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Here's a first attempt at a MDBuilder class that makes it easier to create metadata. It has utilities for creating range and tbaa metadata (which by a strange coincidence are the kinds used by dragonegg). Ciao, Duncan. -------------- next part -------------- A non-text attachment was scrubbed... Name: mdbuilder.diff Type: text/x-patc...

On Sun, Apr 15, 2012 at 3:35 PM, Duncan Sands <baldrick at free.fr> wrote: > Here's a first attempt at a MDBuilder class that makes it easier to create > metadata. It has utilities for creating range and tbaa metadata (which by > a strange coincidence are the kinds used by dragonegg). > This seems like a fine interface. I'd love it for folks more familiar w/ the particular metadata categories to...

Hi Duncan, I like the changes to IRBuilder and how the operator can't change it. Looks a lot safer (mistake-wise) and more convenient. This function won't to remove a previously set tag, which could be used by optimisations or inlining. + Instruction *AddFPMathTag(Instruction *I, MDNode *FPMathTag) const { + if (!FPMathTag) + FPMathTag = DefaultFPMathTag; + if (FPMathTag) +

...representing this as a single "fast" mode flag, it isn't a single flag, that's the whole point of using metadata. OK, right now there is only one option (the "accuracy"), true, but the intent is that others will be added, and the meaning of accuracy tightened, later. MDBuilder has a createFastFPMath method which is intended to produce settings that match GCC's -ffast-math, however frontends will be able to specify whatever settings they like if that doesn't suit them (i.e. createFPMath will get more arguments as more settings become available). Note that as the...

...FPMathOperator class can no longer be used to change math settings, only to read them. Currently it can be queried for accuracy info. I split the accuracy methods into two: one for 'fast' accuracy, one for a numerical accuracy (which returns +infty when the accuracy is 'fast'). - MDBuilder got support for creating fpmath metadata, in particular there is function that returns the appropriate settings for -ffast-math. - A default fpmath setting can be supplied to IRBuilder, which will then apply it to all floating point operations. It is also possible to specify specific fpmath metad...

Hi, I am encountering a problem that I do not know how to debug. I would greatly appreciate any guidance on this issue. On Windows when I run Lua test cases from JITed code I am getting following error: Unhandled exception at 0x00007FFCEEEAC500 (ntdll.dll) in lua.exe: 0xC0000028: An invalid or unaligned stack was encountered during an unwind operation. This is happening when the Lua code is

Duncan, I have some issues with representing this as a single "fast" mode flag, which mostly boil down to the fact that this is a very C-centric view of the world. And, since C compilers are not generally known for their awesomeness on issues of numerics, I'm not sure that's a good idea. Having something called a "fast" or "relaxed" mode implies that it is

The attached patch is a first attempt at representing "-ffast-math" at the IR level, in fact on individual floating point instructions (fadd, fsub etc). It is done using metadata. We already have a "fpmath" metadata type which can be used to signal that reduced precision is OK for a floating point operation, eg %z = fmul float %x, %y, !fpmath !0 ... !0 = metadata

...----------------------------------------------------------------===// + +#include "llvm/Analysis/BlockFrequencyInfo.h" +#include "llvm/Analysis/BranchProbabilityInfo.h" +#include "llvm/IR/Constants.h" +#include "llvm/IR/Instructions.h" +#include "llvm/IR/MDBuilder.h" +#include "llvm/IR/PassManager.h" +#include "llvm/Transforms/Instrumentation.h" + +#include <array> + +using namespace llvm; + +class CFGProfilePass : public ModulePass { +public: + static char ID; + + CFGProfilePass() : ModulePass(ID) { + initializeCFGProfile...

...or Release+Asserts build llvm[1]: Compiling IntrinsicInst.cpp for Release+Asserts build llvm[1]: Compiling LLVMContext.cpp for Release+Asserts build llvm[1]: Compiling LLVMContextImpl.cpp for Release+Asserts build llvm[1]: Compiling LegacyPassManager.cpp for Release+Asserts build llvm[1]: Compiling MDBuilder.cpp for Release+Asserts build llvm[1]: Compiling Mangler.cpp for Release+Asserts build llvm[1]: Compiling Metadata.cpp for Release+Asserts build llvm[1]: Compiling MetadataTracking.cpp for Release+Asserts build llvm[1]: Compiling Module.cpp for Release+Asserts build llvm[1]: Compiling Operator.cpp...