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Add some tests for shr-and folding

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16507 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-09-24 15:18:43 +00:00
parent 5fbb1f8fcc
commit 71dd801055
1 changed files with 17 additions and 0 deletions
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17
test/Transforms/InstCombine/and.ll
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@ -119,3 +119,20 @@ bool %test18(int %A) {
ret bool %C
}
int %test19(int %A) {
%B = shl int %A, ubyte 3
%C = and int %B, -2 ;; Clearing a zero bit
ret int %C
}
ubyte %test20(ubyte %A) {
%C = shr ubyte %A, ubyte 7
%D = and ubyte %C, 1 ;; Unneeded
ret ubyte %D
}
sbyte %test21(sbyte %A) {
%C = shr sbyte %A, ubyte 7 ;; sign extend
%D = and sbyte %C, 1 ;; chop off sign
ret sbyte %D
}