[llvm] r248923 - SLPVectorizer: add a test to check if the minimum region size works.

[Michael Zolotukhin via llvm-commits]

Thanks!

> On Sep 30, 2015, at 10:28 AM, Erik Eckstein via llvm-commits <llvm-commits at lists.llvm.org> wrote:
> 
> Author: eeckstein
> Date: Wed Sep 30 12:28:19 2015
> New Revision: 248923
> 
> URL: http://llvm.org/viewvc/llvm-project?rev=248923&view=rev
> Log:
> SLPVectorizer: add a test to check if the minimum region size works.
> 
> This is an addition to rL248917.
> 
> 
> Modified:
>    llvm/trunk/test/Transforms/SLPVectorizer/X86/schedule_budget.ll
> 
> Modified: llvm/trunk/test/Transforms/SLPVectorizer/X86/schedule_budget.ll
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/SLPVectorizer/X86/schedule_budget.ll?rev=248923&r1=248922&r2=248923&view=diff
> ==============================================================================
> --- llvm/trunk/test/Transforms/SLPVectorizer/X86/schedule_budget.ll (original)
> +++ llvm/trunk/test/Transforms/SLPVectorizer/X86/schedule_budget.ll Wed Sep 30 12:28:19 2015
> @@ -14,8 +14,15 @@ declare void @unknown()
> ; CHECK: load float
> ; CHECK: load float
> ; CHECK: call void @unknown
> -define void @test(float * %a, float * %b) {
> +; CHECK: store float
> +; CHECK: store float
> +; CHECK: store float
> +; CHECK: store float
> +; CHECK: load <4 x float>
> +; CHECK: store <4 x float>
> +define void @test(float * %a, float * %b, float * %c, float * %d) {
> entry:
> +  ; Don't vectorize these loads.
>   %l0 = load float, float* %a
>   %a1 = getelementptr inbounds float, float* %a, i64 1
>   %l1 = load float, float* %a1
> @@ -54,6 +61,7 @@ entry:
>   call void @unknown()
>   call void @unknown()
> 
> +  ; Don't vectorize these stores because their operands are too far away.
>   store float %l0, float* %b
>   %b1 = getelementptr inbounds float, float* %b, i64 1
>   store float %l1, float* %b1
> @@ -61,6 +69,25 @@ entry:
>   store float %l2, float* %b2
>   %b3 = getelementptr inbounds float, float* %b, i64 3
>   store float %l3, float* %b3
> +
> +  ; But still vectorize the following instructions, because even if the budget
> +  ; is exceeded there is a minimum region size.
> +  %l4 = load float, float* %c
> +  %c1 = getelementptr inbounds float, float* %c, i64 1
> +  %l5 = load float, float* %c1
> +  %c2 = getelementptr inbounds float, float* %c, i64 2
> +  %l6 = load float, float* %c2
> +  %c3 = getelementptr inbounds float, float* %c, i64 3
> +  %l7 = load float, float* %c3
> +
> +  store float %l4, float* %d
> +  %d1 = getelementptr inbounds float, float* %d, i64 1
> +  store float %l5, float* %d1
> +  %d2 = getelementptr inbounds float, float* %d, i64 2
> +  store float %l6, float* %d2
> +  %d3 = getelementptr inbounds float, float* %d, i64 3
> +  store float %l7, float* %d3
> +
>   ret void
> }
> 
> 
> 
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