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6e6264c142
This will make it easier to switch the default of Polly's invariant load hoisting strategy and also makes it very clear that these test cases indeed require invariant code hoisting to work. llvm-svn: 278667
56 lines
1.7 KiB
LLVM
56 lines
1.7 KiB
LLVM
; RUN: opt %loadPolly -polly-codegen -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, i32* %B, i64 0
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; CHECK: %polly.access.B.load = load i32, i32* %polly.access.B
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; CHECK: store i32 %polly.access.B.load, i32* %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, i32* %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(i32* %A, i32* %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, i32* %B, align 4
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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%tmp1 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %tmp1, %tmp
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store i32 %add, i32* %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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