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Add a bunch of tests for ANDs that should be eliminated.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19216 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-01-01 16:13:19 +00:00
parent 05b402ce9f
commit e768ff2cdc
1 changed files with 13 additions and 0 deletions
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13
test/Transforms/InstCombine/and.ll
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@ -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
}