From fb70e11bbcbe57bb7a6295e2f3ae1a1a71af02d4 Mon Sep 17 00:00:00 2001 From: Arnold Schwaighofer Date: Wed, 29 Jan 2014 18:55:44 +0000 Subject: [PATCH] LoopVectorizer: Add a test case for unrolling of small loops that need a runtime check. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200408 91177308-0d34-0410-b5e6-96231b3b80d8 --- .../LoopVectorize/X86/unroll-small-loops.ll | 23 +++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/test/Transforms/LoopVectorize/X86/unroll-small-loops.ll b/test/Transforms/LoopVectorize/X86/unroll-small-loops.ll index ea107dc4dc5..1f0944d24d0 100644 --- a/test/Transforms/LoopVectorize/X86/unroll-small-loops.ll +++ b/test/Transforms/LoopVectorize/X86/unroll-small-loops.ll @@ -48,3 +48,26 @@ define i32 @bar(i32* nocapture %A, i32 %n) nounwind uwtable ssp { ._crit_edge: ; preds = %.lr.ph, %0 ret i32 undef } + +; Also unroll if we need a runtime check. +; CHECK-LABEL: runtime_chk +; CHECK: store <4 x float> +; CHECK: store <4 x float> +define void @runtime_chk(float* %A, float* %B, float %N) { +entry: + br label %for.body + +for.body: + %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] + %arrayidx = getelementptr inbounds float* %B, i64 %indvars.iv + %0 = load float* %arrayidx, align 4 + %mul = fmul float %0, %N + %arrayidx2 = getelementptr inbounds float* %A, i64 %indvars.iv + store float %mul, float* %arrayidx2, align 4 + %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 + %exitcond = icmp eq i64 %indvars.iv.next, 256 + br i1 %exitcond, label %for.end, label %for.body + +for.end: + ret void +}