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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=loop-idiom -S %s | FileCheck %s
define void @phi_insertion(i1 %c, ptr %ptr.start, ptr %ptr.end, i64 %offset) {
; CHECK-LABEL: @phi_insertion(
; CHECK-NEXT: bb5:
; CHECK-NEXT: br i1 [[C:%.*]], label [[LOOP_0_PH:%.*]], label [[EXIT:%.*]]
; CHECK: loop.0.ph:
; CHECK-NEXT: br label [[LOOP_0:%.*]]
; CHECK: loop.0:
; CHECK-NEXT: [[IV_0:%.*]] = phi ptr [ [[IV_0_NEXT:%.*]], [[LOOP_0_LATCH:%.*]] ], [ [[PTR_START:%.*]], [[LOOP_0_PH]] ]
; CHECK-NEXT: [[COND:%.*]] = icmp eq ptr [[IV_0]], [[PTR_END:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[LOOP_1_PREHEADER:%.*]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK: loop.1.preheader:
; CHECK-NEXT: br label [[LOOP_1:%.*]]
; CHECK: loop.1:
; CHECK-NEXT: [[PTR_1:%.*]] = getelementptr inbounds i32, ptr [[IV_0]], i64 0
; CHECK-NEXT: [[LV:%.*]] = load i32, ptr [[PTR_1]], align 8
; CHECK-NEXT: [[PTR_2:%.*]] = getelementptr inbounds i32, ptr [[IV_0]], i64 0
; CHECK-NEXT: store i32 [[LV]], ptr [[PTR_2]], align 8
; CHECK-NEXT: [[IV_1_NEXT:%.*]] = add nuw nsw i64 0, 1
; CHECK-NEXT: [[EC:%.*]] = icmp eq i64 [[IV_1_NEXT]], 100
; CHECK-NEXT: br i1 [[EC]], label [[LOOP_0_LATCH]], label [[LOOP_1]]
; CHECK: loop.0.latch:
; CHECK-NEXT: [[IV_0_NEXT]] = getelementptr inbounds i32, ptr [[IV_0]], i64 [[OFFSET:%.*]]
; CHECK-NEXT: br label [[LOOP_0]]
; CHECK: exit.loopexit:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
bb5:
br i1 %c, label %loop.0.ph, label %exit
loop.0.ph: ; preds = %bb5
br label %loop.0
loop.0: ; preds = %loop.0.latch, %loop.0.ph
%iv.0 = phi ptr [ %iv.0.next, %loop.0.latch ], [ %ptr.start, %loop.0.ph ]
%cond = icmp eq ptr %iv.0, %ptr.end
br i1 %cond, label %loop.1, label %exit
loop.1: ; preds = %loop.1, %loop.0
%iv.1 = phi i64 [ 0, %loop.0 ], [ %iv.1, %loop.1 ]
%ptr.1 = getelementptr inbounds i32, ptr %iv.0, i64 %iv.1
%lv = load i32, ptr %ptr.1, align 8
%ptr.2 = getelementptr inbounds i32, ptr %iv.0, i64 %iv.1
store i32 %lv, ptr %ptr.2, align 8
%iv.1.next = add nuw nsw i64 %iv.1, 1
%ec = icmp eq i64 %iv.1.next, 100
br i1 %ec, label %loop.0.latch, label %loop.1
loop.0.latch: ; preds = %loop.1
%iv.0.next = getelementptr inbounds i32, ptr %iv.0, i64 %offset
br label %loop.0
exit: ; preds = %loop.0, %bb5
ret void
}
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