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;=========================== begin_copyright_notice ============================
;
; Copyright (C) 2022 Intel Corporation
;
; SPDX-License-Identifier: MIT
;
;============================ end_copyright_notice =============================
;
; RUN: igc_opt --igc-loop-canonicalization -S < %s | FileCheck %s
; ------------------------------------------------
; LoopCanonicalization
; ------------------------------------------------
define spir_kernel void @test_loop(i32* %a, i32* %b, i32 %c) {
; CHECK-LABEL: @test_loop(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP_0:%.*]] = icmp eq i32* %a, %b
; CHECK-NEXT: br i1 [[CMP_0]], label [[FOR_END:%.*]], label [[FOR_BODY_PREHEADER:%.*]]
; CHECK: for.body.preheader:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[P_0:%.*]] = phi i32* [ %a, [[FOR_BODY_PREHEADER]] ], [ [[P_0_BE:%.*]], [[FOR_BODY_BACKEDGE:%.*]] ]
; CHECK-NEXT: [[P_1:%.*]] = phi i32 [ 42, [[FOR_BODY_PREHEADER]] ], [ [[P_1]], [[FOR_BODY_BACKEDGE]] ]
; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* [[P_0]], align 4
; CHECK-NEXT: [[CMP_1:%.*]] = icmp eq i32 [[TMP0]], [[P_1]]
; CHECK-NEXT: br i1 [[CMP_1]], label [[FOR_IF:%.*]], label [[FOR_ELSE:%.*]]
; CHECK: for.if:
; CHECK-NEXT: br label [[FOR_BODY_BACKEDGE]]
; CHECK: for.body.backedge:
; CHECK-NEXT: [[P_0_BE]] = phi i32* [ [[INC_P:%.*]], [[FOR_ELSE]] ], [ %b, [[FOR_IF]] ]
; CHECK-NEXT: br label [[FOR_BODY]]
; CHECK: for.else:
; CHECK-NEXT: [[INC_P]] = getelementptr inbounds i32, i32* [[P_0]], i64 1
; CHECK-NEXT: [[CMP_2:%.*]] = icmp eq i32* [[INC_P]], %b
; CHECK-NEXT: br i1 [[CMP_2]], label [[FOR_END]], label [[FOR_BODY_BACKEDGE]]
; CHECK: for.end:
; CHECK-NEXT: [[P_3:%.*]] = phi i32 [ %c, [[ENTRY:%.*]] ], [ [[TMP0]], [[FOR_ELSE]] ]
; CHECK-NEXT: store i32 [[P_3]], i32* %a
; CHECK-NEXT: ret void
;
entry:
%cmp.0 = icmp eq i32* %a, %b
br i1 %cmp.0, label %for.end, label %for.body
for.body:
%p.0 = phi i32* [ %inc.p, %for.else ], [ %a, %entry ], [ %b, %for.if ]
%p.1 = phi i32 [ 42, %entry ], [ %p.1, %for.else ], [ %p.1, %for.if ]
%0 = load i32, i32* %p.0, align 4
%cmp.1 = icmp eq i32 %0, %p.1
br i1 %cmp.1, label %for.if, label %for.else
for.if:
br label %for.body
for.else:
%inc.p = getelementptr inbounds i32, i32* %p.0, i64 1
%cmp.2 = icmp eq i32* %inc.p, %b
br i1 %cmp.2, label %for.end, label %for.body
for.end:
%p.3 = phi i32 [%c, %entry], [%0, %for.else]
store i32 %p.3, i32* %a
ret void
}
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