derek.holloway
7502bf64a4
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60 lines
1.5 KiB
LLVM
60 lines
1.5 KiB
LLVM
; RUN: opt %loadNPMPolly '-passes=polly-custom<optree>' -polly-print-optree -disable-output < %s | FileCheck %s -match-full-lines
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;
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; Rematerialize a load.
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;
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; for (int j = 0; j < n; j += 1) {
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; bodyA:
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; double val = B[j];
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;
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; bodyB:
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; A[j] = val;
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; }
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;
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define void @func(i32 %n, ptr noalias nonnull %A, ptr noalias nonnull %B) {
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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 %bodyA, label %exit
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bodyA:
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%B_idx = getelementptr inbounds double, ptr %B, i32 %j
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%val = load double, ptr %B_idx
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br label %bodyB
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bodyB:
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%A_idx = getelementptr inbounds double, ptr %A, i32 %j
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store double %val, ptr %A_idx
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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: Known loads forwarded: 1
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; CHECK: Operand trees forwarded: 1
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; CHECK: Statements with forwarded operand trees: 1
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; CHECK: }
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; CHECK: Stmt_bodyB
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; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
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; CHECK-NEXT: ;
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; CHECK-NEXT: new: [n] -> { Stmt_bodyB[i0] -> MemRef_B[i0] };
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; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
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; CHECK-NEXT: [n] -> { Stmt_bodyB[i0] -> MemRef_A[i0] };
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; CHECK-NEXT: Instructions {
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; CHECK-NEXT: %val = load double, ptr %B_idx, align 8
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; CHECK-NEXT: store double %val, ptr %A_idx, align 8
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; CHECK-NEXT: }
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