llvm-svn: 140164

No functionality change. The hook makes it explicit which patterns
require "special" handling. i.e. it self-documents tblgen
deficiencies. I plan to add verification in ExpandISelPseudos and
Thumb2SizeReduce to catch any missing hasPostISelHooks. Otherwise it's
too fragile.

llvm-svn: 140160

llvm-svn: 140158

llvm-svn: 140157

llvm-svn: 140156

llvm-svn: 140154

GCOVLines is always accessed through a StringMap where the key is FileName.

llvm-svn: 140151

There is no need to write a local utility routine to find subprogram info if the utility routine is already available in DebugInfo.

llvm-svn: 140145

llvm-svn: 140140

Modified ARMISelLowering::AdjustInstrPostInstrSelection to handle the
full gamut of CPSR defs/uses including instructins whose "optional"
cc_out operand is not really optional. This allowed removal of the
hasPostISelHook to simplify the .td files and make the implementation
more robust.
Fixes rdar://10137436: sqlite3 miscompile

llvm-svn: 140134

llvm-svn: 140133

llvm-svn: 140125

llvm-svn: 140122

llvm-svn: 140121

llvm-svn: 140119

llvm-svn: 140116

llvm-svn: 140111

llvm-svn: 140108

llvm-svn: 140106

llvm-svn: 140105

llvm-svn: 140104

llvm-svn: 140102

llvm-svn: 140099

llvm-svn: 140098

128-bit undef subvector insertion into a 256-bit vector

llvm-svn: 140097

llvm-svn: 140095

llvm-svn: 140094

llvm-svn: 140088

llvm-svn: 140085

extract the landing pad block. Otherwise, there will be a situation where the
invoke's unwind edge lands on a non-landing pad.

We also forbid the user from extracting the landing pad block by itself. Again,
this is not a valid transformation.

llvm-svn: 140083

llvm-svn: 140079

llvm-svn: 140078

Fix an infinite loop where a transform in InstCombiner::visitAnd claims a construct is changed when it is not.  (See included testcase.)

Patch by Xiaoyi Guo.

llvm-svn: 140072

PR10955 and PR10948.

llvm-svn: 140069

Patch by Arrowdodger.

llvm-svn: 140064

llvm-svn: 140050

llvm-svn: 140047

yet legal according to comments in LegalizeDAG.cpp:227. 

Memcpy nodes created for copying byval arguments are inserted before
CALLSEQ_START.

The two failing tests reported in PR10876 pass after applying this patch.  

llvm-svn: 140046

llvm-svn: 140043

Specify an additional fixed bit in the Thumb2 SSAT encoding to prevent the decoder from emitting gibberish for this invalid encoding.

llvm-svn: 140041