forked from OSchip/llvm-project
78 lines
2.4 KiB
LLVM
78 lines
2.4 KiB
LLVM
; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-print-optree -disable-output < %s | FileCheck %s -match-full-lines
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;
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; Forward a the LoadInst %val into %bodyB. %val is executed multiple times,
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; we must get the last loaded values.
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;
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; for (int j = 0; j < n; j += 1) {
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; double val;
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; for (int i = 0; i < n; i += 1) {
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; bodyA:
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; val = B[j];
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; }
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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, 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 sle i32 %j, %n
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br i1 %j.cmp, label %bodyA, label %exit
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bodyA:
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%i = phi i32 [0, %for], [%i.inc, %bodyA]
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%B_idx = getelementptr inbounds double, double* %B, i32 %i
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%val = load double, double* %B_idx
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%i.inc = add nuw nsw i32 %i, 1
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%i.cmp = icmp slt i32 %i, %n
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br i1 %i.cmp, label %bodyA, 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 %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: After statements {
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; CHECK-NEXT: Stmt_bodyA
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; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
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; CHECK-NEXT: [n] -> { Stmt_bodyA[i0, i1] -> MemRef_B[i1] };
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; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
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; CHECK-NEXT: [n] -> { Stmt_bodyA[i0, i1] -> MemRef_val[] };
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; CHECK-NEXT: Instructions {
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; CHECK-NEXT: %val = load double, double* %B_idx, align 8
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; CHECK-NEXT: %i.cmp = icmp slt i32 %i, %n
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; CHECK-NEXT: }
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; CHECK-NEXT: 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[n] };
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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, double* %B_idx, align 8
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; CHECK-NEXT: store double %val, double* %A_idx, align 8
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; CHECK-NEXT: }
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; CHECK-NEXT: }
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