llvm-svn: 137865

llvm-svn: 137864

instruction should be marked as potentially reading and/or writing memory.

llvm-svn: 137863

llvm-svn: 137861

llvm-svn: 137857

llvm-svn: 137856

Things are much saner now. We no longer need to modify the laning pads, because
of the invariants we impose upon them. The only thing DwarfEHPrepare needs to do
is convert the 'resume' instruction into a call to '_Unwind_Resume'.

llvm-svn: 137855

llvm-svn: 137854

Revert r137781; I agree with Duncan's comment that the situation in question is clearly impossible given the current structure of the code.

llvm-svn: 137853

llvm-svn: 137848

llvm-svn: 137847

llvm-svn: 137846

llvm-svn: 137845

llvm-svn: 137844

llvm-svn: 137843

Don't use NULL to represent an invalid library; Cygwin uses this for RTLD_DEFAULT. Caught by Takumi.

llvm-svn: 137841

llvm-svn: 137840

llvm-svn: 137838

Silly mistake from r137777; restore significant isStructTy() checks.  While here, be a bit more defensive
with unknown instructions.

Fixes PR10687.

llvm-svn: 137836

llvm-svn: 137833

llvm-svn: 137832

llvm-svn: 137831

Allow the MCDisassembler to return a "soft fail" status code, indicating an instruction that is disassemblable, but invalid.  Only used for ARM UNPREDICTABLE instructions at the moment.
Patch by James Molloy.

llvm-svn: 137830

match splats in the form (splat (scalar_to_vector (load ...))) whenever
the load can be folded. All the logic and instruction emission is
working but because of PR8156, there are no ways to match loads, cause
they can never be folded for splats. Thus, the tests are XFAILed, but
I've tested and exercised all the logic using a relaxed version for
checking the foldable loads, as if the bug was already fixed. This
should work out of the box once PR8156 gets fixed since MayFoldLoad will
work as expected.

llvm-svn: 137810

llvm-svn: 137809

llvm-svn: 137808

vinsertf128 $1 + vpermilps $0, remove the old code that used to first
do the splat in a 128-bit vector and then insert it into a larger one.
This is better because the handling code gets simpler and also makes a
better room for the upcoming vbroadcast!

llvm-svn: 137807

llvm-svn: 137806

llvm-svn: 137804

(void)static_func; it is used as idiom in llvm source tree to suppress "Unused static function" warnings.

llvm-svn: 137800

llvm-svn: 137798

Use DynamicLibrary instances as a way to get symbols from a specific library. Preparation for upcoming (preliminary) support for plugins for the static analyzer.

llvm-svn: 137791

llvm-svn: 137788

Separate out Thumb1 instructions that need an S bit operand from those that do not, for the purposes of decoding them.

llvm-svn: 137787

llvm-svn: 137786

Extend the undef ^ undef idiom once more.  No testcase: I can't figure out how to actually trigger the codepath in question at the moment, but it might get exposed in the future.

llvm-svn: 137781

llvm-svn: 137779

Until now all debug info MDNodes referred to a root MDNode, a compile unit. This simplified handling of these needs in dwarf writer.  However, one side effect of this is that during link time optimization all these MDNodes are _not_ uniqued. In other words there will be N number of MDNodes describing "int", "char" and all other types, which would suddenly grow when each object file starts using libraries like STL.

MDNodes graph structure such that compiler unit keeps track of important MDNodes and update dwarf writer to process mdnodes top-down instead of bottom up.

llvm-svn: 137778

making random bad assumptions about instructions which are not explicitly listed.  

Includes fix for rdar://9956541, a version of "undef ^ undef should return
0 because it's easier than arguing with users".

llvm-svn: 137777

llvm-svn: 137775