X86TTI: i16/i32 vector div with a constant (splat) divisor are reasonably cheap now.

Turn vectorization back on.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207320 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 92 insertions, 0 deletions

diff --git a/test/Analysis/CostModel/X86/vdiv-cost.ll b/test/Analysis/CostModel/X86/vdiv-cost.ll
new file mode 100644
index 0000000000..4ba1ef07ad
--- /dev/null
+++ b/test/Analysis/CostModel/X86/vdiv-cost.ll
@@ -0,0 +1,92 @@
+; RUN: opt < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 -mattr=+sse2,-sse4.1 -cost-model -analyze | FileCheck %s -check-prefix=CHECK -check-prefix=SSE2
+; RUN: opt < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=core-avx2 -cost-model -analyze | FileCheck %s -check-prefix=CHECK -check-prefix=AVX2
+
+define <4 x i32> @test1(<4 x i32> %a) {
+  %div = udiv <4 x i32> %a, <i32 7, i32 7, i32 7, i32 7>
+  ret <4 x i32> %div
+
+; CHECK: 'Cost Model Analysis' for function 'test1':
+; SSE2: Found an estimated cost of 15 for instruction:   %div
+; AVX2: Found an estimated cost of 15 for instruction:   %div
+}
+
+define <8 x i32> @test2(<8 x i32> %a) {
+  %div = udiv <8 x i32> %a, <i32 7, i32 7, i32 7, i32 7,i32 7, i32 7, i32 7, i32 7>
+  ret <8 x i32> %div
+
+; CHECK: 'Cost Model Analysis' for function 'test2':
+; SSE2: Found an estimated cost of 30 for instruction:   %div
+; AVX2: Found an estimated cost of 15 for instruction:   %div
+}
+
+define <8 x i16> @test3(<8 x i16> %a) {
+  %div = udiv <8 x i16> %a, <i16 7, i16 7, i16 7, i16 7, i16 7, i16 7, i16 7, i16 7>
+  ret <8 x i16> %div
+
+; CHECK: 'Cost Model Analysis' for function 'test3':
+; SSE2: Found an estimated cost of 6 for instruction:   %div
+; AVX2: Found an estimated cost of 6 for instruction:   %div
+}
+
+define <16 x i16> @test4(<16 x i16> %a) {
+  %div = udiv <16 x i16> %a, <i16 7, i16 7, i16 7, i16 7,i16 7, i16 7, i16 7, i16 7, i16 7, i16 7, i16 7, i16 7,i16 7, i16 7, i16 7, i16 7>
+  ret <16 x i16> %div
+
+; CHECK: 'Cost Model Analysis' for function 'test4':
+; SSE2: Found an estimated cost of 12 for instruction:   %div
+; AVX2: Found an estimated cost of 6 for instruction:   %div
+}
+
+define <8 x i16> @test5(<8 x i16> %a) {
+  %div = sdiv <8 x i16> %a, <i16 7, i16 7, i16 7, i16 7, i16 7, i16 7, i16 7, i16 7>
+  ret <8 x i16> %div
+
+; CHECK: 'Cost Model Analysis' for function 'test5':
+; SSE2: Found an estimated cost of 6 for instruction:   %div
+; AVX2: Found an estimated cost of 6 for instruction:   %div
+}
+
+define <16 x i16> @test6(<16 x i16> %a) {
+  %div = sdiv <16 x i16> %a, <i16 7, i16 7, i16 7, i16 7,i16 7, i16 7, i16 7, i16 7, i16 7, i16 7, i16 7, i16 7,i16 7, i16 7, i16 7, i16 7>
+  ret <16 x i16> %div
+
+; CHECK: 'Cost Model Analysis' for function 'test6':
+; SSE2: Found an estimated cost of 12 for instruction:   %div
+; AVX2: Found an estimated cost of 6 for instruction:   %div
+}
+
+define <16 x i8> @test7(<16 x i8> %a) {
+  %div = sdiv <16 x i8> %a, <i8 7, i8 7, i8 7, i8 7,i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7,i8 7, i8 7, i8 7, i8 7>
+  ret <16 x i8> %div
+
+; CHECK: 'Cost Model Analysis' for function 'test7':
+; SSE2: Found an estimated cost of 320 for instruction:   %div
+; AVX2: Found an estimated cost of 320 for instruction:   %div
+}
+
+define <4 x i32> @test8(<4 x i32> %a) {
+  %div = sdiv <4 x i32> %a, <i32 7, i32 7, i32 7, i32 7>
+  ret <4 x i32> %div
+
+; CHECK: 'Cost Model Analysis' for function 'test8':
+; SSE2: Found an estimated cost of 15 for instruction:   %div
+; AVX2: Found an estimated cost of 15 for instruction:   %div
+}
+
+define <8 x i32> @test9(<8 x i32> %a) {
+  %div = sdiv <8 x i32> %a, <i32 7, i32 7, i32 7, i32 7,i32 7, i32 7, i32 7, i32 7>
+  ret <8 x i32> %div
+
+; CHECK: 'Cost Model Analysis' for function 'test9':
+; SSE2: Found an estimated cost of 30 for instruction:   %div
+; AVX2: Found an estimated cost of 15 for instruction:   %div
+}
+
+define <8 x i32> @test10(<8 x i32> %a) {
+  %div = sdiv <8 x i32> %a, <i32 8, i32 7, i32 7, i32 7,i32 7, i32 7, i32 7, i32 7>
+  ret <8 x i32> %div
+
+; CHECK: 'Cost Model Analysis' for function 'test10':
+; SSE2: Found an estimated cost of 160 for instruction:   %div
+; AVX2: Found an estimated cost of 160 for instruction:   %div
+}