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

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19217 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-01-01 16:13:43 +00:00
parent e768ff2cdc
commit 296fcbaf2c
1 changed files with 27 additions and 0 deletions
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27
test/Transforms/InstCombine/cast.ll
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@ -128,3 +128,30 @@ bool %test20(bool %B) {
%D = setlt int %C, -1
ret bool %D ;; false
}
uint %test21(uint %X) {
%Y = cast uint %X to sbyte
%Z = cast sbyte %Y to uint ;; sext -> zext -> and -> nop
%RV = and uint %Z, 255
ret uint %RV
}
uint %test22(uint %X) {
%Y = cast uint %X to sbyte
%Z = cast sbyte %Y to uint ;; sext -> zext -> and -> nop
%RV = shl uint %Z, ubyte 24
ret uint %RV
}
int %test23(int %X) {
%Y = cast int %X to ushort ;; Turn into an AND even though X
%Z = cast ushort %Y to int ;; and Z are signed.
ret int %Z
}
bool %test24(bool %C) {
%X = select bool %C, uint 14, uint 1234
%Y = cast uint %X to bool ;; Fold cast into select
ret bool %Y
}