forked from OSchip/llvm-project
73 lines
2.5 KiB
LLVM
73 lines
2.5 KiB
LLVM
; RUN: opt %loadPolly -polly-mse -analyze < %s | FileCheck %s
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; RUN: opt %loadPolly -polly-mse -pass-remarks-analysis="polly-mse" -analyze < %s 2>&1| FileCheck %s --check-prefix=MSE
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;
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; Verify that Polly detects problems and does not expand the array
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;
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; Original source code :
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;
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; #define Ni 2000
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; #define Nj 3000
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;
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; double mse(double A[Ni], double B[Nj]) {
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; int i;
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; double tmp = 6;
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; for (i = 0; i < Ni; i++) {
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; for (int j = 2; j<Nj; j++) {
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; B[j-1] = j;
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; }
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; A[i] = B[i];
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; }
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; return tmp;
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; }
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;
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; Check that the pass detects the problem of read from original array after expansion.
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;
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; MSE: The expansion of MemRef_B would lead to a read from the original array.
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;
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; CHECK-NOT: double MemRef_B2_expanded[2000][3000]; // Element size 8
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;
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; Check that the memory accesses are not modified
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;
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; CHECK-NOT: new: { Stmt_for_body3[i0, i1] -> MemRef_B_Stmt_for_body3_expanded[i0, i1] };
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; CHECK-NOT: new: { Stmt_for_end[i0] -> MemRef_B_Stmt_for_body3_expanded
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;
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define double @mse(double* %A, double* %B) {
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entry:
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br label %entry.split
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entry.split: ; preds = %entry
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br label %for.body
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for.body: ; preds = %entry.split, %for.end
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%indvars.iv4 = phi i64 [ 0, %entry.split ], [ %indvars.iv.next5, %for.end ]
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br label %for.body3
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for.body3: ; preds = %for.body, %for.body3
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%indvars.iv = phi i64 [ 2, %for.body ], [ %indvars.iv.next, %for.body3 ]
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%0 = trunc i64 %indvars.iv to i32
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%conv = sitofp i32 %0 to double
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%1 = add nsw i64 %indvars.iv, -1
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%arrayidx = getelementptr inbounds double, double* %B, i64 %1
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store double %conv, double* %arrayidx, align 8
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp ne i64 %indvars.iv.next, 3000
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br i1 %exitcond, label %for.body3, label %for.end
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for.end: ; preds = %for.body3
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%arrayidx5 = getelementptr inbounds double, double* %B, i64 %indvars.iv4
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%2 = bitcast double* %arrayidx5 to i64*
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%3 = load i64, i64* %2, align 8
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%arrayidx7 = getelementptr inbounds double, double* %A, i64 %indvars.iv4
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%4 = bitcast double* %arrayidx7 to i64*
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store i64 %3, i64* %4, align 8
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%indvars.iv.next5 = add nuw nsw i64 %indvars.iv4, 1
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%exitcond6 = icmp ne i64 %indvars.iv.next5, 2000
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br i1 %exitcond6, label %for.body, label %for.end10
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for.end10: ; preds = %for.end
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ret double 6.000000e+00
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}
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