Patch by Sterling Stein!

llvm-svn: 41758

Constify to catch bugs.

llvm-svn: 41751

Use APFloat in UpgradeParser and AsmParser.
Change all references to ConstantFP to use the
APFloat interface rather than double.  Remove
the ConstantFP double interfaces.
Use APFloat functions for constant folding arithmetic
and comparisons.
(There are still way too many places APFloat is
just a wrapper around host float/double, but we're
getting there.)

llvm-svn: 41747

Also, fix a case, when target doesn't have weak symbols supported.

llvm-svn: 41746

Add instruction dump output.  This helps find bugs.

llvm-svn: 41744

Pluggable coalescers inplementation.

llvm-svn: 41743

llvm-svn: 41741

that would make the icmp true. Fixes PR1637.

llvm-svn: 41740

llvm-svn: 41739

leal    (,%rcx,8), %rcx
It should be
leal    (,%rcx,8), %ecx

llvm-svn: 41735

llvm-svn: 41733

Use pool allocator for all the VNInfo's to improve memory access locality. This reduces coalescing time on siod Mac OS X PPC by 35%. Also remove the back ptr from VNInfo to LiveInterval and other tweaks.

llvm-svn: 41729

Added Reset() to free all allocated memory regions and reset state to be the same as right after ctor.

llvm-svn: 41728

llvm-svn: 41727

native types to handle denormals correctly.

llvm-svn: 41726

llvm-svn: 41725

Added default parameters to GetElementPtrInstr constructor call.  Visual Studio 2k5 was getting confused and was unable to compile it.  Suspected compiler error.

llvm-svn: 41721

may be the same as the first label for the following
invoke.  Remove a micro-optimization which was wrong
in this case.

llvm-svn: 41720

labels are generated bracketing each call (not just
invokes).  This is used to generate entries in
the exception table required by the C++ personality.
However it gets in the way of tail-merging.  This
patch solves the problem by no longer placing labels
around ordinary calls.  Instead we generate entries
in the exception table that cover every instruction
in the function that wasn't covered by an invoke
range (the range given by the labels around the invoke).
As an optimization, such entries are only generated for
parts of the function that contain a call, since for
the moment those are the only instructions that can
throw an exception [1].  As a happy consequence, we
now get a smaller exception table, since the same
region can cover many calls.  While there, I also
implemented folding of invoke ranges - successive
ranges are merged when safe to do so.  Finally, if
a selector contains only a cleanup, there's a special
shorthand for it - place a 0 in the call-site entry.
I implemented this while there.  As a result, the
exception table output (excluding filters) is now
optimal - it cannot be made smaller [2].  The
problem with throw filters is that folding them
optimally is hard, and the benefit of folding them is
minimal.

[1] I tested that having trapping instructions (eg
divide by zero) in such a region doesn't cause trouble.
[2] It could be made smaller with the help of higher
layers, eg by having branch folding reorder basic blocks
ending in invokes with the same landing pad so they
follow each other.  I don't know if this is worth doing.

llvm-svn: 41718

llvm-svn: 41717

llvm-svn: 41713

llvm-svn: 41712

llvm-svn: 41711

Update generated files.

llvm-svn: 41706

llvm-svn: 41700

Update GEP constructors to use an iterator interface to fix
GLIBCXX_DEBUG issues.

llvm-svn: 41697

llvm-svn: 41680

llvm-svn: 41676

Emit proper "secrel" directive, where possible. This fixes invalid asm syntax of debug info on mingw32. Also, cleanup 
some stuff.

llvm-svn: 41675

llvm-svn: 41669

llvm-svn: 41668

llvm-svn: 41665

Implement some constant folding in SelectionDAG and
DAGCombiner using APFloat.  Remove double versions
of constructor and getValue from ConstantFPSDNode.

llvm-svn: 41664

llvm-svn: 41650

llvm-svn: 41645

llvm-svn: 41643

This is mandated table 3.1 at
http://www.x86-64.org/documentation/abi.pdf

llvm-svn: 41642

llvm-svn: 41641

Use std::map instead of a (potentially very sparse) array to track val# defined by copy from the other live range. Minor compile time win when number of val# is large.

llvm-svn: 41640

Use APFloat interfaces for more references, mostly
of ConstantFPSDNode.

llvm-svn: 41632