Use MachineFrameInfo.getPristineRegs() to determine which callee-saved registers are available for anti-dependency breaking. Some cleanup.

llvm-svn: 83208

llvm-svn: 83207

by a capital letter, which invokes undefined behavior.

llvm-svn: 83206

Teach CMake to look for bidirectional_iterator, iterator, forward_iterator, uint64_t, and u_int64_t, from Yonggang Luo

llvm-svn: 83203

operands of instructions with these properties while breaking anti-dep.

llvm-svn: 83198

ld / st pairs, etc.

llvm-svn: 83197

set, these flags indicate the instructions source / def operands have special
register allocation requirement that are not captured in their register classes.
Post-allocation passes (e.g. post-alloc scheduler) should not change their
allocations. e.g. ARM::LDRD require the two definitions to be allocated
even / odd register pair.

llvm-svn: 83196

llvm-svn: 83194

Ok'd by Owen.

llvm-svn: 83193

llvm-svn: 83192

Change ld/st multiples to explicitly model the writeback to base register. This fixes most of the -ldstopti-before-sched2 regressions.

llvm-svn: 83191

llvm-svn: 83190

If location info is attached with an instruction then keep track of alloca slots used by a variable. This info will be used by AsmPrinter to emit debug info for variables.

llvm-svn: 83189

This will allow processDebugLoc() to handle scopes for DWARF debug info. 

llvm-svn: 83183

llvm-svn: 83182

llvm-svn: 83181

llvm-svn: 83180

Add a new TargetLoweringObjectFileMachO::getConstTextCoalSection method to
get access to that section.

llvm-svn: 83178

to emit target-specific things at the beginning of the asm output.  This
fixes a problem for PPC, where the text sections are not being kept together
as expected.  The base class doInitialization code calls DW->BeginModule()
which emits a bunch of DWARF section directives.  The PPC doInitialization
code then emits all the TEXT section directives, with the intention that they
will be kept together. But as I understand it, the Darwin assembler treats
the default TEXT section as a special case and moves it to the beginning of
the file, which means that all those DWARF sections are in the middle of
the text.  With this change, the EmitStartOfAsmFile hook is called before
the DWARF section directives are emitted, so that all the PPC text section
directives come out right at the beginning of the file.

llvm-svn: 83176

llvm-svn: 83174

llvm-svn: 83172

llvm-svn: 83171

for derived AsmPrinters to add another one.  In some cases, fixing this
removes the need to override the doInitialization method.

llvm-svn: 83170

llvm-svn: 83168

while calling changeImmediateDominator, which removes elements from the
vector. This fixes PR5097.

llvm-svn: 83166

llvm-svn: 83164

llvm-svn: 83163

llvm-svn: 83160

basic blocks that are so long that their size overflows a short.

Also assert that overflow does not happen in the future, as requested by Evan.

This fixes PR4401.

llvm-svn: 83159

llvm-svn: 83151

llvm-svn: 83148

llvm-svn: 83145

llvm-svn: 83144

llvm-svn: 83143

llvm-svn: 83142

By the way, this code is buggy. You can't keep a map<MDNode *, something>
because the MDNode may be destroyed and reused for something else.

llvm-svn: 83141

per customary usage

llvm-svn: 83137

the size of the saved frame pointer needs to be taken into account.

llvm-svn: 83136

Patch by Sylvere Teissier.

llvm-svn: 83135

llvm-svn: 83132