dependence_distance_constant.ll
1.94 KB
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; RUN: opt %loadPolly -polly-ast -polly-ast-detect-parallel -analyze < %s | FileCheck %s
; RUN: opt %loadPolly -polyhedral-info -polly-check-parallel -analyze < %s | FileCheck %s -check-prefix=PINFO
;
; void f(int *A, int N) {
; CHECK: #pragma minimal dependence distance: 1
; PINFO: for.cond: Loop is not parallel.
; for (int j = 0; j < N; j++)
; CHECK: #pragma minimal dependence distance: 8
; PINFO-NEXT: for.cond1: Loop is not parallel.
; for (int i = 0; i < N; i++)
; A[i + 8] = A[i] + 1;
; }
;
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-n32-S64"
define void @f(i32* %A, i32 %N) {
entry:
br label %for.cond
for.cond: ; preds = %for.inc6, %entry
%j.0 = phi i32 [ 0, %entry ], [ %inc7, %for.inc6 ]
%cmp = icmp slt i32 %j.0, %N
br i1 %cmp, label %for.body, label %for.end8
for.body: ; preds = %for.cond
br label %for.cond1
for.cond1: ; preds = %for.inc, %for.body
%i.0 = phi i32 [ 0, %for.body ], [ %inc, %for.inc ]
%exitcond = icmp ne i32 %i.0, %N
br i1 %exitcond, label %for.body3, label %for.end
for.body3: ; preds = %for.cond1
%arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.0
%tmp = load i32, i32* %arrayidx, align 4
%add = add nsw i32 %tmp, 1
%add4 = add nsw i32 %i.0, 8
%arrayidx5 = getelementptr inbounds i32, i32* %A, i32 %add4
store i32 %add, i32* %arrayidx5, align 4
br label %for.inc
for.inc: ; preds = %for.body3
%inc = add nsw i32 %i.0, 1
br label %for.cond1
for.end: ; preds = %for.cond1
br label %for.inc6
for.inc6: ; preds = %for.end
%inc7 = add nsw i32 %j.0, 1
br label %for.cond
for.end8: ; preds = %for.cond
ret void
}