop2.header
47 %ptr2 = phi ptr [ %ptr, %loop2.preheader ], [ %ptr2.next, %loop2.header ]
48 %ptr2.next = getelementptr inbounds i64, ptr %ptr2, i64 1
49 br i1 false, label %loop2.header, label %loop2.cont
52 %v = load i8, ptr %ptr2
54 br i1 %c, label %loop.exit, label %loop.latch
57 %ptr.next = getelementptr inbounds i64, ptr %ptr, i64 1