forked from OSchip/llvm-project
68 lines
2.6 KiB
LLVM
68 lines
2.6 KiB
LLVM
; RUN: opt -S %loadPolly -polly-dependences -analyze < %s | FileCheck %s -check-prefix=VALUE
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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; for (int i = 0; i < N; i++) {
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; A.must.write.20: A[i] = 20;
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;
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; compute.i.square: if (i * i)
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; A.may.write.90: A[i] = 90;
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;
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; B.write.from.A: B[i] = A[i];
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; A.must.write.42: A[i] = 42;
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; }
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define void @f(i32* %A, i32* %B) {
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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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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
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%exitcond = icmp ne i64 %indvars.iv, 3000
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br i1 %exitcond, label %A.must.write.20, label %for.end
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A.must.write.20:
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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store i32 20, i32* %arrayidx, align 4
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br label %compute.i.square
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compute.i.square:
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%tmp = mul nsw i64 %indvars.iv, %indvars.iv
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%tmp2 = trunc i64 %tmp to i32
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%tobool = icmp eq i32 %tmp2, 0
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br i1 %tobool, label %B.write.from.A, label %A.may.write.90
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A.may.write.90:
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%arrayidx2 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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store i32 90, i32* %arrayidx2, align 4
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br label %B.write.from.A
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B.write.from.A:
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%arrayidx4 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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%tmp3 = load i32, i32* %arrayidx4, align 4
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%arrayidx6 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv
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store i32 %tmp3, i32* %arrayidx6, align 4
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br label %A.must.write.42
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; br label %for.inc
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A.must.write.42:
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%arrayidx5 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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store i32 42, i32* %arrayidx5, align 4
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br label %for.inc
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for.inc: ; preds = %if.end
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 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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; VALUE: RAW dependences:
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; VALUE-NEXT: { Stmt_A_must_write_20[i0] -> Stmt_B_write_from_A[i0] : 0 <= i0 <= 2999; Stmt_compute_i_square__TO__B_write_from_A[i0] -> Stmt_B_write_from_A[i0] : 0 <= i0 <= 2999 }
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; VALUE-NEXT: WAR dependences:
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; VALUE-NEXT: { Stmt_B_write_from_A[i0] -> Stmt_A_must_write_42[i0] : 0 <= i0 <= 2999 }
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; VALUE-NEXT: WAW dependences:
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; VALUE-NEXT: { Stmt_compute_i_square__TO__B_write_from_A[i0] -> Stmt_A_must_write_42[i0] : 0 <= i0 <= 2999; Stmt_A_must_write_20[i0] -> Stmt_A_must_write_42[i0] : 0 <= i0 <= 2999; Stmt_A_must_write_20[i0] -> Stmt_compute_i_square__TO__B_write_from_A[i0] : 0 <= i0 <= 2999 }
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; VALUE-NEXT: Reduction dependences:
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; VALUE-NEXT: { }
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; VALUE-NEXT: Transitive closure of reduction dependences:
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; VALUE-NEXT: { }
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