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: 73271

of the target's pointer size. This avoids the need for -m32 on
the llvm-gcc command-line, which some targets may not support.

llvm-svn: 73270

on systems which default to a 64-bit target.

llvm-svn: 73265

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

Document noredzone and noimplicitfloat function attributes.

llvm-svn: 73246

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: 73239

llvm-svn: 73236

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

Patch by Edward O'Callaghan.

llvm-svn: 73228

another thread.

llvm-svn: 73227

either one call the other since either one can be replaced at link time, and
they need to be independent.

llvm-svn: 73225

Patch by Edward O'Callaghan.

llvm-svn: 73224

llvm-svn: 73223

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

llvm-svn: 73221

since functions may contain aggregate constants too.

llvm-svn: 73220

against the target triple, instead of equivalent to "XFAIL: *".

llvm-svn: 73219

Patch by Ingmar Vanhassel!

llvm-svn: 73216

not found.

llvm-svn: 73213

CodeSourcery's provided GCC-based crosstools, from which we use binutils.

llvm-svn: 73212

XFAIL this on PPC Linux. This keeps showing up in the buildbot and isn't easy to fix, and I'd like it to stop masking 
real failures.

llvm-svn: 73211

add a few suggestions from looking at some assembly code.

llvm-svn: 73210

llvm-svn: 73209

llvm-svn: 73206

llvm-svn: 73203

llvm-svn: 73202

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