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;=========================== begin_copyright_notice ============================
;
; Copyright (C) 2022 Intel Corporation
;
; SPDX-License-Identifier: MIT
;
;============================ end_copyright_notice =============================
; RUN: igc_opt %s -S -o - -igc-remat-address-arithmetic | FileCheck %s
; This unit test only checks if pass is able to deal with infinite loops of uses in "phi" function
; Function pattern - infinite loop using %privateBase
;
; kernel void foo(int cond) {
; int x = 0;
; if(cond>0)
; for(int i=0;;i++)
; x = i;
; }
define spir_kernel void @foo(i8* %privateBase, i32 %cond) {
; CHECK: [[BASE:%.*]] = ptrtoint i8* %privateBase to i64
%base = ptrtoint i8* %privateBase to i64
; CHECK: [[OFFSET:%.*]] = add i64 [[BASE]], 8
%offset = add i64 %base, 8
%ptr1 = inttoptr i64 %offset to i32*
store i32 1, i32* %ptr1, align 4
%compare = icmp sgt i32 %cond, 0
br i1 %compare, label %enter, label %exit
enter:
br label %loop
loop:
%indvar = phi i32 [ 0, %enter ], [ %nextindvar, %loop ]
%nextindvar = add i32 %indvar, 1
; CHECK: [[PTR:%.*]] = inttoptr i64 [[OFFSET]] to i32
%ptr2 = inttoptr i64 %offset to i32*
store i32 %nextindvar, i32* %ptr2, align 4
br label %loop
exit:
ret void
}
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