search for: fnstart

...e enabled under a shift context. But I think maybe we could expand it to as more case as possible. The original issuse of it: For code as below: unsigned array[4]; unsigned foo(unsigned long x) { return array[(x>>2)&3ul]; sequence before this canonicalisation (ARM): foo: .fnstart @ BB#0: @ %entry lsrs r0, r0, #2 movs r1, #3 ands r1, r0 lsls r0, r1, #2 ldr r1, .LCPI0_0 ldr r0, [r1, r0] bx lr .p2align 2 sequence after this canonicalisation: foo: .fnstart @ BB#0: @ %entry movs r1, #12 ands r1, r0 ldr r0, .LCPI0_0...

...ActualSize); > > > > - BufferEnd = BufferBegin+ActualSize; > > > > - EmittedFunctions[F.getFunction()].ExceptionTable = BufferBegin; > > > > - uint8_t *EhStart; > > > > - uint8_t *FrameRegister = DE->EmitDwarfTable(F, *this, FnStart, FnEnd, > > > > - EhStart); > > > > + while (true) { > > > > + BufferBegin = CurBufferPtr = > > > > MemMgr->startExceptionTable(F.getFunction(), > > > > + > > > > Actual...

On Mon, 16 Jun 2008, Gary Benson wrote: > When you genetate code on PowerPC you need to explicitly invalidate > the instruction cache to force the processor to reread it. In LLVM > there is code to do this for function stubs on Macintosh, but not > for other platforms and not for JITted code generally. Applied, thanks!

...__) - sys_icache_invalidate(Addr, len); -#endif -} - /// getFunctionStub - This returns a pointer to a function stub, creating /// one on demand as needed. void *JITResolver::getFunctionStub(Function *F) { @@ -756,7 +742,7 @@ } // Invalidate the icache if necessary. - synchronizeICache(FnStart, FnEnd-FnStart); + TheJIT->getJITInfo().InvalidateInstructionCache(FnStart, FnEnd-FnStart); // Add it to the JIT symbol table if the host wants it. AddFunctionToSymbolTable(F.getFunction()->getNameStart(),

On 8 December 2016 at 02:34, Jojo Ma <jojo.ma at linaro.org> wrote: > It would be profitable as well if we could enable the canonicalisation on > it. > sequence before this canonicalisation (ARM): > test: > .fnstart > @ BB#0: @ %entry > movw r1, #65534 > and r1, r0, r1 > ubfx r0, r0, #1, #15 > add r0, r0, r1, lsr #1 > bx lr > > sequence after this canonicalisation: > test: > .fnstart > @ BB#0: @ %entry > ubfx r0...

Hi everyone, vmkit requires to know the size of a jitted method before emitting the method. This allows to allocate the correct size for the method. The attached patch creates this functionality when the flag SizedMemoryCode is on. In order to implement this functionality, i had to virtualize some MachineCodeEmitter functions. Is it OK to commit the patch? Thanks, Nicolas --------------

Hi all, When you genetate code on PowerPC you need to explicitly invalidate the instruction cache to force the processor to reread it. In LLVM there is code to do this for function stubs on Macintosh, but not for other platforms and not for JITted code generally. The attached patch adds support for GNU platforms, but I can't figure out a nice way to call it for all generated code. Can

...> + >> + } >> + >> + >> TheJIT->updateGlobalMapping(F.getFunction(), CurBufferPtr); >> >> MBBLocations.clear(); >> @@ -579,12 +614,18 @@ >> DOUT << "Disassembled code:\n" >> << sys::disassembleBuffer(FnStart, FnEnd-FnStart, >> (uintptr_t)FnStart); >> #endif >> + >> if (ExceptionHandling) { >> uintptr_t ActualSize; >> + if (SizedMemoryCode) { >> + SizeEmitter sz(LabelLocations); >> + DE->EmitDwarfTable(F, sz, FnStart, FnEnd); >&g...

...unction()->getAlignment(), 8U)); > + > + } > + > + > TheJIT->updateGlobalMapping(F.getFunction(), CurBufferPtr); > > MBBLocations.clear(); > @@ -579,12 +614,18 @@ > DOUT << "Disassembled code:\n" > << sys::disassembleBuffer(FnStart, FnEnd-FnStart, > (uintptr_t)FnStart); > #endif > + > if (ExceptionHandling) { > uintptr_t ActualSize; > + if (SizedMemoryCode) { > + SizeEmitter sz(LabelLocations); > + DE->EmitDwarfTable(F, sz, FnStart, FnEnd); > + ActualSize = sz.getCurrent...

...;> + >>> + >>> TheJIT->updateGlobalMapping(F.getFunction(), CurBufferPtr); >>> >>> MBBLocations.clear(); >>> @@ -579,12 +614,18 @@ >>> DOUT << "Disassembled code:\n" >>> << sys::disassembleBuffer(FnStart, FnEnd-FnStart, >>> (uintptr_t)FnStart); >>> #endif >>> + >>> if (ExceptionHandling) { >>> uintptr_t ActualSize; >>> + if (SizedMemoryCode) { >>> + SizeEmitter sz(LabelLocations); >>> + DE->EmitDwarfTable(F,...

...gt;>>> TheJIT->updateGlobalMapping(F.getFunction(), CurBufferPtr); >>>> >>>> MBBLocations.clear(); >>>> @@ -579,12 +614,18 @@ >>>> DOUT << "Disassembled code:\n" >>>> << sys::disassembleBuffer(FnStart, FnEnd-FnStart, >>>> (uintptr_t)FnStart); >>>> #endif >>>> + >>>> if (ExceptionHandling) { >>>> uintptr_t ActualSize; >>>> + if (SizedMemoryCode) { >>>> + SizeEmitter sz(LabelLocations); >>>>...

...balMapping(F.getFunction(), CurBufferPtr); >>>>>> >>>>>> MBBLocations.clear(); >>>>>> @@ -579,12 +614,18 @@ >>>>>> DOUT << "Disassembled code:\n" >>>>>> << sys::disassembleBuffer(FnStart, FnEnd-FnStart, >>>>>> (uintptr_t)FnStart); >>>>>> #endif >>>>>> + >>>>>> if (ExceptionHandling) { >>>>>> uintptr_t ActualSize; >>>>>> + if (SizedMemoryCode) { >>>>>> +...

...nction(), CurBufferPtr); >>>>>>> >>>>>>> MBBLocations.clear(); >>>>>>> @@ -579,12 +614,18 @@ >>>>>>> DOUT << "Disassembled code:\n" >>>>>>> << sys::disassembleBuffer(FnStart, FnEnd-FnStart, >>>>>>> (uintptr_t)FnStart); >>>>>>> #endif >>>>>>> + >>>>>>> if (ExceptionHandling) { >>>>>>> uintptr_t ActualSize; >>>>>>> + if (SizedMemoryCode) { &gt...

...TheJIT->updateGlobalMapping(F.getFunction(), CurBufferPtr); >>>>> >>>>> MBBLocations.clear(); >>>>> @@ -579,12 +614,18 @@ >>>>> DOUT << "Disassembled code:\n" >>>>> << sys::disassembleBuffer(FnStart, FnEnd-FnStart, >>>>> (uintptr_t)FnStart); >>>>> #endif >>>>> + >>>>> if (ExceptionHandling) { >>>>> uintptr_t ActualSize; >>>>> + if (SizedMemoryCode) { >>>>> + SizeEmitter sz(LabelLo...

...tr); >>>>>>>> >>>>>>>> MBBLocations.clear(); >>>>>>>> @@ -579,12 +614,18 @@ >>>>>>>> DOUT << "Disassembled code:\n" >>>>>>>> << sys::disassembleBuffer(FnStart, FnEnd-FnStart, >>>>>>>> (uintptr_t)FnStart); >>>>>>>> #endif >>>>>>>> + >>>>>>>> if (ExceptionHandling) { >>>>>>>> uintptr_t ActualSize; >>>>>>>> + if...

...------------ ~/clang -target armv7-none-eabi -O0 -c -emit-llvm lolwut.c -o lolwut.bc ~/llc -O0 lolwut.bc -o lolwut.s ---- lolwut.s ---------------------------- .file "lolwut.bc" .text .globl lolwut .align 2 .type lolwut,%function lolwut: @ @lolwut .fnstart @ BB#0: @ %entry @APP ldr r1, .Ltmp0 .align 2 .Ltmp0: .long ".L11" ".L11": @NO_APP bx lr .Ltmp1: .size lolwut, .Ltmp1-lolwut ------------------------------------------ Somehow, the forward referenced label at 1: in the original assembly...

...gt;>>>>> >>>>>>>>> MBBLocations.clear(); >>>>>>>>> @@ -579,12 +614,18 @@ >>>>>>>>> DOUT << "Disassembled code:\n" >>>>>>>>> << sys::disassembleBuffer(FnStart, FnEnd-FnStart, >>>>>>>>> (uintptr_t)FnStart); >>>>>>>>> #endif >>>>>>>>> + >>>>>>>>> if (ExceptionHandling) { >>>>>>>>> uintptr_t ActualSize; >>>>>&...

...bute 21, 1 @ Tag_ABI_FP_exceptions .eabi_attribute 23, 3 @ Tag_ABI_FP_number_model .eabi_attribute 24, 1 @ Tag_ABI_align_needed .eabi_attribute 25, 1 @ Tag_ABI_align_preserved .file "simple-fadd.ll" .globl fadd .align 2 .type fadd,%function fadd: @ @fadd .fnstart .Leh_func_begin0: @ BB#0: push {lr} bl __addsf3 pop {lr} mov pc, lr .Ltmp0: .size fadd, .Ltmp0-fadd .Leh_func_end0: .fnend .ident "Ubuntu clang version 3.6.0-2ubuntu1~trusty1 (tags/RELEASE_360/final) (based on LLVM 3.6.0)" One can clearly see a bl __addsf3 instruction. However for some...

Thx again Evan for the review. Here's a new patch for the JIT in itself. The major changes are: 1) A JITMemoryManager now has a flag saying "I require to know the size of what you want to emit" 2) DwarfJITEmitter is augmented with GetSize* functions 3) JITEmitter::startFunction checks if the JITMemoryManager requires to know the size. If so, it computes it and gives it through the

...ceptionTable(F.getFunction(), - ActualSize); - BufferEnd = BufferBegin+ActualSize; - EmittedFunctions[F.getFunction()].ExceptionTable = BufferBegin; - uint8_t *EhStart; - uint8_t *FrameRegister = DE->EmitDwarfTable(F, *this, FnStart, FnEnd, - EhStart); + while (true) { + BufferBegin = CurBufferPtr = MemMgr->startExceptionTable(F.getFunction(), + ActualSize); + BufferEnd = BufferBegin+ActualSize; + Em...