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SLPVectorizer: add a test to check if the minimum region size works.

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This is an addition to rL248917.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@248923 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Erik Eckstein 2015-09-30 17:28:19 +00:00
parent d84fffe1de
commit 0d973b565c
1 changed files with 28 additions and 1 deletions
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29
test/Transforms/SLPVectorizer/X86/schedule_budget.ll
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@ -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
}