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X86 cost model: Vectorizing integer division is a bad idea

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184872 91177308-0d34-0410-b5e6-96231b3b80d8
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Arnold Schwaighofer
2013-06-25 19:14:09 +00:00
parent a1fe2948ed
commit 34eb2406b4
2 changed files with 57 additions and 0 deletions
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32
test/Analysis/CostModel/X86/div.ll Normal file
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; RUN: opt -mtriple=x86_64-apple-darwin -mcpu=core2 -cost-model -analyze < %s | FileCheck --check-prefix=SSE2 %s
; RUN: opt -mtriple=x86_64-apple-darwin -mcpu=core-avx2 -cost-model -analyze < %s | FileCheck --check-prefix=AVX2 %s
define void @div_sse() {
; SSE2: div_sse
; SSE2: cost of 320 {{.*}} sdiv
%a0 = sdiv <16 x i8> undef, undef
; SSE2: cost of 160 {{.*}} sdiv
%a1 = sdiv <8 x i16> undef, undef
; SSE2: cost of 80 {{.*}} sdiv
%a2 = sdiv <4 x i32> undef, undef
; SSE2: cost of 40 {{.*}} sdiv
%a3 = sdiv <2 x i32> undef, undef
ret void
}
; SSE2: div_avx
define void @div_avx() {
; AVX2: div_avx
; AVX2: cost of 640 {{.*}} sdiv
%a0 = sdiv <32 x i8> undef, undef
; AVX2: cost of 320 {{.*}} sdiv
%a1 = sdiv <16 x i16> undef, undef
; AVX2: cost of 160 {{.*}} sdiv
%a2 = sdiv <8 x i32> undef, undef
; AVX2: cost of 80 {{.*}} sdiv
%a3 = sdiv <4 x i32> undef, undef
ret void
}