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;=========================== begin_copyright_notice ============================
;
; Copyright (C) 2023-2025 Intel Corporation
;
; SPDX-License-Identifier: MIT
;
;============================ end_copyright_notice =============================
; REQUIRES: opaque-ptr-fix, llvm-14-plus
; RUN: igc_opt --opaque-pointers --igc-gep-loop-strength-reduction -S < %s 2>&1 | FileCheck %s
;
; SCEV expression is:
; { %a + %b, +, 1 } + %a
;
; Expression can be changed to:
; { 2 * %a + %b, +, 1 }
;
; The problem is that %a is i1 type + zext. Make sure zext is correctly preserved.
define spir_kernel void @test(i32 addrspace(1)* %p, i32 %n, i1 %a, i32 %b) {
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: %0 = zext i1 %a to i64
; CHECK: %1 = zext i1 %a to i32
; CHECK: %2 = add i32 %b, %1
; CHECK: %3 = zext i32 %2 to i64
; CHECK: %4 = add i64 %0, %3
; CHECK: %5 = getelementptr i32, i32 addrspace(1)* %p, i64 %4
; CHECK: br label %for.body
for.body.lr.ph: ; preds = %entry
br label %for.body
; CHECK-LABEL: for.body:
; CHECK: %6 = phi i32 addrspace(1)* [ %5, %for.body.lr.ph ], [ %7, %for.body ]
; CHECK: %i.02 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
; CHECK: store i32 %i.02, i32 addrspace(1)* %6, align 4
; CHECK: %inc = add nuw nsw i32 %i.02, 1
; CHECK: %cmp = icmp slt i32 %inc, %n
; CHECK: %7 = getelementptr i32, i32 addrspace(1)* %6, i64 1
; 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 ], [ %inc, %for.body ]
%a2 = zext i1 %a to i32
%add_ab = add nsw i32 %a2, %b
%add1 = add nsw i32 %i.02, %add_ab
%zext1 = zext i32 %add1 to i64
%zext2 = zext i32 %a2 to i64
%add2 = add nsw i64 %zext1, %zext2
%arrayidx = getelementptr inbounds i32, i32 addrspace(1)* %p, i64 %add2
store i32 %i.02, i32 addrspace(1)* %arrayidx, align 4
%inc = add nuw nsw i32 %i.02, 1
%cmp = icmp slt i32 %inc, %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 (i32 addrspace(1)*, i32, i1, i32)* @test, !1}
!1 = !{!2}
!2 = !{!"function_type", i32 0}
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