From e768ff2cdca504c42b5bf1ab9c7c57b54be381a3 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Sat, 1 Jan 2005 16:13:19 +0000 Subject: [PATCH] Add a bunch of tests for ANDs that should be eliminated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19216 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/Transforms/InstCombine/and.ll | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/test/Transforms/InstCombine/and.ll b/test/Transforms/InstCombine/and.ll index 67b34a3be5e..b217c7e39c1 100644 --- a/test/Transforms/InstCombine/and.ll +++ b/test/Transforms/InstCombine/and.ll @@ -179,3 +179,16 @@ ubyte %test27(ubyte %A) { %E = add ubyte %D, 16 ret ubyte %E } + +int %test28(int %X) { ;; This is juse a zero extending shr. + %Y = shr int %X, ubyte 24 ;; Sign extend + %Z = and int %Y, 255 ;; Mask out sign bits + ret int %Z +} + +int %test29(ubyte %X) { + %Y = cast ubyte %X to int + %Z = and int %Y, 255 ;; Zero extend makes this unneeded. + ret int %Z +} +