[llvm] r249981 - [X86] Added ASHR cost model tests
Simon Pilgrim via llvm-commits
llvm-commits at lists.llvm.org
Sun Oct 11 10:08:05 PDT 2015
Author: rksimon
Date: Sun Oct 11 12:08:05 2015
New Revision: 249981
URL: http://llvm.org/viewvc/llvm-project?rev=249981&view=rev
Log:
[X86] Added ASHR cost model tests
There are several dodgy costings due to AVX1 legalizing 256-bit integer vectors that need fixing.
As discussed in D8690.
Added:
llvm/trunk/test/Analysis/CostModel/X86/vshift-ashr-cost.ll
Added: llvm/trunk/test/Analysis/CostModel/X86/vshift-ashr-cost.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Analysis/CostModel/X86/vshift-ashr-cost.ll?rev=249981&view=auto
==============================================================================
--- llvm/trunk/test/Analysis/CostModel/X86/vshift-ashr-cost.ll (added)
+++ llvm/trunk/test/Analysis/CostModel/X86/vshift-ashr-cost.ll Sun Oct 11 12:08:05 2015
@@ -0,0 +1,392 @@
+; 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=corei7 -cost-model -analyze | FileCheck %s -check-prefix=CHECK -check-prefix=SSE41
+; RUN: opt < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7-avx -cost-model -analyze | FileCheck %s -check-prefix=CHECK -check-prefix=AVX
+; RUN: opt < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=core-avx2 -cost-model -analyze | FileCheck %s -check-prefix=CHECK -check-prefix=AVX2
+; RUN: opt < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=bdver2 -cost-model -analyze | FileCheck %s -check-prefix=CHECK -check-prefix=XOP -check-prefix=XOPAVX
+; RUN: opt < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=bdver4 -cost-model -analyze | FileCheck %s -check-prefix=CHECK -check-prefix=XOP -check-prefix=XOPAVX2
+
+; Verify the cost of vector arithmetic shift right instructions.
+
+;
+; Variable Shifts
+;
+
+define <2 x i64> @var_shift_v2i64(<2 x i64> %a, <2 x i64> %b) {
+; CHECK: 'Cost Model Analysis' for function 'var_shift_v2i64':
+; SSE2: Found an estimated cost of 12 for instruction: %shift
+; SSE41: Found an estimated cost of 12 for instruction: %shift
+; AVX: Found an estimated cost of 12 for instruction: %shift
+; AVX2: Found an estimated cost of 4 for instruction: %shift
+; XOP: Found an estimated cost of 2 for instruction: %shift
+ %shift = ashr <2 x i64> %a, %b
+ ret <2 x i64> %shift
+}
+
+define <4 x i64> @var_shift_v4i64(<4 x i64> %a, <4 x i64> %b) {
+; CHECK: 'Cost Model Analysis' for function 'var_shift_v4i64':
+; SSE2: Found an estimated cost of 24 for instruction: %shift
+; SSE41: Found an estimated cost of 24 for instruction: %shift
+; AVX: Found an estimated cost of 2 for instruction: %shift
+; AVX2: Found an estimated cost of 4 for instruction: %shift
+; XOP: Found an estimated cost of 4 for instruction: %shift
+ %shift = ashr <4 x i64> %a, %b
+ ret <4 x i64> %shift
+}
+
+define <4 x i32> @var_shift_v4i32(<4 x i32> %a, <4 x i32> %b) {
+; CHECK: 'Cost Model Analysis' for function 'var_shift_v4i32':
+; SSE2: Found an estimated cost of 16 for instruction: %shift
+; SSE41: Found an estimated cost of 16 for instruction: %shift
+; AVX: Found an estimated cost of 16 for instruction: %shift
+; AVX2: Found an estimated cost of 1 for instruction: %shift
+; XOPAVX: Found an estimated cost of 2 for instruction: %shift
+; XOPAVX2: Found an estimated cost of 1 for instruction: %shift
+ %shift = ashr <4 x i32> %a, %b
+ ret <4 x i32> %shift
+}
+
+define <8 x i32> @var_shift_v8i32(<8 x i32> %a, <8 x i32> %b) {
+; CHECK: 'Cost Model Analysis' for function 'var_shift_v8i32':
+; SSE2: Found an estimated cost of 32 for instruction: %shift
+; SSE41: Found an estimated cost of 32 for instruction: %shift
+; AVX: Found an estimated cost of 2 for instruction: %shift
+; AVX2: Found an estimated cost of 1 for instruction: %shift
+; XOPAVX: Found an estimated cost of 4 for instruction: %shift
+; XOPAVX2: Found an estimated cost of 1 for instruction: %shift
+ %shift = ashr <8 x i32> %a, %b
+ ret <8 x i32> %shift
+}
+
+define <8 x i16> @var_shift_v8i16(<8 x i16> %a, <8 x i16> %b) {
+; CHECK: 'Cost Model Analysis' for function 'var_shift_v8i16':
+; SSE2: Found an estimated cost of 32 for instruction: %shift
+; SSE41: Found an estimated cost of 32 for instruction: %shift
+; AVX: Found an estimated cost of 32 for instruction: %shift
+; AVX2: Found an estimated cost of 32 for instruction: %shift
+; XOP: Found an estimated cost of 2 for instruction: %shift
+ %shift = ashr <8 x i16> %a, %b
+ ret <8 x i16> %shift
+}
+
+define <16 x i16> @var_shift_v16i16(<16 x i16> %a, <16 x i16> %b) {
+; CHECK: 'Cost Model Analysis' for function 'var_shift_v16i16':
+; SSE2: Found an estimated cost of 64 for instruction: %shift
+; SSE41: Found an estimated cost of 64 for instruction: %shift
+; AVX: Found an estimated cost of 2 for instruction: %shift
+; AVX2: Found an estimated cost of 10 for instruction: %shift
+; XOP: Found an estimated cost of 4 for instruction: %shift
+ %shift = ashr <16 x i16> %a, %b
+ ret <16 x i16> %shift
+}
+
+define <16 x i8> @var_shift_v16i8(<16 x i8> %a, <16 x i8> %b) {
+; CHECK: 'Cost Model Analysis' for function 'var_shift_v16i8':
+; SSE2: Found an estimated cost of 54 for instruction: %shift
+; SSE41: Found an estimated cost of 54 for instruction: %shift
+; AVX: Found an estimated cost of 54 for instruction: %shift
+; AVX2: Found an estimated cost of 54 for instruction: %shift
+; XOP: Found an estimated cost of 2 for instruction: %shift
+ %shift = ashr <16 x i8> %a, %b
+ ret <16 x i8> %shift
+}
+
+define <32 x i8> @var_shift_v32i8(<32 x i8> %a, <32 x i8> %b) {
+; CHECK: 'Cost Model Analysis' for function 'var_shift_v32i8':
+; SSE2: Found an estimated cost of 108 for instruction: %shift
+; SSE41: Found an estimated cost of 108 for instruction: %shift
+; AVX: Found an estimated cost of 2 for instruction: %shift
+; AVX2: Found an estimated cost of 24 for instruction: %shift
+; XOP: Found an estimated cost of 4 for instruction: %shift
+ %shift = ashr <32 x i8> %a, %b
+ ret <32 x i8> %shift
+}
+
+;
+; Uniform Variable Shifts
+;
+
+define <2 x i64> @splatvar_shift_v2i64(<2 x i64> %a, <2 x i64> %b) {
+; CHECK: 'Cost Model Analysis' for function 'splatvar_shift_v2i64':
+; SSE2: Found an estimated cost of 12 for instruction: %shift
+; SSE41: Found an estimated cost of 12 for instruction: %shift
+; AVX: Found an estimated cost of 12 for instruction: %shift
+; AVX2: Found an estimated cost of 4 for instruction: %shift
+; XOP: Found an estimated cost of 2 for instruction: %shift
+ %splat = shufflevector <2 x i64> %b, <2 x i64> undef, <2 x i32> zeroinitializer
+ %shift = ashr <2 x i64> %a, %splat
+ ret <2 x i64> %shift
+}
+
+define <4 x i64> @splatvar_shift_v4i64(<4 x i64> %a, <4 x i64> %b) {
+; CHECK: 'Cost Model Analysis' for function 'splatvar_shift_v4i64':
+; SSE2: Found an estimated cost of 24 for instruction: %shift
+; SSE41: Found an estimated cost of 24 for instruction: %shift
+; AVX: Found an estimated cost of 2 for instruction: %shift
+; AVX2: Found an estimated cost of 4 for instruction: %shift
+; XOP: Found an estimated cost of 4 for instruction: %shift
+ %splat = shufflevector <4 x i64> %b, <4 x i64> undef, <4 x i32> zeroinitializer
+ %shift = ashr <4 x i64> %a, %splat
+ ret <4 x i64> %shift
+}
+
+define <4 x i32> @splatvar_shift_v4i32(<4 x i32> %a, <4 x i32> %b) {
+; CHECK: 'Cost Model Analysis' for function 'splatvar_shift_v4i32':
+; SSE2: Found an estimated cost of 16 for instruction: %shift
+; SSE41: Found an estimated cost of 16 for instruction: %shift
+; AVX: Found an estimated cost of 16 for instruction: %shift
+; AVX2: Found an estimated cost of 1 for instruction: %shift
+; XOPAVX: Found an estimated cost of 2 for instruction: %shift
+; XOPAVX2: Found an estimated cost of 1 for instruction: %shift
+ %splat = shufflevector <4 x i32> %b, <4 x i32> undef, <4 x i32> zeroinitializer
+ %shift = ashr <4 x i32> %a, %splat
+ ret <4 x i32> %shift
+}
+
+define <8 x i32> @splatvar_shift_v8i32(<8 x i32> %a, <8 x i32> %b) {
+; CHECK: 'Cost Model Analysis' for function 'splatvar_shift_v8i32':
+; SSE2: Found an estimated cost of 32 for instruction: %shift
+; SSE41: Found an estimated cost of 32 for instruction: %shift
+; AVX: Found an estimated cost of 2 for instruction: %shift
+; AVX2: Found an estimated cost of 1 for instruction: %shift
+; XOPAVX: Found an estimated cost of 4 for instruction: %shift
+; XOPAVX2: Found an estimated cost of 1 for instruction: %shift
+ %splat = shufflevector <8 x i32> %b, <8 x i32> undef, <8 x i32> zeroinitializer
+ %shift = ashr <8 x i32> %a, %splat
+ ret <8 x i32> %shift
+}
+
+define <8 x i16> @splatvar_shift_v8i16(<8 x i16> %a, <8 x i16> %b) {
+; CHECK: 'Cost Model Analysis' for function 'splatvar_shift_v8i16':
+; SSE2: Found an estimated cost of 32 for instruction: %shift
+; SSE41: Found an estimated cost of 32 for instruction: %shift
+; AVX: Found an estimated cost of 32 for instruction: %shift
+; AVX2: Found an estimated cost of 32 for instruction: %shift
+; XOP: Found an estimated cost of 2 for instruction: %shift
+ %splat = shufflevector <8 x i16> %b, <8 x i16> undef, <8 x i32> zeroinitializer
+ %shift = ashr <8 x i16> %a, %splat
+ ret <8 x i16> %shift
+}
+
+define <16 x i16> @splatvar_shift_v16i16(<16 x i16> %a, <16 x i16> %b) {
+; CHECK: 'Cost Model Analysis' for function 'splatvar_shift_v16i16':
+; SSE2: Found an estimated cost of 64 for instruction: %shift
+; SSE41: Found an estimated cost of 64 for instruction: %shift
+; AVX: Found an estimated cost of 2 for instruction: %shift
+; AVX2: Found an estimated cost of 10 for instruction: %shift
+; XOP: Found an estimated cost of 4 for instruction: %shift
+ %splat = shufflevector <16 x i16> %b, <16 x i16> undef, <16 x i32> zeroinitializer
+ %shift = ashr <16 x i16> %a, %splat
+ ret <16 x i16> %shift
+}
+
+define <16 x i8> @splatvar_shift_v16i8(<16 x i8> %a, <16 x i8> %b) {
+; CHECK: 'Cost Model Analysis' for function 'splatvar_shift_v16i8':
+; SSE2: Found an estimated cost of 54 for instruction: %shift
+; SSE41: Found an estimated cost of 54 for instruction: %shift
+; AVX: Found an estimated cost of 54 for instruction: %shift
+; AVX2: Found an estimated cost of 54 for instruction: %shift
+; XOP: Found an estimated cost of 2 for instruction: %shift
+ %splat = shufflevector <16 x i8> %b, <16 x i8> undef, <16 x i32> zeroinitializer
+ %shift = ashr <16 x i8> %a, %splat
+ ret <16 x i8> %shift
+}
+
+define <32 x i8> @splatvar_shift_v32i8(<32 x i8> %a, <32 x i8> %b) {
+; CHECK: 'Cost Model Analysis' for function 'splatvar_shift_v32i8':
+; SSE2: Found an estimated cost of 108 for instruction: %shift
+; SSE41: Found an estimated cost of 108 for instruction: %shift
+; AVX: Found an estimated cost of 2 for instruction: %shift
+; AVX2: Found an estimated cost of 24 for instruction: %shift
+; XOP: Found an estimated cost of 4 for instruction: %shift
+ %splat = shufflevector <32 x i8> %b, <32 x i8> undef, <32 x i32> zeroinitializer
+ %shift = ashr <32 x i8> %a, %splat
+ ret <32 x i8> %shift
+}
+
+;
+; Constant Shifts
+;
+
+define <2 x i64> @constant_shift_v2i64(<2 x i64> %a) {
+; CHECK: 'Cost Model Analysis' for function 'constant_shift_v2i64':
+; SSE2: Found an estimated cost of 12 for instruction: %shift
+; SSE41: Found an estimated cost of 12 for instruction: %shift
+; AVX: Found an estimated cost of 12 for instruction: %shift
+; AVX2: Found an estimated cost of 4 for instruction: %shift
+; XOP: Found an estimated cost of 2 for instruction: %shift
+ %shift = ashr <2 x i64> %a, <i64 1, i64 7>
+ ret <2 x i64> %shift
+}
+
+define <4 x i64> @constant_shift_v4i64(<4 x i64> %a) {
+; CHECK: 'Cost Model Analysis' for function 'constant_shift_v4i64':
+; SSE2: Found an estimated cost of 24 for instruction: %shift
+; SSE41: Found an estimated cost of 24 for instruction: %shift
+; AVX: Found an estimated cost of 2 for instruction: %shift
+; AVX2: Found an estimated cost of 4 for instruction: %shift
+; XOP: Found an estimated cost of 4 for instruction: %shift
+ %shift = ashr <4 x i64> %a, <i64 1, i64 7, i64 15, i64 31>
+ ret <4 x i64> %shift
+}
+
+define <4 x i32> @constant_shift_v4i32(<4 x i32> %a) {
+; CHECK: 'Cost Model Analysis' for function 'constant_shift_v4i32':
+; SSE2: Found an estimated cost of 16 for instruction: %shift
+; SSE41: Found an estimated cost of 16 for instruction: %shift
+; AVX: Found an estimated cost of 16 for instruction: %shift
+; AVX2: Found an estimated cost of 1 for instruction: %shift
+; XOPAVX: Found an estimated cost of 2 for instruction: %shift
+; XOPAVX2: Found an estimated cost of 1 for instruction: %shift
+ %shift = ashr <4 x i32> %a, <i32 4, i32 5, i32 6, i32 7>
+ ret <4 x i32> %shift
+}
+
+define <8 x i32> @constant_shift_v8i32(<8 x i32> %a) {
+; CHECK: 'Cost Model Analysis' for function 'constant_shift_v8i32':
+; SSE2: Found an estimated cost of 32 for instruction: %shift
+; SSE41: Found an estimated cost of 32 for instruction: %shift
+; AVX: Found an estimated cost of 2 for instruction: %shift
+; AVX2: Found an estimated cost of 1 for instruction: %shift
+; XOPAVX: Found an estimated cost of 4 for instruction: %shift
+; XOPAVX2: Found an estimated cost of 1 for instruction: %shift
+ %shift = ashr <8 x i32> %a, <i32 4, i32 5, i32 6, i32 7, i32 0, i32 1, i32 2, i32 3>
+ ret <8 x i32> %shift
+}
+
+define <8 x i16> @constant_shift_v8i16(<8 x i16> %a) {
+; CHECK: 'Cost Model Analysis' for function 'constant_shift_v8i16':
+; SSE2: Found an estimated cost of 32 for instruction: %shift
+; SSE41: Found an estimated cost of 32 for instruction: %shift
+; AVX: Found an estimated cost of 32 for instruction: %shift
+; AVX2: Found an estimated cost of 32 for instruction: %shift
+; XOP: Found an estimated cost of 2 for instruction: %shift
+ %shift = ashr <8 x i16> %a, <i16 0, i16 1, i16 2, i16 3, i16 4, i16 5, i16 6, i16 7>
+ ret <8 x i16> %shift
+}
+
+define <16 x i16> @constant_shift_v16i16(<16 x i16> %a) {
+; CHECK: 'Cost Model Analysis' for function 'constant_shift_v16i16':
+; SSE2: Found an estimated cost of 64 for instruction: %shift
+; SSE41: Found an estimated cost of 64 for instruction: %shift
+; AVX: Found an estimated cost of 2 for instruction: %shift
+; AVX2: Found an estimated cost of 10 for instruction: %shift
+; XOP: Found an estimated cost of 4 for instruction: %shift
+ %shift = ashr <16 x i16> %a, <i16 0, i16 1, i16 2, i16 3, i16 4, i16 5, i16 6, i16 7, i16 0, i16 1, i16 2, i16 3, i16 4, i16 5, i16 6, i16 7>
+ ret <16 x i16> %shift
+}
+
+define <16 x i8> @constant_shift_v16i8(<16 x i8> %a) {
+; CHECK: 'Cost Model Analysis' for function 'constant_shift_v16i8':
+; SSE2: Found an estimated cost of 54 for instruction: %shift
+; SSE41: Found an estimated cost of 54 for instruction: %shift
+; AVX: Found an estimated cost of 54 for instruction: %shift
+; AVX2: Found an estimated cost of 54 for instruction: %shift
+; XOP: Found an estimated cost of 2 for instruction: %shift
+ %shift = ashr <16 x i8> %a, <i8 0, i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>
+ ret <16 x i8> %shift
+}
+
+define <32 x i8> @constant_shift_v32i8(<32 x i8> %a) {
+; CHECK: 'Cost Model Analysis' for function 'constant_shift_v32i8':
+; SSE2: Found an estimated cost of 108 for instruction: %shift
+; SSE41: Found an estimated cost of 108 for instruction: %shift
+; AVX: Found an estimated cost of 2 for instruction: %shift
+; AVX2: Found an estimated cost of 24 for instruction: %shift
+; XOP: Found an estimated cost of 4 for instruction: %shift
+ %shift = ashr <32 x i8> %a, <i8 0, i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0, i8 0, i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>
+ ret <32 x i8> %shift
+}
+
+;
+; Uniform Constant Shifts
+;
+
+define <2 x i64> @splatconstant_shift_v2i64(<2 x i64> %a) {
+; CHECK: 'Cost Model Analysis' for function 'splatconstant_shift_v2i64':
+; SSE2: Found an estimated cost of 4 for instruction: %shift
+; SSE41: Found an estimated cost of 4 for instruction: %shift
+; AVX: Found an estimated cost of 4 for instruction: %shift
+; AVX2: Found an estimated cost of 4 for instruction: %shift
+; XOP: Found an estimated cost of 2 for instruction: %shift
+ %shift = ashr <2 x i64> %a, <i64 7, i64 7>
+ ret <2 x i64> %shift
+}
+
+define <4 x i64> @splatconstant_shift_v4i64(<4 x i64> %a) {
+; CHECK: 'Cost Model Analysis' for function 'splatconstant_shift_v4i64':
+; SSE2: Found an estimated cost of 8 for instruction: %shift
+; SSE41: Found an estimated cost of 8 for instruction: %shift
+; AVX: Found an estimated cost of 2 for instruction: %shift
+; AVX2: Found an estimated cost of 4 for instruction: %shift
+; XOP: Found an estimated cost of 4 for instruction: %shift
+ %shift = ashr <4 x i64> %a, <i64 7, i64 7, i64 7, i64 7>
+ ret <4 x i64> %shift
+}
+
+define <4 x i32> @splatconstant_shift_v4i32(<4 x i32> %a) {
+; CHECK: 'Cost Model Analysis' for function 'splatconstant_shift_v4i32':
+; SSE2: Found an estimated cost of 1 for instruction: %shift
+; SSE41: Found an estimated cost of 1 for instruction: %shift
+; AVX: Found an estimated cost of 1 for instruction: %shift
+; AVX2: Found an estimated cost of 1 for instruction: %shift
+; XOPAVX: Found an estimated cost of 2 for instruction: %shift
+; XOPAVX2: Found an estimated cost of 1 for instruction: %shift
+ %shift = ashr <4 x i32> %a, <i32 5, i32 5, i32 5, i32 5>
+ ret <4 x i32> %shift
+}
+
+define <8 x i32> @splatconstant_shift_v8i32(<8 x i32> %a) {
+; CHECK: 'Cost Model Analysis' for function 'splatconstant_shift_v8i32':
+; SSE2: Found an estimated cost of 2 for instruction: %shift
+; SSE41: Found an estimated cost of 2 for instruction: %shift
+; AVX: Found an estimated cost of 2 for instruction: %shift
+; AVX2: Found an estimated cost of 1 for instruction: %shift
+; XOPAVX: Found an estimated cost of 4 for instruction: %shift
+; XOPAVX2: Found an estimated cost of 1 for instruction: %shift
+ %shift = ashr <8 x i32> %a, <i32 5, i32 5, i32 5, i32 5, i32 5, i32 5, i32 5, i32 5>
+ ret <8 x i32> %shift
+}
+
+define <8 x i16> @splatconstant_shift_v8i16(<8 x i16> %a) {
+; CHECK: 'Cost Model Analysis' for function 'splatconstant_shift_v8i16':
+; SSE2: Found an estimated cost of 1 for instruction: %shift
+; SSE41: Found an estimated cost of 1 for instruction: %shift
+; AVX: Found an estimated cost of 1 for instruction: %shift
+; AVX2: Found an estimated cost of 1 for instruction: %shift
+; XOP: Found an estimated cost of 2 for instruction: %shift
+ %shift = ashr <8 x i16> %a, <i16 3, i16 3, i16 3, i16 3, i16 3, i16 3, i16 3, i16 3>
+ ret <8 x i16> %shift
+}
+
+define <16 x i16> @splatconstant_shift_v16i16(<16 x i16> %a) {
+; CHECK: 'Cost Model Analysis' for function 'splatconstant_shift_v16i16':
+; SSE2: Found an estimated cost of 2 for instruction: %shift
+; SSE41: Found an estimated cost of 2 for instruction: %shift
+; AVX: Found an estimated cost of 2 for instruction: %shift
+; AVX2: Found an estimated cost of 10 for instruction: %shift
+; XOP: Found an estimated cost of 4 for instruction: %shift
+ %shift = ashr <16 x i16> %a, <i16 3, i16 3, i16 3, i16 3, i16 3, i16 3, i16 3, i16 3, i16 3, i16 3, i16 3, i16 3, i16 3, i16 3, i16 3, i16 3>
+ ret <16 x i16> %shift
+}
+
+define <16 x i8> @splatconstant_shift_v16i8(<16 x i8> %a) {
+; CHECK: 'Cost Model Analysis' for function 'splatconstant_shift_v16i8':
+; SSE2: Found an estimated cost of 4 for instruction: %shift
+; SSE41: Found an estimated cost of 4 for instruction: %shift
+; AVX: Found an estimated cost of 4 for instruction: %shift
+; AVX2: Found an estimated cost of 4 for instruction: %shift
+; XOP: Found an estimated cost of 2 for instruction: %shift
+ %shift = ashr <16 x i8> %a, <i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3>
+ ret <16 x i8> %shift
+}
+
+define <32 x i8> @splatconstant_shift_v32i8(<32 x i8> %a) {
+; CHECK: 'Cost Model Analysis' for function 'splatconstant_shift_v32i8':
+; SSE2: Found an estimated cost of 8 for instruction: %shift
+; SSE41: Found an estimated cost of 8 for instruction: %shift
+; AVX: Found an estimated cost of 2 for instruction: %shift
+; AVX2: Found an estimated cost of 24 for instruction: %shift
+; XOP: Found an estimated cost of 4 for instruction: %shift
+ %shift = ashr <32 x i8> %a, <i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3>
+ ret <32 x i8> %shift
+}
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