From 1041553424cb0a9af03398ee0bff0d1a23fccc6f Mon Sep 17 00:00:00 2001
From: Eli Friedman <eli.friedman@gmail.com>
Date: Sat, 6 Jun 2009 06:05:10 +0000
Subject: Get rid of some bogus patterns for X86vzmovl.  Don't create
 VZEXT_MOVL nodes for vectors with an i16 element type.  Add an optimization
 for building a vector which is all zeros/undef except for the bottom element,
 where the bottom element is an i8 or i16.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72988 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/X86/2009-06-05-VZextByteShort.ll | 37 +++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 test/CodeGen/X86/2009-06-05-VZextByteShort.ll

(limited to 'test/CodeGen/X86/2009-06-05-VZextByteShort.ll')

diff --git a/test/CodeGen/X86/2009-06-05-VZextByteShort.ll b/test/CodeGen/X86/2009-06-05-VZextByteShort.ll
new file mode 100644
index 0000000000..220423aa98
--- /dev/null
+++ b/test/CodeGen/X86/2009-06-05-VZextByteShort.ll
@@ -0,0 +1,37 @@
+; RUN: llvm-as < %s | llc -march=x86 -mattr=+mmx,+sse2 > %t1
+; RUN: grep movzwl %t1 | count 2
+; RUN: grep movzbl %t1 | count 2
+; RUN: grep movd %t1 | count 4
+
+define <4 x i16> @a(i32* %x1) nounwind {
+  %x2 = load i32* %x1
+  %x3 = lshr i32 %x2, 1
+  %x = trunc i32 %x3 to i16
+  %r = insertelement <4 x i16> zeroinitializer, i16 %x, i32 0
+  ret <4 x i16> %r
+}
+
+define <8 x i16> @b(i32* %x1) nounwind {
+  %x2 = load i32* %x1
+  %x3 = lshr i32 %x2, 1
+  %x = trunc i32 %x3 to i16
+  %r = insertelement <8 x i16> zeroinitializer, i16 %x, i32 0
+  ret <8 x i16> %r
+}
+
+define <8 x i8> @c(i32* %x1) nounwind {
+  %x2 = load i32* %x1
+  %x3 = lshr i32 %x2, 1
+  %x = trunc i32 %x3 to i8
+  %r = insertelement <8 x i8> zeroinitializer, i8 %x, i32 0
+  ret <8 x i8> %r
+}
+
+define <16 x i8> @d(i32* %x1) nounwind {
+  %x2 = load i32* %x1
+  %x3 = lshr i32 %x2, 1
+  %x = trunc i32 %x3 to i8
+  %r = insertelement <16 x i8> zeroinitializer, i8 %x, i32 0
+  ret <16 x i8> %r
+}
+
-- 
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