From dc7001afb2d58c56d9c6c6f483fac12a59031f91 Mon Sep 17 00:00:00 2001 From: Wei Mi Date: Tue, 2 Aug 2016 20:27:49 +0000 Subject: [LoopVectorize] Change comment for isOutOfScope in collectLoopUniforms, NFC Update comment for isOutOfScope and add a testcase for uniform value being used out of scope. Differential Revision: https://reviews.llvm.org/D23073 llvm-svn: 277515 --- .../Transforms/LoopVectorize/X86/uniform-phi.ll | 27 ++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'llvm/test/Transforms/LoopVectorize') diff --git a/llvm/test/Transforms/LoopVectorize/X86/uniform-phi.ll b/llvm/test/Transforms/LoopVectorize/X86/uniform-phi.ll index 1759cb81976..881f29a94cb 100644 --- a/llvm/test/Transforms/LoopVectorize/X86/uniform-phi.ll +++ b/llvm/test/Transforms/LoopVectorize/X86/uniform-phi.ll @@ -48,3 +48,30 @@ for.body: for.end: ret void } + +; CHECK-LABEL: goo +; Check %indvars.iv and %indvars.iv.next are uniform instructions even if they are used outside of loop. +; CHECK-DAG: LV: Found uniform instruction: %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] +; CHECK-DAG: LV: Found uniform instruction: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 +; CHECK-DAG: LV: Found uniform instruction: %exitcond = icmp eq i64 %indvars.iv, 1599 + +define i64 @goo(float* noalias nocapture %a, float* noalias nocapture readonly %b) #0 { +entry: + br label %for.body + +for.body: ; preds = %for.body, %entry + %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] + %arrayidx = getelementptr inbounds float, float* %b, i64 %indvars.iv + %tmp0 = load float, float* %arrayidx, align 4 + %add = fadd float %tmp0, 1.000000e+00 + %arrayidx5 = getelementptr inbounds float, float* %a, i64 %indvars.iv + store float %add, float* %arrayidx5, align 4 + %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 + %exitcond = icmp eq i64 %indvars.iv, 1599 + br i1 %exitcond, label %for.end, label %for.body + +for.end: ; preds = %for.body + %retval = add i64 %indvars.iv, %indvars.iv.next + ret i64 %retval +} + -- cgit v1.2.3