ed21a1fc7e
If a region does not have more than one loop, we do not identify it as a Scop in ScopDetection. The main optimizations Polly is currently performing (tiling, preparation for outer-loop vectorization and loop fusion) are unlikely to have a positive impact on individual loops. In some cases, Polly's run-time alias checks or conditional hoisting may still have a positive impact, but those are mostly enabling transformations which LLVM already performs for individual loops. As we do not focus on individual loops, we leave them untouched to not introduce compile time regressions and execution time noise. This results in good compile time reduction (oourafft: -73.99%, smg2000: -56.25%). Contributed-by: Pratik Bhatu <cs12b1010@iith.ac.in> Reviewers: grosser Differential Revision: http://reviews.llvm.org/D12268 llvm-svn: 246161
40 lines
1.6 KiB
LLVM
40 lines
1.6 KiB
LLVM
; RUN: opt %loadPolly -polly-vectorizer=polly -polly-codegen \
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; RUN: -polly-detect-unprofitable < %s -S | FileCheck %s
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; #pragma known-parallel
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; for (int c0 = 0; c0 <= min(15, N - 1); c0 += 1)
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; Stmt_if_then(c0);
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; CHECK: polly.stmt.if.then: ; preds = %polly.loop_header
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; CHECK: %p_conv = sitofp i64 %polly.indvar to float
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; CHECK: %scevgep = getelementptr float, float* %A, i64 %polly.indvar
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; CHECK: %_p_scalar_ = load float, float* %scevgep, align 4, !alias.scope !0, !noalias !2, !llvm.mem.parallel_loop_access !3
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; CHECK: %p_add = fadd float %p_conv, %_p_scalar_
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; CHECK: store float %p_add, float* %scevgep, align 4, !alias.scope !0, !noalias !2, !llvm.mem.parallel_loop_access !3
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define void @foo(float* %A, i64 %N) #0 {
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entry:
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br label %for.body
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for.body: ; preds = %entry, %for.inc
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%i.02 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
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%cmp1 = icmp slt i64 %i.02, %N
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%conv = sitofp i64 %i.02 to float
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%arrayidx = getelementptr inbounds float, float* %A, i64 %i.02
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%0 = load float, float* %arrayidx, align 4
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%add = fadd float %conv, %0
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store float %add, float* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%inc = add nuw nsw i64 %i.02, 1
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%exitcond = icmp ne i64 %inc, 16
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br i1 %exitcond, label %for.body, label %for.end
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for.end: ; preds = %for.inc
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ret void
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}
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