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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes='loop(loop-rotate,loop-deletion)' -S | FileCheck %s
target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
define void @main() {
; CHECK-LABEL: @main(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[L0_PREHEADER:%.*]]
; CHECK: L0.L0.preheader.loopexit_crit_edge:
; CHECK-NEXT: br label [[L0_PREHEADER_LOOPEXIT:%.*]]
; CHECK: L0.preheader.loopexit:
; CHECK-NEXT: br label [[L0_PREHEADER]]
; CHECK: L0.preheader:
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 0, 0
; CHECK-NEXT: [[INC:%.*]] = zext i1 [[CMP]] to i32
; CHECK-NEXT: [[TOBOOL3_NOT1:%.*]] = icmp eq i32 [[INC]], 0
; CHECK-NEXT: br i1 [[TOBOOL3_NOT1]], label [[L0_PREHEADER_LOOPEXIT]], label [[L1_PREHEADER_LR_PH:%.*]]
; CHECK: L1.preheader.lr.ph:
; CHECK-NEXT: br label [[L1_PREHEADER:%.*]]
; CHECK: L1.preheader:
; CHECK-NEXT: [[SPEC_SELECT3:%.*]] = phi i32 [ [[INC]], [[L1_PREHEADER_LR_PH]] ], [ [[SPEC_SELECT:%.*]], [[L0_LATCH:%.*]] ]
; CHECK-NEXT: [[K_02:%.*]] = phi i32 [ 0, [[L1_PREHEADER_LR_PH]] ], [ [[SPEC_SELECT3]], [[L0_LATCH]] ]
; CHECK-NEXT: [[TOBOOL8_NOT:%.*]] = icmp eq i32 [[K_02]], 0
; CHECK-NEXT: br label [[L0_LATCH]]
; CHECK: L0.latch:
; CHECK-NEXT: [[SPEC_SELECT]] = add nsw i32 [[SPEC_SELECT3]], [[INC]]
; CHECK-NEXT: [[TOBOOL3_NOT:%.*]] = icmp eq i32 [[SPEC_SELECT]], 0
; CHECK-NEXT: br i1 [[TOBOOL3_NOT]], label [[L0_L0_PREHEADER_LOOPEXIT_CRIT_EDGE:%.*]], label [[L1_PREHEADER]]
;
entry:
br label %L0.preheader
L0.preheader:
br label %L0
L0: ; preds = %L0.latch, %L0.preheader
%k.0 = phi i32 [ 0, %L0.preheader ], [ %spec.select, %L0.latch ]
%cmp = icmp slt i32 0, 0
%inc = zext i1 %cmp to i32
%spec.select = add nsw i32 %k.0, %inc
%tobool3.not = icmp eq i32 %spec.select, 0
br i1 %tobool3.not, label %L0.preheader, label %L1.preheader
L1.preheader:
%tobool8.not = icmp eq i32 %k.0, 0
br label %L1
L1:
br i1 %tobool8.not, label %L1.latch, label %L0.latch
L1.latch:
br i1 false, label %L1, label %L0.latch
L0.latch:
br label %L0
}
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