Allows returning a PPC::Predicate from a function with a no-predicate
value possible. Preparatory patch for fast-isel on PPC64 ELF. No
behavioral change intended.
llvm-svn: 183841
I've been comparing the object file output of LLVM's integrated
assembler against the external assembler on PowerPC, and one
area where differences still remain are in DWARF sections.
In particular, the GNU assembler generates .debug_frame and
.debug_line sections using a code alignment factor of 4, since
all PowerPC instructions have size 4 and must be aligned to a
multiple of 4. However, current MC code hard-codes a code
alignment factor of 1.
This patch changes this by adding a "minimum instruction alignment"
data element to MCAsmInfo and using this as code alignment factor.
This requires passing a MCContext into MCDwarfLineAddr::Encode
and MCDwarfLineAddr::EncodeAdvanceLoc. Note that one caller,
MCDwarfLineAddr::Write, didn't actually have that information
available. However, it turns out that this routine is in fact
never used in the whole code base, so the patch simply removes
it. If it turns out to be needed again at a later time, it
could be re-added with an updated interface.
llvm-svn: 183834
`typeinfo for llvm:🆑:GenericOptionValue').
Remove an "anchor" method for an abstract class. (This does not
increase the number of vtables.)
llvm-svn: 183830
A couple of old test cases in test/MC/PowerPC were still using
LLVM IR. Now that we have a working assembler, we can move
them to assembler tests instead:
ppc64-initial-cfa.ll
ppc64-relocs-01.ll
ppc64-tls-relocs-01.ll
llvm-svn: 183829
This test case was a "sanity check"/"breathing" test case at first, but
is really fragile, which impairs changes to yaml2obj.
`test/Object/yaml2obj-elf-bits-endian.test` is much more robust and
serves as an adequate sanity check.
llvm-svn: 183811
The pass emits a call to sqrt that has attribute "read-none". This call will be
converted to an ISD::FSQRT node during DAG construction, which will turn into
a mips native sqrt instruction.
llvm-svn: 183802
Sign- and zero-extension folding was slightly incorrect because it wasn't checking that the shift on extensions was zero. Further, I recently added AND rd, rn, #255 as a form of 8-bit zero extension, and failed to add the folding code for it.
This patch fixes both issues.
This patch fixes both, and the test should remain the same:
test/CodeGen/ARM/fast-isel-fold.ll
llvm-svn: 183794
For ARM on linux we use /proc/cpuinfo to detect the host CPU's features.
Linux derives these values without ever looking at the vendor of the
specific CPU implementation. Hence, it adds little value, if we parse
the output of /proc/cpuinfo only for certain vendors.
This patch enables us to derive the correct feature flags e.g. for Qualcomm
CPUs.
llvm-svn: 183790
COFF header is always present both in executable and in object file. PE header
is present only in executable. So the natural way to handle PE/COFF file is
treating COFF is mandatory header and PE is optional. Current data structre
does not allow it, because PE header includes COFF header. Removing COFF
header will simplify the code to handle PE/COFF files.
Reviewers: Bigcheese
CC: llvm-commits
Differential Revision: http://llvm-reviews.chandlerc.com/D952
llvm-svn: 183788
Instead of a custom implementation of replaceAllUsesWith, we just call
replaceAllUsesWith and recreate llvm.used and llvm.compiler-used.
This change is particularity interesting because it makes llvm see
through what clang is doing with static used functions in extern "C"
contexts. With this change, running clang -O2 in
extern "C" {
__attribute__((used)) static void foo() {}
}
produces
@llvm.used = appending global [1 x i8*] [i8* bitcast (void ()* @foo to
i8*)], section "llvm.metadata"
define internal void @foo() #0 {
entry:
ret void
}
llvm-svn: 183756
It will be tested in the next commit which moves another user to identify_magic.
Original message:
Fix an out of bounds array access.
We were looking at Magic[5] without checking Length. Since this path would not
return unless Length >= 18 anyway, just move the >= 18 check up.
llvm-svn: 183753
