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Add some tests for difficult reassociation cases

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7824 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-08-13 19:01:09 +00:00
parent 19df3876e6
commit d2ae23979c
1 changed files with 25 additions and 4 deletions
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29
test/Transforms/InstCombine/add.ll
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@ -1,9 +1,6 @@
; This test makes sure that add instructions are properly eliminated.
;
; This also tests that a subtract with a constant is properly converted
; to a add w/negative constant
; RUN: as < %s | opt -instcombine -die | dis | not grep add
; RUN: as < %s | opt -instcombine -die | dis | grep -v OK | not grep add
implementation
@ -72,3 +69,27 @@ bool %test11(ubyte %A) {
%c = setne ubyte %B, 0 ; === A != 1
ret bool %c
}
int %test12(int %A, int %B) {
%C_OK = add int %B, %A ; Should be transformed into shl A, 1
br label %X
X:
%D = add int %C_OK, %A
ret int %D
}
int %test13(int %A, int %B, int %C) {
%D_OK = add int %A, %B
%E_OK = add int %D_OK, %C
%F = add int %E_OK, %A ;; shl A, 1
ret int %F
}
uint %test14(uint %offset, uint %difference) {
%tmp.2 = and uint %difference, 3
%tmp.3_OK = add uint %tmp.2, %offset
%tmp.5.mask = and uint %difference, 4294967292
%tmp.8 = add uint %tmp.3_OK, %tmp.5.mask ; == add %offset, %difference
ret uint %tmp.8
}