[InstCombine][AVX2] Added VPERMD/VPERMPS shuffle combining placeholder tests.

For future support for VPERMD/VPERMPS to generic shuffles combines

llvm-svn: 268166

1 files changed, 87 insertions, 0 deletions

diff --git a/llvm/test/Transforms/InstCombine/x86-avx2.ll b/llvm/test/Transforms/InstCombine/x86-avx2.ll
new file mode 100644
index 00000000000..ef6d4e6d22d
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/x86-avx2.ll
@@ -0,0 +1,87 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -instcombine -S | FileCheck %s
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+
+; FIXME: Verify that instcombine is able to fold identity shuffles.
+
+define <8 x i32> @identity_test_vpermd(<8 x i32> %a0) {
+; CHECK-LABEL: @identity_test_vpermd(
+; CHECK-NEXT:    [[A:%.*]] = tail call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> [[A:%.*]]0, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>)
+; CHECK-NEXT:    ret <8 x i32> [[A]]
+;
+  %a = tail call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>)
+  ret <8 x i32> %a
+}
+
+define <8 x float> @identity_test_vpermps(<8 x float> %a0) {
+; CHECK-LABEL: @identity_test_vpermps(
+; CHECK-NEXT:    [[A:%.*]] = tail call <8 x float> @llvm.x86.avx2.permps(<8 x float> [[A:%.*]]0, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>)
+; CHECK-NEXT:    ret <8 x float> [[A]]
+;
+  %a = tail call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>)
+  ret <8 x float> %a
+}
+
+; FIXME: Instcombine should be able to fold the following shuffle to a builtin shufflevector
+; with a shuffle mask of all zeroes.
+
+define <8 x i32> @zero_test_vpermd(<8 x i32> %a0) {
+; CHECK-LABEL: @zero_test_vpermd(
+; CHECK-NEXT:    [[A:%.*]] = tail call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> [[A:%.*]]0, <8 x i32> zeroinitializer)
+; CHECK-NEXT:    ret <8 x i32> [[A]]
+;
+  %a = tail call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> zeroinitializer)
+  ret <8 x i32> %a
+}
+
+define <8 x float> @zero_test_vpermps(<8 x float> %a0) {
+; CHECK-LABEL: @zero_test_vpermps(
+; CHECK-NEXT:    [[A:%.*]] = tail call <8 x float> @llvm.x86.avx2.permps(<8 x float> [[A:%.*]]0, <8 x i32> zeroinitializer)
+; CHECK-NEXT:    ret <8 x float> [[A]]
+;
+  %a = tail call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> zeroinitializer)
+  ret <8 x float> %a
+}
+
+; FIXME: Verify that instcombine is able to fold constant shuffles.
+
+define <8 x i32> @shuffle_test_vpermd(<8 x i32> %a0) {
+; CHECK-LABEL: @shuffle_test_vpermd(
+; CHECK-NEXT:    [[A:%.*]] = tail call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> [[A:%.*]]0, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
+; CHECK-NEXT:    ret <8 x i32> [[A]]
+;
+  %a = tail call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
+  ret <8 x i32> %a
+}
+
+define <8 x float> @shuffle_test_vpermps(<8 x float> %a0) {
+; CHECK-LABEL: @shuffle_test_vpermps(
+; CHECK-NEXT:    [[A:%.*]] = tail call <8 x float> @llvm.x86.avx2.permps(<8 x float> [[A:%.*]]0, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
+; CHECK-NEXT:    ret <8 x float> [[A]]
+;
+  %a = tail call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
+  ret <8 x float> %a
+}
+
+; FIXME: Verify that instcombine is able to fold constant shuffles with undef mask elements.
+
+define <8 x i32> @undef_test_vpermd(<8 x i32> %a0) {
+; CHECK-LABEL: @undef_test_vpermd(
+; CHECK-NEXT:    [[A:%.*]] = tail call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> [[A:%.*]]0, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
+; CHECK-NEXT:    ret <8 x i32> [[A]]
+;
+  %a = tail call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
+  ret <8 x i32> %a
+}
+
+define <8 x float> @undef_test_vpermps(<8 x float> %a0) {
+; CHECK-LABEL: @undef_test_vpermps(
+; CHECK-NEXT:    [[A:%.*]] = tail call <8 x float> @llvm.x86.avx2.permps(<8 x float> [[A:%.*]]0, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
+; CHECK-NEXT:    ret <8 x float> [[A]]
+;
+  %a = tail call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
+  ret <8 x float> %a
+}
+
+declare <8 x i32> @llvm.x86.avx2.permd(<8 x i32>, <8 x i32>)
+declare <8 x float> @llvm.x86.avx2.permps(<8 x float>, <8 x i32>)