forked from OSchip/llvm-project
61 lines
1.3 KiB
LLVM
61 lines
1.3 KiB
LLVM
; RUN: opt %loadPolly -polly-print-optree -disable-output < %s | FileCheck %s -match-full-lines
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;
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; Rematerialize a load in the presence of a non-store WRITE access.
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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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; bodyC:
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; memset(A, 0, 16);
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; memset(B, 0, 16);
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; }
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;
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declare void @llvm.memset.p0f64.i64(double* nocapture, i8, i64, i32, i1)
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define void @func(i32 %n, double* noalias nonnull %A, double* 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, double* %B, i32 %j
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%val = load double, double* %B_idx
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br label %bodyB
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bodyB:
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%A_idx = getelementptr inbounds double, double* %A, i32 %j
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store double %val, double* %A_idx
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br label %bodyC
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bodyC:
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call void @llvm.memset.p0f64.i64(double* %A, i8 0, i64 16, i32 1, i1 false)
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call void @llvm.memset.p0f64.i64(double* %B, i8 0, i64 16, i32 1, i1 false)
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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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