From 8be17397c08cf768f33016f42e6a75a3f214d331 Mon Sep 17 00:00:00 2001
From: Eli Friedman <eli.friedman@gmail.com>
Date: Sat, 18 Jul 2009 09:53:21 +0000
Subject: Add combine: X sdiv (1 << Y) -> X udiv (1 << Y) when X doesn't have
 the sign bit set.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76304 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/Transforms/InstCombine/sdiv-shift.ll | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 test/Transforms/InstCombine/sdiv-shift.ll

(limited to 'test')

diff --git a/test/Transforms/InstCombine/sdiv-shift.ll b/test/Transforms/InstCombine/sdiv-shift.ll
new file mode 100644
index 0000000..3fba05d
--- /dev/null
+++ b/test/Transforms/InstCombine/sdiv-shift.ll
@@ -0,0 +1,9 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep div
+
+define i32 @a(i16 zeroext %x, i32 %y) nounwind {
+entry:
+	%conv = zext i16 %x to i32
+	%s = shl i32 2, %y
+	%d = sdiv i32 %conv, %s
+	ret i32 %d
+}
-- 
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