mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-26 21:32:10 +00:00
4333f49afe
turn icmp eq a+x, b+x into icmp eq a, b if a+x or b+x has other uses. This may have been increasing register pressure leading to the bzip2 slowdown. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63487 91177308-0d34-0410-b5e6-96231b3b80d8
42 lines
739 B
LLVM
42 lines
739 B
LLVM
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep xor
|
|
|
|
define i1 @test1(i8 %x, i8 %y) {
|
|
%X = xor i8 %x, 128
|
|
%Y = xor i8 %y, 128
|
|
%tmp = icmp slt i8 %X, %Y
|
|
ret i1 %tmp
|
|
}
|
|
|
|
define i1 @test2(i8 %x, i8 %y) {
|
|
%X = xor i8 %x, 128
|
|
%Y = xor i8 %y, 128
|
|
%tmp = icmp ult i8 %X, %Y
|
|
ret i1 %tmp
|
|
}
|
|
|
|
define i1 @test3(i8 %x) {
|
|
%X = xor i8 %x, 128
|
|
%tmp = icmp uge i8 %X, 15
|
|
ret i1 %tmp
|
|
}
|
|
|
|
define i1 @test4(i8 %x, i8 %y) {
|
|
%X = xor i8 %x, 127
|
|
%Y = xor i8 %y, 127
|
|
%tmp = icmp slt i8 %X, %Y
|
|
ret i1 %tmp
|
|
}
|
|
|
|
define i1 @test5(i8 %x, i8 %y) {
|
|
%X = xor i8 %x, 127
|
|
%Y = xor i8 %y, 127
|
|
%tmp = icmp ult i8 %X, %Y
|
|
ret i1 %tmp
|
|
}
|
|
|
|
define i1 @test6(i8 %x) {
|
|
%X = xor i8 %x, 127
|
|
%tmp = icmp uge i8 %X, 15
|
|
ret i1 %tmp
|
|
}
|