Fix PR14204

- Add missing pattern on X86ISD::VZEXT from VR256 to VR256 when AVX2 is enabled.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166947 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86InstrSSE.td b/lib/Target/X86/X86InstrSSE.td
index e9c7f3e7f1c33416abe05d1ddac1bf58e50e3251..3fcc0dc4149478c99b49c592c9be55b37edbee29 100644 (file)
--- a/lib/Target/X86/X86InstrSSE.td
+++ b/lib/Target/X86/X86InstrSSE.td
@@ -5850,6 +5850,21 @@ let Predicates = [HasAVX2] in {
   def : Pat<(v4i64  (X86vzext (v8i16 VR128:$src))), (VPMOVZXWQYrr VR128:$src)>;
 
   def : Pat<(v4i64  (X86vzext (v4i32 VR128:$src))), (VPMOVZXDQYrr VR128:$src)>;
+
+  def : Pat<(v16i16 (X86vzext (v32i8 VR256:$src))),
+            (VPMOVZXBWYrr (EXTRACT_SUBREG VR256:$src, sub_xmm))>;
+  def : Pat<(v8i32 (X86vzext (v32i8 VR256:$src))),
+            (VPMOVZXBDYrr (EXTRACT_SUBREG VR256:$src, sub_xmm))>;
+  def : Pat<(v4i64 (X86vzext (v32i8 VR256:$src))),
+            (VPMOVZXBQYrr (EXTRACT_SUBREG VR256:$src, sub_xmm))>;
+
+  def : Pat<(v8i32 (X86vzext (v16i16 VR256:$src))),
+            (VPMOVZXWDYrr (EXTRACT_SUBREG VR256:$src, sub_xmm))>;
+  def : Pat<(v4i64 (X86vzext (v16i16 VR256:$src))),
+            (VPMOVZXWQYrr (EXTRACT_SUBREG VR256:$src, sub_xmm))>;
+
+  def : Pat<(v4i64 (X86vzext (v8i32 VR256:$src))),
+            (VPMOVZXDQYrr (EXTRACT_SUBREG VR256:$src, sub_xmm))>;
 }
 
 let Predicates = [HasAVX] in {

diff --git a/test/CodeGen/X86/pr14204.ll b/test/CodeGen/X86/pr14204.ll
new file mode 100644 (file)
index 0000000..42e362b
--- /dev/null
+++ b/test/CodeGen/X86/pr14204.ll
@@ -0,0 +1,15 @@
+; RUN: llc < %s -mtriple=x86_64-linux-pc -mcpu=core-avx2 | FileCheck %s
+
+; FIXME: vpmovsxwd should be generated instead of vpmovzxwd followed by
+; SLL/SRA.
+
+define <8 x i32> @foo(<8 x i1> %bar) nounwind readnone {
+entry:
+  %s = sext <8 x i1> %bar to <8 x i32>
+  ret <8 x i32> %s
+; CHECK: foo
+; CHECK: vpmovzxwd
+; CHECK: vpslld
+; CHECK: vpsrad
+; CHECK: ret
+}