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