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Add a test case to make sure that constant folding of the bit counting

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intrinsics works.

llvm-svn: 35577
This commit is contained in:
Reid Spencer 2007-04-02 01:45:31 +00:00
parent b7b75145f1
commit a3bc850712
1 changed files with 16 additions and 0 deletions
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16
llvm/test/Transforms/InstCombine/bitcount.ll Normal file
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; Tests to make sure bit counts of constants are folded
; RUN: llvm-as < %s | opt -instcombine | llvm-dis -o /dev/null -f &&
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep 'llvm.ct'
declare i32 @llvm.ctpop.i31(i31 %val)
declare i32 @llvm.cttz.i32(i32 %val)
declare i32 @llvm.ctlz.i33(i33 %val)
define i32 %test(i32 %A) {
%c1 = i32 call @llvm.ctpop(i31 12415124)
%c2 = i32 call @llvm.cttz(i32 87359874)
%c3 = i32 call @llvm.ctlz(i33 87359874)
%r1 = add i32 %c1, %c2
%r2 = add i32 %r1, %c3
ret i32 %r2
}