Previously, yaml2coff.cpp had a writeHexData static helper function to
do this, but it is generally useful functionality.
Also, validate hex strings up-front to avoid running having to handle
errors "deep inside" the yaml2obj code (it also gives better diagnostics
than it used to).
llvm-svn: 183345
The first symbol on ELF is dummy, but it has a defined content and readelf
normally displays it. With this change llvm-readobj also displays it and we
can check that llvm-mc output is correct according to the standard.
llvm-svn: 183337
See the comment in yaml2obj.cpp for why this is currently needed.
Eventually we can get rid of this, but for now it is needed in order to
make forward progress with adding ELF support, and should be
straightforward to remove later.
Also, preserve the default of COFF, to avoid breaking existing tests.
This policy can easily be changed later though.
llvm-svn: 183332
Add earlyclobber constaints to prevent input register being allocated as
the output register because, according to Intel spec [1], "If any pair
of the index, mask, or destination registers are the same, this
instruction results a UD fault."
---
[1] http://software.intel.com/sites/default/files/319433-014.pdf
llvm-svn: 183327
With this patch we use the SectionIndex directly, instead of counting the
number of symbol tables. This saves a DenseMap lookup every time we want to
find which symbol a relocation refers to.
Also simplify based on the fact that there is at most one SHT_SYMTAB and one
SHT_DYNSYM.
llvm-svn: 183326
Add some generic SchedWrites and assign resources for Swift and Cortex A9.
Reapply of r183257. (Removed empty InstRW for division on swift)
llvm-svn: 183319
An instruction with less than 3 inputs is trivially a fast immediate shift.
Reapply of 183256, should not have caused the tablegen segfault on linux either.
llvm-svn: 183314
Don't output data if we are supposed to ignore the record.
Reapply of 183255, I don't think this was causing the tablegen segfault on linux
testers.
llvm-svn: 183311
This fixes some of the ridiculously complex code for optimizing the
machine model tables that are shared among all processors of a given
target. A9 and Swift both use the "special" feature that maps old
itinerary classes to new machine model defs. They map different
overlapping subsets of instructions, which wasn't handled correctly.
llvm-svn: 183302
When a function is inlined we lazily construct the variables
representing the function's parameters. After that, we add any remaining
unused parameters.
If the function doesn't use all the parameters, or uses them out of
order, then the DWARF would produce them in that order, producing a
parameter order that doesn't match the source.
This fix causes us to always keep the arg variables at the start of the
variable list & in the original order from the source.
llvm-svn: 183297
In ELF (as in MachO), not all relocations point to symbols. Represent this
properly by using a symbol_iterator instead of a SymbolRef. Update llvm-readobj
ELF's dumper to handle relocatios without symbols.
llvm-svn: 183284
Sean Silva