2015-10-06 23:36:44 +08:00
|
|
|
; RUN: opt %loadPolly -basicaa -polly-dependences -analyze < %s | FileCheck %s
|
2014-07-15 08:00:35 +08:00
|
|
|
;
|
|
|
|
; This loopnest contains a reduction which imposes the same dependences as the
|
|
|
|
; accesses to the array A. We need to ensure we keep the dependences of A.
|
|
|
|
;
|
2016-01-15 08:48:42 +08:00
|
|
|
; CHECK: RAW dependences:
|
2016-01-15 23:54:45 +08:00
|
|
|
; CHECK-NEXT: { Stmt_for_body[i0] -> Stmt_for_body[1 + i0] : 0 <= i0 <= 1022 }
|
2016-01-15 08:48:42 +08:00
|
|
|
; CHECK-NEXT: WAR dependences:
|
|
|
|
; CHECK-NEXT: { }
|
|
|
|
; CHECK-NEXT: WAW dependences:
|
2016-01-15 23:54:45 +08:00
|
|
|
; CHECK-NEXT: { Stmt_for_body[i0] -> Stmt_for_body[1 + i0] : 0 <= i0 <= 1022 }
|
2016-01-15 08:48:42 +08:00
|
|
|
; CHECK-NEXT: Reduction dependences:
|
2016-01-15 23:54:45 +08:00
|
|
|
; CHECK-NEXT: { Stmt_for_body[i0] -> Stmt_for_body[1 + i0] : 0 <= i0 <= 1022 }
|
2014-07-15 08:00:35 +08:00
|
|
|
;
|
|
|
|
;
|
|
|
|
; void AandSum(int *restrict sum, int *restrict A) {
|
|
|
|
; for (int i = 0; i < 1024; i++) {
|
|
|
|
; A[i] = A[i] + A[i - 1];
|
|
|
|
; A[i - 1] = A[i] + A[i - 2];
|
|
|
|
; *sum += i;
|
|
|
|
; }
|
|
|
|
; }
|
|
|
|
;
|
|
|
|
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-n32-S64"
|
|
|
|
|
|
|
|
define void @AandSum(i32* noalias %sum, i32* noalias %A) {
|
|
|
|
entry:
|
|
|
|
br label %for.cond
|
|
|
|
|
|
|
|
for.cond: ; preds = %for.inc, %entry
|
|
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
|
|
|
|
%exitcond = icmp ne i32 %i.0, 1024
|
|
|
|
br i1 %exitcond, label %for.body, label %for.end
|
|
|
|
|
|
|
|
for.body: ; preds = %for.cond
|
2015-02-28 03:20:19 +08:00
|
|
|
%arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.0
|
2015-02-28 05:22:50 +08:00
|
|
|
%tmp = load i32, i32* %arrayidx, align 4
|
2014-07-15 08:00:35 +08:00
|
|
|
%sub = add nsw i32 %i.0, -1
|
2015-02-28 03:20:19 +08:00
|
|
|
%arrayidx1 = getelementptr inbounds i32, i32* %A, i32 %sub
|
2015-02-28 05:22:50 +08:00
|
|
|
%tmp1 = load i32, i32* %arrayidx1, align 4
|
2014-07-15 08:00:35 +08:00
|
|
|
%add = add nsw i32 %tmp, %tmp1
|
2015-02-28 03:20:19 +08:00
|
|
|
%arrayidx2 = getelementptr inbounds i32, i32* %A, i32 %i.0
|
2014-07-15 08:00:35 +08:00
|
|
|
store i32 %add, i32* %arrayidx2, align 4
|
|
|
|
%sub4 = add nsw i32 %i.0, -2
|
2015-02-28 03:20:19 +08:00
|
|
|
%arrayidx5 = getelementptr inbounds i32, i32* %A, i32 %sub4
|
2015-02-28 05:22:50 +08:00
|
|
|
%tmp2 = load i32, i32* %arrayidx5, align 4
|
2014-07-15 08:00:35 +08:00
|
|
|
%add6 = add nsw i32 %add, %tmp2
|
|
|
|
%sub7 = add nsw i32 %i.0, -1
|
2015-02-28 03:20:19 +08:00
|
|
|
%arrayidx8 = getelementptr inbounds i32, i32* %A, i32 %sub7
|
2014-07-15 08:00:35 +08:00
|
|
|
store i32 %add6, i32* %arrayidx8, align 4
|
2015-02-28 05:22:50 +08:00
|
|
|
%tmp3 = load i32, i32* %sum, align 4
|
2014-07-15 08:00:35 +08:00
|
|
|
%add9 = add nsw i32 %tmp3, %i.0
|
|
|
|
store i32 %add9, i32* %sum, align 4
|
|
|
|
br label %for.inc
|
|
|
|
|
|
|
|
for.inc: ; preds = %for.body
|
|
|
|
%inc = add nsw i32 %i.0, 1
|
|
|
|
br label %for.cond
|
|
|
|
|
|
|
|
for.end: ; preds = %for.cond
|
|
|
|
ret void
|
|
|
|
}
|