derek.holloway
7502bf64a4
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56 lines
1.8 KiB
LLVM
56 lines
1.8 KiB
LLVM
; RUN: opt %loadNPMPolly '-passes=polly<no-default-opts>' -polly-invariant-load-hoisting=true -S < %s | FileCheck %s
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;
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; int f(int *A, int *B) {
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; // Possible aliasing between A and B but if not then *B would be
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; // invariant. We assume this and hoist *B but need to use a merged
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; // version in the return.
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; int i = 0;
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; int x = 0;
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;
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; do {
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; x = *B;
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; A[i] += x;
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; } while (i++ < 100);
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;
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; return x;
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; }
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;
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; CHECK: polly.preload.begin:
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; CHECK: %polly.access.B = getelementptr i32, ptr %B, i64 0
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; CHECK: %polly.access.B.load = load i32, ptr %polly.access.B
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; CHECK: store i32 %polly.access.B.load, ptr %tmp.preload.s2a
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;
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; CHECK: polly.merge_new_and_old:
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; CHECK: %tmp.merge = phi i32 [ %tmp.final_reload, %polly.exiting ], [ %tmp, %do.cond ]
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; CHECK: br label %do.end
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;
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; CHECK: do.end:
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; CHECK: ret i32 %tmp.merge
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;
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; CHECK: polly.loop_exit:
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; CHECK: %tmp.final_reload = load i32, ptr %tmp.preload.s2a
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;
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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define i32 @f(ptr %A, ptr %B) {
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entry:
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br label %do.body
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do.body: ; preds = %do.cond, %entry
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%indvars.iv = phi i64 [ %indvars.iv.next, %do.cond ], [ 0, %entry ]
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%tmp = load i32, ptr %B, align 4
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%arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
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%tmp1 = load i32, ptr %arrayidx, align 4
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%add = add nsw i32 %tmp1, %tmp
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store i32 %add, ptr %arrayidx, align 4
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br label %do.cond
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do.cond: ; preds = %do.body
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp ne i64 %indvars.iv.next, 101
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br i1 %exitcond, label %do.body, label %do.end
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do.end: ; preds = %do.cond
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ret i32 %tmp
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}
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