forked from OSchip/llvm-project
63 lines
2.3 KiB
LLVM
63 lines
2.3 KiB
LLVM
; RUN: opt %loadPolly -basicaa -polly-dependences -analyze < %s | FileCheck %s
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;
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; This loopnest contains a reduction which imposes the same dependences as the
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; accesses to the array A. We need to ensure we keep the dependences of A.
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;
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; CHECK: RAW dependences:
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; CHECK-NEXT: { Stmt_for_body[i0] -> Stmt_for_body[1 + i0] : 0 <= i0 <= 1022 }
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; CHECK-NEXT: WAR dependences:
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; CHECK-NEXT: { }
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; CHECK-NEXT: WAW dependences:
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; CHECK-NEXT: { Stmt_for_body[i0] -> Stmt_for_body[1 + i0] : 0 <= i0 <= 1022 }
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; CHECK-NEXT: Reduction dependences:
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; CHECK-NEXT: { Stmt_for_body[i0] -> Stmt_for_body[1 + i0] : 0 <= i0 <= 1022 }
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;
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;
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; void AandSum(int *restrict sum, int *restrict A) {
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; for (int i = 0; i < 1024; i++) {
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; A[i] = A[i] + A[i - 1];
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; A[i - 1] = A[i] + A[i - 2];
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; *sum += i;
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; }
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; }
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;
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-n32-S64"
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define void @AandSum(i32* noalias %sum, i32* noalias %A) {
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entry:
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
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%exitcond = icmp ne i32 %i.0, 1024
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br i1 %exitcond, label %for.body, label %for.end
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for.body: ; preds = %for.cond
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%arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.0
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%tmp = load i32, i32* %arrayidx, align 4
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%sub = add nsw i32 %i.0, -1
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%arrayidx1 = getelementptr inbounds i32, i32* %A, i32 %sub
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%tmp1 = load i32, i32* %arrayidx1, align 4
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%add = add nsw i32 %tmp, %tmp1
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%arrayidx2 = getelementptr inbounds i32, i32* %A, i32 %i.0
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store i32 %add, i32* %arrayidx2, align 4
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%sub4 = add nsw i32 %i.0, -2
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%arrayidx5 = getelementptr inbounds i32, i32* %A, i32 %sub4
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%tmp2 = load i32, i32* %arrayidx5, align 4
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%add6 = add nsw i32 %add, %tmp2
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%sub7 = add nsw i32 %i.0, -1
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%arrayidx8 = getelementptr inbounds i32, i32* %A, i32 %sub7
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store i32 %add6, i32* %arrayidx8, align 4
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%tmp3 = load i32, i32* %sum, align 4
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%add9 = add nsw i32 %tmp3, %i.0
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store i32 %add9, i32* %sum, align 4
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br label %for.inc
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for.inc: ; preds = %for.body
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%inc = add nsw i32 %i.0, 1
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br label %for.cond
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for.end: ; preds = %for.cond
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ret void
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}
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