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;=========================== begin_copyright_notice ============================
;
; Copyright (C) 2023-2024 Intel Corporation
;
; SPDX-License-Identifier: MIT
;
;============================ end_copyright_notice =============================
; REQUIRES: opaque-ptr-fix, llvm-14-plus
; RUN: igc_opt --opaque-pointers -debugify --igc-gep-loop-strength-reduction -check-debugify -S < %s 2>&1 | FileCheck %s
;
; Input:
;
; struct Foo {
; int bar[100];
; };
; kernel void test(global struct Foo* p, int n) {
; for (int i = 0; i < n; i+=2) {
; p->bar[i+1] = p->bar[i];
; }
; }
;
; GEP has multiple indices, but only the last one is variable. Change GEP
; into pointer to accessed type and add it as induction variable. Output:
;
; kernel void test(global struct Foo* p, int n) {
; global int* tmp = p->bar;
; for (int i = 0; i < n; i+=2, tmp+=2) {
; *(tmp+1) = *tmp;
; }
; }
; Debug-info related check
; CHECK: CheckModuleDebugify: PASS
%struct.Foo = type { [100 x i32] }
define spir_kernel void @test(%struct.Foo addrspace(1)* %p, i32 %n) {
entry:
%cmp1 = icmp slt i32 0, %n
br i1 %cmp1, label %for.body.lr.ph, label %for.end
; CHECK-LABEL: for.body.lr.ph:
; CHECK: [[GEP_PHI1:%.*]] = getelementptr %struct.Foo, %struct.Foo addrspace(1)* %p, i64 0, i32 0, i64 0
; CHECK: br label %for.body
for.body.lr.ph: ; preds = %entry
br label %for.body
; CHECK-LABEL: for.body:
; CHECK: [[GEP0:%.*]] = phi i32 addrspace(1)* [ [[GEP_PHI1]], %for.body.lr.ph ], [ [[GEP_PHI2:%.*]], %for.body ]
; CHECK: %i.02 = phi i32 [ 0, %for.body.lr.ph ], [ %add4, %for.body ]
; CHECK-NOT: zext
; CHECK-NOT: getelementptr inbounds %struct.Foo, %struct.Foo addrspace(1)* %p
; CHECK: [[LOAD:%.*]] = load i32, i32 addrspace(1)* [[GEP0]], align 4
; CHECK-NOT: or {i32|i64}
; CHECK-NOT: zext
; CHECK-NOT: getelementptr inbounds %struct.Foo, %struct.Foo addrspace(1)* %p
; CHECK: [[GEP1:%.*]] = getelementptr i32, i32 addrspace(1)* [[GEP0]], i64 1
; CHECK: store i32 [[LOAD]], i32 addrspace(1)* [[GEP1]], align 4
; CHECK: %add4 = add nuw nsw i32 %i.02, 2
; CHECK: %cmp = icmp slt i32 %add4, %n
; CHECK: [[GEP_PHI2]] = getelementptr i32, i32 addrspace(1)* [[GEP0]], i64 2
; CHECK: br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
for.body: ; preds = %for.body.lr.ph, %for.body
%i.02 = phi i32 [ 0, %for.body.lr.ph ], [ %add4, %for.body ]
%idxprom = zext i32 %i.02 to i64
%arrayidx = getelementptr inbounds %struct.Foo, %struct.Foo addrspace(1)* %p, i64 0, i32 0, i64 %idxprom
%0 = load i32, i32 addrspace(1)* %arrayidx, align 4
%add = or i32 %i.02, 1
%idxprom2 = zext i32 %add to i64
%arrayidx3 = getelementptr inbounds %struct.Foo, %struct.Foo addrspace(1)* %p, i64 0, i32 0, i64 %idxprom2
store i32 %0, i32 addrspace(1)* %arrayidx3, align 4
%add4 = add nuw nsw i32 %i.02, 2
%cmp = icmp slt i32 %add4, %n
br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
for.cond.for.end_crit_edge: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.cond.for.end_crit_edge, %entry
ret void
}
!igc.functions = !{!0}
!0 = !{void (%struct.Foo addrspace(1)*, i32)* @test, !1}
!1 = !{!2}
!2 = !{!"function_type", i32 0}
|
