reduction_looprotate_hoisted.ll
4.77 KB
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; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-invariant-load-hoisting -polly-flatten-schedule -polly-delicm-overapproximate-writes=true -polly-delicm-compute-known=true -polly-delicm -analyze < %s | FileCheck %s
;
; void func(int *A, int* StartPtr) {
; for (int j = 0; j < 2; j += 1) { /* outer */
; int Start = *Startptr;
; int phi = Start;
; for (int i = Start; i < 4; i += 1) /* reduction */
; phi += 42;
; A[j] = phi;
; }
; }
;
define void @func(i32* noalias nonnull %A, i32* noalias nonnull %StartPtr) {
entry:
br label %outer.preheader
outer.preheader:
br label %outer.for
outer.for:
%j = phi i32 [0, %outer.preheader], [%j.inc, %outer.inc]
%j.cmp = icmp slt i32 %j, 2
br i1 %j.cmp, label %reduction.preheader, label %outer.exit
reduction.preheader:
%Start = load i32, i32* %StartPtr
br label %reduction.for
reduction.for:
%i = phi i32 [%Start, %reduction.preheader], [%i.inc, %reduction.inc]
%phi = phi i32 [%Start, %reduction.preheader], [%mul, %reduction.inc]
br label %body
body:
%mul = mul i32 %phi, 2
br label %reduction.inc
reduction.inc:
%i.inc = add nuw nsw i32 %i, 1
%i.cmp = icmp slt i32 %i.inc, 4
br i1 %i.cmp, label %reduction.for, label %reduction.exit
reduction.exit:
%A_idx = getelementptr inbounds i32, i32* %A, i32 %j
store i32 %mul, i32* %A_idx
br label %outer.inc
outer.inc:
%j.inc = add nuw nsw i32 %j, 1
br label %outer.for
outer.exit:
br label %return
return:
ret void
}
; FIXME: The accesses for %i should not be there because, with
; load-hoisting %Start is an affine loop. To be fixed in ScopBuilder.
; CHECK: After accesses {
; CHECK-NEXT: Stmt_reduction_preheader
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: [Start] -> { Stmt_reduction_preheader[i0] -> MemRef_phi__phi[] };
; CHECK-NEXT: new: [Start] -> { Stmt_reduction_preheader[i0] -> MemRef_A[i0] : Start >= 2147483648 or Start <= 2147483646 };
; CHECK-NEXT: Stmt_reduction_for
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: [Start] -> { Stmt_reduction_for[i0, i1] -> MemRef_phi__phi[] };
; CHECK-NEXT: new: [Start] -> { Stmt_reduction_for[i0, i1] -> MemRef_A[i0] : -i0 < i1 <= 3 - Start; Stmt_reduction_for[1, 0] -> MemRef_A[1] : Start >= 4; Stmt_reduction_for[0, 0] -> MemRef_A[0] };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: [Start] -> { Stmt_reduction_for[i0, i1] -> MemRef_phi[] };
; CHECK-NEXT: new: [Start] -> { Stmt_reduction_for[i0, i1] -> MemRef_A[i0] : i0 <= i1 <= 3 - Start; Stmt_reduction_for[i0, 0] -> MemRef_A[i0] : i0 <= -4 + Start; Stmt_reduction_for[1, 0] -> MemRef_A[1] : Start <= 4 }
; CHECK-NEXT: Stmt_body
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: [Start] -> { Stmt_body[i0, i1] -> MemRef_mul[] };
; CHECK-NEXT: new: [Start] -> { Stmt_body[i0, i1] -> MemRef_A[i0] : i0 <= i1 <= 3 - Start; Stmt_body[i0, 0] -> MemRef_A[i0] : i0 <= -4 + Start; Stmt_body[1, 0] -> MemRef_A[1] : Start <= 4 }
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: [Start] -> { Stmt_body[i0, i1] -> MemRef_phi[] };
; CHECK-NEXT: new: [Start] -> { Stmt_body[i0, i1] -> MemRef_A[i0] : i0 <= i1 <= 3 - Start; Stmt_body[1, 0] -> MemRef_A[1]; Stmt_body[0, 0] -> MemRef_A[0] : Start >= 4 };
; CHECK-NEXT: Stmt_reduction_inc
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: [Start] -> { Stmt_reduction_inc[i0, i1] -> MemRef_mul[] };
; CHECK-NEXT: new: [Start] -> { Stmt_reduction_inc[i0, i1] -> MemRef_A[i0] : i0 <= i1 <= 3 - Start; Stmt_reduction_inc[1, 0] -> MemRef_A[1]; Stmt_reduction_inc[0, 0] -> MemRef_A[0] : Start >= 4 };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: [Start] -> { Stmt_reduction_inc[i0, i1] -> MemRef_phi__phi[] };
; CHECK-NEXT: new: [Start] -> { Stmt_reduction_inc[i0, i1] -> MemRef_A[i0] : 0 < i1 <= 3 - Start; Stmt_reduction_inc[i0, 0] -> MemRef_A[i0] }
; CHECK-NEXT: Stmt_reduction_exit
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: [Start] -> { Stmt_reduction_exit[i0] -> MemRef_A[i0] };
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: [Start] -> { Stmt_reduction_exit[i0] -> MemRef_mul[] };
; CHECK-NEXT: new: [Start] -> { Stmt_reduction_exit[i0] -> MemRef_A[i0] };
; CHECK-NEXT: }