search for: spillslots

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2012 Nov 24
2
[LLVMdev] Fwd: Prevention register promotion at the isel codegen phase
Sorry, forgot to Reply-All. Begin forwarded message: > From: Steve Montgomery <stephen.montgomery3 at btinternet.com> > Subject: Re: [LLVMdev] Prevention register promotion at the isel codegen phase > Date: 24 November 2012 17:09:58 GMT > To: Joseph Pusdesris <joe at pusdesris.com> > > I had a similar problem trying to implement reg-mem operations. The solution I
2012 Nov 24
0
[LLVMdev] Fwd: Prevention register promotion at the isel codegen phase
Yes, this is very helpful! Thank you! How does this work when exiting a variable's liveness range? Will it automatically know to free the stack slot for reuse? -Joe On Sat, Nov 24, 2012 at 12:23 PM, Steve Montgomery < stephen.montgomery3 at btinternet.com> wrote: > Sorry, forgot to Reply-All. > > Begin forwarded message: > > *From: *Steve Montgomery
2013 Sep 29
1
[LLVMdev] cannot build 3.3, problems with alternate architectures
...0: error: ‘RegClassVector’ has not been declared In file included from AArch64Subtarget.cpp:14:0: AArch64Subtarget.h:29:57: error: expected class-name before ‘{’ token PPCFrameLowering.h: In member function ‘virtual const llvm::TargetFrameLowering::SpillSlot* llvm::PPCFrameLowering::getCalleeSavedSpillSlots(unsigned int&) const’: PPCFrameLowering.h:138:51: error: ‘X31’ is not a member of ‘llvm::PPC’ I'm using the same configure I did for 3.2 (well, I didn't explicitly set gcc before): export REQUIRES_RTTI=1 export REQUIRES_EH=1 export CC=gcc export CXX=g++ ./configure --prefix=/opt/llvm...
2017 May 01
4
Marking a register as reserved midway through register allocation
Hey all, I'm attempting to rewrite something that the AVR backend used to support (through an extremely dirty hack that was reverted before the upstreaming of the target). The removal of the hack can be seen on GitHub https://github.com/avr-llvm/llvm/pull/226/files On the AVR architecture, the stack pointer is not in a standard register, but rather it is a special register which can only
2016 Aug 17
3
RFC: Disambiguate RegClass->getSize()
*** Problem The documentation for function "getSize" in both MCRegisterClass and TargetRegisterClass states: /// getSize - Return the size of the register in bytes, which is also the size /// of a stack slot allocated to hold a spilled copy of this register. The problem is that these two values are not always the same. For example, Hexagon has predicate registers that are 8
2018 Jul 22
2
Finding scratch register after function call
>It should be possible to get llvm to produce very good code for the Z80... Yes, I was thinking that too. These techniques didn't exist back then, so I'm really looking forward to the point where the first regular C sources can be compiled and see the magic happening in action live :) ------------------------------------------------------------------------ *From:* Bruce Hoult