This is considered a workaround. The problem is some targets are not modeling side effects correctly. PPC is apparently one of those. This patch allows ppc llvm-gcc to bootstrap on Darwin. Once we find out which instruction definitions are wrong, we can remove the PPCInstrInfo workaround.
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Constant::getRelocationInfo(), which has a much simpler
to use API. It still should not be part of libvmcore, but
is better than it was. Also teach it to be smart about
hidden visibility.
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range's weight properly. This is turned off right now in the sense that
you'll get an assert if you get into a situation that can only be caused
by an iterative coalescer. All other code paths operate exactly as
before so there is no functional change with this patch. The asserts
should be disabled if/when an iterative coalescer gets added to trunk.
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pool entry will require relocations against it. I implemented this
conservatively for ARM, someone who is knowledgable about it should
see if this can be improved.
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their appropriate sections before the code itself. They need to be emitted
before the function because on some targets (x86 but not x86_64) the later
may reference a JT or CP entry address
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(x pred y) with more thorough code that does more complete canonicalization
before resorting to range checks. This helps it find more cases where
the canonicalized expressions match.
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depends on XS1A, but I think the ReadOnlySection is already set up for this
and there is no testcase that this breaks. If this is really needed, we can
add the appropriate parameterization to TargetAsmInfo in the future to support
this.
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to twist your brain to see it, I believe it is the same as ELFTargetAsmInfo::SelectSectionForGlobal.
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the generic ELF version instead. This will result in its mergable constant
sections getting named ".rodata.cst4" instead of ".cp.const4", but the
linker looks at the section flags, not the name of the section AFAICT.
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as 32-bit code by default, and if gcc defaults to 64-bit code then ocamlc
requires a -cc "gcc -arch i386" option. We were hardcoding -cc g++
and throwing away any other compiler options that were determined when
ocamlc was configured and built.
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be useful, and it's currently unused. (Some issues: it isn't actually
rich enough to capture the semantics on many architectures, and
semantics can vary depending on the type being shifted.)
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printers to do neat and wonderful things when printing debug
information. The ideas is to allow passes to configer printers to emit
pass-specific information when dumping IR.
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