forked from OSchip/llvm-project
67 lines
2.1 KiB
LLVM
67 lines
2.1 KiB
LLVM
; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s
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;
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; CHECK-NOT: Reduction like: 1
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;
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; Check that we do not mark these accesses as reduction like.
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; We do this for the case the loads are modelt with the same LLVM-IR value and
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; for the case there are different LLVM-IR values.
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;
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; void f(int *A) {
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; for (int i = 0; i < 1024; i++)
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; A[i] = A[i] + A[i];
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; }
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;
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-n32-S64"
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define void @f_one_load_case(i32* %A) {
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entry:
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
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%exitcond = icmp ne i32 %i.0, 1024
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br i1 %exitcond, label %for.body, label %for.end
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for.body: ; preds = %for.cond
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%arrayidx = getelementptr inbounds i32* %A, i32 %i.0
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%tmp = load i32* %arrayidx, align 4
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%add = add nsw i32 %tmp, %tmp
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%arrayidx2 = getelementptr inbounds i32* %A, i32 %i.0
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store i32 %add, i32* %arrayidx2, align 4
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br label %for.inc
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for.inc: ; preds = %for.body
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%inc = add nsw i32 %i.0, 1
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br label %for.cond
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for.end: ; preds = %for.cond
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ret void
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}
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define void @f_two_loads_case(i32* %A) {
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entry:
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
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%exitcond = icmp ne i32 %i.0, 1024
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br i1 %exitcond, label %for.body, label %for.end
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for.body: ; preds = %for.cond
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%arrayidx = getelementptr inbounds i32* %A, i32 %i.0
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%tmp = load i32* %arrayidx, align 4
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%arrayidxCopy = getelementptr inbounds i32* %A, i32 %i.0
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%tmpCopy = load i32* %arrayidxCopy, align 4
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%add = add nsw i32 %tmp, %tmpCopy
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%arrayidx2 = getelementptr inbounds i32* %A, i32 %i.0
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store i32 %add, i32* %arrayidx2, align 4
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br label %for.inc
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for.inc: ; preds = %for.body
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%inc = add nsw i32 %i.0, 1
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br label %for.cond
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for.end: ; preds = %for.cond
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ret void
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}
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