correctly when unwind info is being generated.

llvm-svn: 49366

Corresponds to -fno-unwind-tables (usually default in gcc).

llvm-svn: 49361

review feedback from Chris quite a while ago. No functionality
change.

llvm-svn: 49348

by Dan Gohman is fixed.

llvm-svn: 49330

Specifically, introduction of XXX::Create methods
for Users that have a potentially variable number of
Uses.

llvm-svn: 49277

llvm-svn: 49244

llvm-svn: 49218

llvm-svn: 49158

Fix x86-64 encoding bug. REX prefix must always follow 0x0F prefix. For example, extractps in 64bit mode: 66 REX 0F 3A 17, not 66 0F 3A REX 17.

llvm-svn: 49157

llvm-svn: 49156

llvm-svn: 49129

llvm-svn: 49124

it causes compile errors.

llvm-svn: 49122

now that llvm-gcc is lowering appropriately-sized struct returns
to i128 on x86-64.

llvm-svn: 49109

llvm-svn: 49096

when some another register is used for argument passing.
Currently is used on Win64.

llvm-svn: 49079

review feedback.
-enable-eh is still accepted but doesn't do anything.
EH intrinsics use Dwarf EH if the target supports that,
and are handled by LowerInvoke otherwise.
The separation of the EH table and frame move data is,
I think, logically figured out, but either one still
causes full EH info to be generated (not sure how to
split the metadata correctly).
MachineModuleInfo::needsFrameInfo is no longer used and
is removed.

llvm-svn: 49064

ReMat of load from stub in pic mode extends the life of pic base. Currently spiller doesn't do a good job of estimating the impact. Disable for now.

llvm-svn: 49059

llvm-svn: 49054

llvm-svn: 49050

llvm-svn: 49048

llvm-svn: 49046

llvm-svn: 49037

llvm-svn: 49012

llvm-svn: 49011

not marked nounwind, or for all functions when -enable-eh
is set, provided the target supports Dwarf EH.

llvm-gcc generates nounwind in the right places; other FEs
will need to do so also.  Given such a FE, -enable-eh should
no longer be needed.

llvm-svn: 49006

llvm-svn: 49002

llvm-svn: 48995

llvm-svn: 48977

llvm-svn: 48965

patch by David Chisnall.

llvm-svn: 48963

load value. This fixes PR2177.

llvm-svn: 48932

llvm-svn: 48922

llvm-svn: 48912

llvm-svn: 48911

llvm-svn: 48856

llvm-svn: 48855

llvm-svn: 48854

LLVM Value/Use does and MachineRegisterInfo/MachineOperand does.
This allows constant time for all uses list maintenance operations.

The idea was suggested by Chris. Reviewed by Evan and Dan.
Patch is tested and approved by Dan.

On normal use-cases compilation speed is not affected. On very big basic
blocks there are compilation speedups in the range of 15-20% or even better. 

llvm-svn: 48822

llvm-svn: 48815