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edd5e4957a
llvm-6502/lib
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Chris Lattner edd5e4957a Implement negation of longs efficiently. For this testcase: 
long %test(long %X) {
        %Y = sub long 0, %X
        ret long %Y
}

We used to generate:

test:
        sub %ESP, 4
        mov DWORD PTR [%ESP], %ESI
        mov %ECX, DWORD PTR [%ESP + 8]
        mov %ESI, DWORD PTR [%ESP + 12]
        mov %EAX, 0
        mov %EDX, 0
        sub %EAX, %ECX
        sbb %EDX, %ESI
        mov %ESI, DWORD PTR [%ESP]
        add %ESP, 4
        ret

Now we generate:

test:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EDX, DWORD PTR [%ESP + 8]
        neg %EAX
        adc %EDX, 0
        neg %EDX
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12681 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-06 01:48:06 +00:00
..
Analysis Sparc don't got not "sqrtl", bum bum bum 2004-04-05 19:05:15 +00:00
Archive Use the true, decoded name of the archive member in getObjectType. 2004-03-31 19:51:00 +00:00
AsmParser Support getelementptr instructions which use uint's to index into structure 2004-04-05 01:30:04 +00:00
Bytecode Implement support for a new LLVM 1.3 bytecode format, which uses uint's 2004-04-05 01:27:26 +00:00
CodeGen MBB::remove should not modify the iterator passed in 2004-03-31 21:59:59 +00:00
Debugger
ExecutionEngine Adjust to new interface 2004-04-04 19:47:06 +00:00
Linker Fix linking of constant expr casts due to type resolution changes. With 2004-03-31 02:58:28 +00:00
Support lli no longer takes the -quiet option! 2004-04-05 20:28:41 +00:00
Target Implement negation of longs efficiently. For this testcase: 2004-04-06 01:48:06 +00:00
Transforms Fix a bug in yesterdays checkins which broke siod. siod is a great testcase! :) 2004-04-05 16:02:41 +00:00
VMCore Do not mangle intrinsics in any way! 2004-04-05 20:17:53 +00:00
Makefile