llvm-svn: 73342

is that, for functions whose bodies are entirely guarded by an if-statement, it
can be profitable to pull the test out of the callee and into the caller.

This code has had some cursory testing, but still has a number of known issues
on the LLVM test suite.

llvm-svn: 73338

Introduce new BinaryObject (blob) class, ELF Writer modified to use it. BinaryObject.h by Aaron Gray

llvm-svn: 73333

pointer. This fixes kimwitu++. Pointed out by Frits van Bommel on review!

llvm-svn: 73299

The subprogram descriptor for a function may be missing (llvm-ld linking two static functions with same name), so pick up the compilation unit for the function from the first valid debug loc of its instructions.
This patch also emits debug info for structure (aggregate types in 
general) types.

llvm-svn: 73295

induction variable when the addrec to be expanded does not require
a wider type. This eliminates the need for IndVarSimplify to
micro-manage SCEV expansions, because SCEVExpander now
automatically expands them in the form that IndVarSimplify considers
to be canonical. (LSR still micro-manages its SCEV expansions,
because it's optimizing for the target, rather than for
other optimizations.)

Also, this uses the new getAnyExtendExpr, which has more clever
expression simplification logic than the IndVarSimplify code it
replaces, and this cleans up some ugly expansions in code such as
the included masked-iv.ll testcase.

llvm-svn: 73294

extension with unspecified bits.

llvm-svn: 73293

consecutive addresses togther. This makes it easier for the post-allocation pass
to form ldm / stm.

This is step 1. We are still missing a lot of ldm / stm opportunities because
of register allocation are not done in the desired order. More enhancements
coming.

llvm-svn: 73291

llvm.dbg.region.end() intrinsic is not required to be in _last_ basic block in a function.  If that happens then any basic block that follows (lexically) the block with regin.end will not have scope info available.  LexicalScopeStack relies on processing basic block in CFG order, but this processing order is not guaranteed. Things get complicated when the optimizer gets a chance to optimizer IR with dbg intrinsics. 
Apply defensive patch to preserve at least one lexical scope till the end of function.

llvm-svn: 73282

llvm-svn: 73258

llvm-svn: 73257

llvm-svn: 73256

If killed register is defined by implicit_def, do not clear it since it's live range may overlap another def of same register.

llvm-svn: 73255

non-default addrspaces.

llvm-svn: 73253

llvm-svn: 73252

llvm-svn: 73244

it may round differently. This fixes PR4374.

llvm-svn: 73243

the relationship with MergeFunctions.cpp's isEquivalentOperation,
and make a trivial code reordering so that the two functions are
easier to compare.

Fix the name of Instruction::isSameOperationAs in MergeFunction.cpp's
isEquivalentOperation's comment, and fix a nearby 80-column violation.

llvm-svn: 73241

llvm-svn: 73235

out of sync with regular cc.

The only difference between the tail call cc and the normal
cc was that one parameter register - R9 - was reserved for
calling functions through a function pointer. After time the
tail call cc has gotten out of sync with the regular cc. 

We can use R11 which is also caller saved but not used as
parameter register for potential function pointers and
remove the special tail call cc on x86-64.

llvm-svn: 73233

llvm-svn: 73231

thunks.

llvm-svn: 73230

another thread.

llvm-svn: 73227

points to while analyzing all other fields.

Use FoldingSetNodeID to produce a good hash. This dramatically decreases run
times.

Emit thunks. This means that it can look at all functions regardless of what
the linkage is or if the address is taken, but unfortunately some small
functions can be even shorter than the thunk because our backend doesn't yet
realize it can just turn these into jumps. This means that this pass will
pessimize code on average.

llvm-svn: 73222

since functions may contain aggregate constants too.

llvm-svn: 73220

add a few suggestions from looking at some assembly code.

llvm-svn: 73210

llvm-svn: 73209

Emission for globals, using the correct data sections
Function alignment can be computed for each target using TargetELFWriterInfo
Some small fixes

llvm-svn: 73201

turned into unreachable.

llvm-svn: 73195

llvm-svn: 73194

llvm-svn: 73188

by cppcheck.

llvm-svn: 73187

llvm-svn: 73185

llvm-svn: 73184

llvm-svn: 73174

llvm-svn: 73164

llvm-svn: 73156

llvm-svn: 73152

identical function ConstantIsDead() to SafeToDestroyConstant(), to
emphasise the connection with Constant::destroyConstant().

llvm-svn: 73149

change.

llvm-svn: 73143