From ca7c690d3b51f44ccb1ec1bb1c01bd74610b3f8e Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Tue, 15 Dec 2009 00:41:36 +0000
Subject: Propagate zest through logical shift.

llvm-svn: 91378
---
 llvm/test/CodeGen/X86/setcc.ll    | 13 +++++++++++++
 llvm/test/CodeGen/X86/zext-shl.ll | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 llvm/test/CodeGen/X86/setcc.ll
 create mode 100644 llvm/test/CodeGen/X86/zext-shl.ll

(limited to 'llvm/test/CodeGen/X86')

diff --git a/llvm/test/CodeGen/X86/setcc.ll b/llvm/test/CodeGen/X86/setcc.ll
new file mode 100644
index 00000000000..785a6a900b5
--- /dev/null
+++ b/llvm/test/CodeGen/X86/setcc.ll
@@ -0,0 +1,13 @@
+; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s
+
+define zeroext i16 @t1(i16 zeroext %x) nounwind readnone ssp {
+entry:
+; CHECK: t1:
+; CHECK: seta %al
+; CHECK: movzbl %al, %eax
+; CHECK: shll $5, %eax
+  %0 = icmp ugt i16 %x, 26                        ; <i1> [#uses=1]
+  %iftmp.1.0 = select i1 %0, i16 32, i16 0        ; <i16> [#uses=1]
+  ret i16 %iftmp.1.0
+}
+
diff --git a/llvm/test/CodeGen/X86/zext-shl.ll b/llvm/test/CodeGen/X86/zext-shl.ll
new file mode 100644
index 00000000000..bc3198a9d17
--- /dev/null
+++ b/llvm/test/CodeGen/X86/zext-shl.ll
@@ -0,0 +1,38 @@
+; RUN: llc < %s -march=x86 | FileCheck %s
+
+define i32 @t1(i8 zeroext %x) nounwind readnone ssp {
+entry:
+; CHECK: t1:
+; CHECK: shll
+; CHECK-NOT: movzwl
+; CHECK: ret
+  %0 = zext i8 %x to i16
+  %1 = shl i16 %0, 5
+  %2 = zext i16 %1 to i32
+  ret i32 %2
+}
+
+define i32 @t2(i8 zeroext %x) nounwind readnone ssp {
+entry:
+; CHECK: t2:
+; CHECK: shrl
+; CHECK-NOT: movzwl
+; CHECK: ret
+  %0 = zext i8 %x to i16
+  %1 = lshr i16 %0, 3
+  %2 = zext i16 %1 to i32
+  ret i32 %2
+}
+
+define i32 @t3(i8 zeroext %x, i8 zeroext %y) nounwind readnone ssp {
+entry:
+; CHECK: t3:
+; CHECK: shll
+; CHECK-NOT: movzwl
+; CHECK: ret
+  %0 = zext i8 %x to i16
+  %1 = zext i8 %y to i16
+  %2 = shl i16 %0, %1
+  %3 = zext i16 %2 to i32
+  ret i32 %3
+}
-- 
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