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...properly but interacts badly with the GHC calling convention. The problem is the GHC calling convention uses unconventional registers for argument passing. On x86-32 this is the four registers, ebx, ebp, esi, edi. The 'alignstack' attribute causes the ebp register to be clobbered. e.g _s1eJ_ret: ## BB#0: pushl %ebp movl %esp, %ebp andl $-16, %esp subl $32, %esp movl %ebp, 16(%esp) ## 4-byte Spill [...] movl 16(%esp), %eax ## 4-byte Reload movl %edi, -4(%eax) I'm not really sure what to do about this at the moment, will keep investigati...

David Terei wrote: > Hi all, > > I'm working on using LLVM as a back-end for the Haskell GHC compiler. As > part of that work I have modified LLVM to include a new custom calling > convention for performance reasons as outlined previously in a > conversation on this mailing list: > > http://nondot.org/sabre/LLVMNotes/GlobalRegisterVariables.txt > > This

Hi all, I'm working on using LLVM as a back-end for the Haskell GHC compiler. As part of that work I have modified LLVM to include a new custom calling convention for performance reasons as outlined previously in a conversation on this mailing list: http://nondot.org/sabre/LLVMNotes/GlobalRegisterVariables.txt This custom calling convention on x86-32 needs to handle just 4 parameters,