reduction_overapproximate.ll
7.89 KB
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; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-flatten-schedule -polly-delicm-compute-known=true -polly-delicm-overapproximate-writes=true -polly-delicm-partial-writes=false -polly-delicm -analyze < %s | FileCheck %s --check-prefix=APPROX
; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-flatten-schedule -polly-delicm-compute-known=true -polly-delicm-overapproximate-writes=false -polly-delicm-partial-writes=false -polly-delicm -analyze < %s | FileCheck %s --check-prefix=EXACT
; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-flatten-schedule -polly-delicm-compute-known=true -polly-delicm-partial-writes=true -polly-delicm -analyze < %s | FileCheck %s --check-prefix=PARTIAL
;
; void func(double *A {
; for (int j = -1; j < 3; j += 1) { /* outer */
; double phi = 0.0;
; if (0 < j)
; for (int i = 0; i < j; i += 1) /* reduction */
; phi += 4.2;
; A[j] = phi;
; }
; }
;
define void @func(double* noalias nonnull %A) {
entry:
br label %outer.preheader
outer.preheader:
br label %outer.for
outer.for:
%j = phi i32 [-1, %outer.preheader], [%j.inc, %outer.inc]
%j.cmp = icmp slt i32 %j, 3
br i1 %j.cmp, label %reduction.checkloop, label %outer.exit
reduction.checkloop:
%j2.cmp = icmp slt i32 0, %j
br i1 %j2.cmp, label %reduction.preheader, label %reduction.exit
reduction.preheader:
br label %reduction.for
reduction.for:
%i = phi i32 [0, %reduction.preheader], [%i.inc, %reduction.inc]
%phi = phi double [0.0, %reduction.preheader], [%add, %reduction.inc]
br label %body
body:
%add = fadd double %phi, 4.2
br label %reduction.inc
reduction.inc:
%i.inc = add nuw nsw i32 %i, 1
%i.cmp = icmp slt i32 %i.inc, %j
br i1 %i.cmp, label %reduction.for, label %reduction.exit
reduction.exit:
%val = phi double [%add, %reduction.inc], [0.0, %reduction.checkloop]
%A_idx = getelementptr inbounds double, double* %A, i32 %j
store double %val, double* %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
}
; APPROX: After accesses {
; APPROX-NEXT: Stmt_reduction_checkloop
; APPROX-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; APPROX-NEXT: { Stmt_reduction_checkloop[i0] -> MemRef_val__phi[] };
; APPROX-NEXT: new: { Stmt_reduction_checkloop[i0] -> MemRef_A[-1 + i0] };
; APPROX-NEXT: Stmt_reduction_preheader
; APPROX-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; APPROX-NEXT: { Stmt_reduction_preheader[i0] -> MemRef_phi__phi[] };
; APPROX-NEXT: new: { Stmt_reduction_preheader[i0] -> MemRef_A[-1 + i0] };
; APPROX-NEXT: Stmt_reduction_for
; APPROX-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; APPROX-NEXT: { Stmt_reduction_for[i0, i1] -> MemRef_phi__phi[] };
; APPROX-NEXT: new: { Stmt_reduction_for[i0, i1] -> MemRef_A[-1 + i0] };
; APPROX-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; APPROX-NEXT: { Stmt_reduction_for[i0, i1] -> MemRef_phi[] };
; APPROX-NEXT: new: { Stmt_reduction_for[i0, i1] -> MemRef_A[-1 + i0] };
; APPROX-NEXT: Stmt_body
; APPROX-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; APPROX-NEXT: { Stmt_body[i0, i1] -> MemRef_add[] };
; APPROX-NEXT: new: { Stmt_body[i0, i1] -> MemRef_A[-1 + i0] };
; APPROX-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; APPROX-NEXT: { Stmt_body[i0, i1] -> MemRef_phi[] };
; APPROX-NEXT: new: { Stmt_body[i0, i1] -> MemRef_A[-1 + i0] };
; APPROX-NEXT: Stmt_reduction_inc
; APPROX-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; APPROX-NEXT: { Stmt_reduction_inc[i0, i1] -> MemRef_add[] };
; APPROX-NEXT: new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[-1 + i0] };
; APPROX-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; APPROX-NEXT: { Stmt_reduction_inc[i0, i1] -> MemRef_phi__phi[] };
; APPROX-NEXT: new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[2] };
; APPROX-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; APPROX-NEXT: { Stmt_reduction_inc[i0, i1] -> MemRef_val__phi[] };
; APPROX-NEXT: new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[-1 + i0] };
; APPROX-NEXT: Stmt_reduction_exit
; APPROX-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; APPROX-NEXT: { Stmt_reduction_exit[i0] -> MemRef_val__phi[] };
; APPROX-NEXT: new: { Stmt_reduction_exit[i0] -> MemRef_A[-1 + i0] };
; APPROX-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
; APPROX-NEXT: { Stmt_reduction_exit[i0] -> MemRef_A[-1 + i0] };
; APPROX-NEXT: }
; EXACT: No modification has been made
; PARTIAL: After accesses {
; PARTIAL-NEXT: Stmt_reduction_checkloop
; PARTIAL-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; PARTIAL-NEXT: { Stmt_reduction_checkloop[i0] -> MemRef_val__phi[] };
; PARTIAL-NEXT: new: { Stmt_reduction_checkloop[i0] -> MemRef_A[-1 + i0] : i0 <= 1 };
; PARTIAL-NEXT: Stmt_reduction_preheader
; PARTIAL-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; PARTIAL-NEXT: { Stmt_reduction_preheader[i0] -> MemRef_phi__phi[] };
; PARTIAL-NEXT: new: { Stmt_reduction_preheader[i0] -> MemRef_A[-1 + i0] };
; PARTIAL-NEXT: Stmt_reduction_for
; PARTIAL-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; PARTIAL-NEXT: { Stmt_reduction_for[i0, i1] -> MemRef_phi__phi[] };
; PARTIAL-NEXT: new: { Stmt_reduction_for[i0, i1] -> MemRef_A[-1 + i0] };
; PARTIAL-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; PARTIAL-NEXT: { Stmt_reduction_for[i0, i1] -> MemRef_phi[] };
; PARTIAL-NEXT: new: { Stmt_reduction_for[i0, i1] -> MemRef_A[-1 + i0] };
; PARTIAL-NEXT: Stmt_body
; PARTIAL-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; PARTIAL-NEXT: { Stmt_body[i0, i1] -> MemRef_add[] };
; PARTIAL-NEXT: new: { Stmt_body[i0, i1] -> MemRef_A[-1 + i0] };
; PARTIAL-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; PARTIAL-NEXT: { Stmt_body[i0, i1] -> MemRef_phi[] };
; PARTIAL-NEXT: new: { Stmt_body[i0, i1] -> MemRef_A[-1 + i0] };
; PARTIAL-NEXT: Stmt_reduction_inc
; PARTIAL-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; PARTIAL-NEXT: { Stmt_reduction_inc[i0, i1] -> MemRef_add[] };
; PARTIAL-NEXT: new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[-1 + i0] };
; PARTIAL-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; PARTIAL-NEXT: { Stmt_reduction_inc[i0, i1] -> MemRef_phi__phi[] };
; PARTIAL-NEXT: new: { Stmt_reduction_inc[3, 0] -> MemRef_A[2] };
; PARTIAL-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; PARTIAL-NEXT: { Stmt_reduction_inc[i0, i1] -> MemRef_val__phi[] };
; PARTIAL-NEXT: new: { Stmt_reduction_inc[i0, -2 + i0] -> MemRef_A[-1 + i0] };
; PARTIAL-NEXT: Stmt_reduction_exit
; PARTIAL-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; PARTIAL-NEXT: { Stmt_reduction_exit[i0] -> MemRef_val__phi[] };
; PARTIAL-NEXT: new: { Stmt_reduction_exit[i0] -> MemRef_A[-1 + i0] };
; PARTIAL-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
; PARTIAL-NEXT: { Stmt_reduction_exit[i0] -> MemRef_A[-1 + i0] };
; PARTIAL-NEXT: }