llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-08-08 04:25:43 +00:00

Files

Chris Lattner 3ffdff6448 Fix a scary bug with signed division by a power of two. We used to generate:

s:   ;; X / 4
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %ECX, %EAX
        sar %ECX, 1
        shr %ECX, 30
        mov %EDX, %EAX
        add %EDX, %ECX
        sar %EAX, 2
        ret

When we really meant:

s:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %ECX, %EAX
        sar %ECX, 1
        shr %ECX, 30
        add %EAX, %ECX
        sar %EAX, 2
        ret

Hey, this also reduces register pressure too :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16761 91177308-0d34-0410-b5e6-96231b3b80d8

2004-10-06 04:19:43 +00:00

CBackend

FreeBSD uses GCC. Patch contributed by Jeff Cohen!

2004-10-06 03:15:44 +00:00

PowerPC

Generate better code by being far less clever when it comes to the select instruction. Don't create overlapping register lifetimes

2004-09-29 05:00:31 +00:00

Skeleton

Make sure to set the operand list

2004-09-21 17:30:54 +00:00

Sparc

I think this will handle double args.