forked from OSchip/llvm-project
62 lines
1.4 KiB
LLVM
62 lines
1.4 KiB
LLVM
; RUN: opt %loadPolly -polly-import-jscop -polly-import-jscop-postfix=transformed -polly-simplify -analyze < %s | FileCheck -match-full-lines %s
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;
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; Remove identical writes
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; (two stores in the same statement that write the same value to the same
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; destination)
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;
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; for (int j = 0; j < n; j += 1) {
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; body:
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; val = 21.0 + 21.0;
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; A[1] = val;
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; A[1] = val;
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; A[1] = val;
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;
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; user:
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; A[0] = A[1];
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; }
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;
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define void @overwritten_3phi(i32 %n, double* noalias nonnull %A) {
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entry:
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br label %for
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for:
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%j = phi i32 [0, %entry], [%j.inc, %inc]
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%j.cmp = icmp slt i32 %j, %n
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br i1 %j.cmp, label %body, label %exit
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body:
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%val = fadd double 21.0, 21.0
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br label %user
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user:
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%phi1 = phi double [%val, %body]
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%phi2 = phi double [%val, %body]
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%phi3 = phi double [%val, %body]
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%add1 = fadd double %phi1, %phi2
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%add2 = fadd double %add1, %phi3
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store double %add2, double* %A
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br label %inc
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inc:
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%j.inc = add nuw nsw i32 %j, 1
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br label %for
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exit:
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br label %return
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return:
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ret void
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}
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; CHECK: Statistics {
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; CHECK: Overwrites removed: 2
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; CHECK: }
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; CHECK: Stmt_body
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; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
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; CHECK-NEXT: [n] -> { Stmt_body[i0] -> MemRef_phi3__phi[] };
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; CHECK-NEXT: new: [n] -> { Stmt_body[i0] -> MemRef_A[1] };
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; CHECK-NEXT: Stmt_user
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