Also, use SCEV to determine the trip count of the loop, which is more powerful
and accurate that Loop::getTripCount.

llvm-svn: 51179

llvm-svn: 51176

llvm-svn: 51172

test/Verifier/2002-11-05-GetelementptrPointers.ll, which was incorrect.
Instead, fix getIndexedType to not follow pointer types, as
PointerType is a subclass of CompositeType.

llvm-svn: 51171

use-before-def. The problem comes up in code with multiple PHIs where
one PHI is being rewritten in terms of the other, but the other needs
to be casted first. LLVM rules requre the cast instruction to be
inserted after any PHI instructions, but when instructions were
inserted to replace the second PHI value with a function of the first,
they were ended up going before the cast instruction. Avoid this
problem by remembering the location of the cast instruction, when one
is needed, and inserting the expansion of the new value after it.

This fixes a bug that surfaced in 255.vortex on x86-64 when
instcombine was removed from the middle of the loop optimization
passes. 

llvm-svn: 51169

llvm-svn: 51165

This changes the .bc file format, but if I understand
how it works correctly, old .bc files continue to
be readable.

llvm-svn: 51161

something with a v1 type.

llvm-svn: 51160

moving toward making structs and arrays first-class types.

llvm-svn: 51157

llvm-svn: 51156

Patch by Matthijs Kooijman.

llvm-svn: 51154

llvm-svn: 51152

compiling with gcc 4.3.

llvm-svn: 51145

Fix a bunch of 80col violations that arose from the Create API change. Tweak makefile targets to find these better.

llvm-svn: 51143

Make use of vector load and store operations to implement memcpy, memmove, and memset. Currently only X86 target is taking advantage of these.

llvm-svn: 51140

operator new() referring to the static initTags function, which has to be in the 
same linkage unit as any file including User.h.

llvm-svn: 51136

to 64 bits.

llvm-svn: 51135

is bitcast to return a floating point value. The result of the instruction may
not be used by the program afterwards, and LLVM will happily remove all
instructions except the call. But, on some platforms, if a value is returned as
a floating point, it may need to be removed from the stack (like x87). Thus, we
can't get rid of the bitcast even if there isn't a use of the value.

llvm-svn: 51134

conversion.  Try 0x1.0000a4p+0f.  Neil, please review.

llvm-svn: 51132

llvm-svn: 51131

llvm-svn: 51130

llvm-svn: 51129

llvm-svn: 51126

llvm-svn: 51123

llvm-svn: 51120

llvm-svn: 51119

are represented as "weak", but there are subtle differences
in some cases on Darwin, so we need both.  The intent
is that "common" will behave identically to "weak" unless
somebody changes their target to do something else.
No functional change as yet.

llvm-svn: 51118

llvm-svn: 51115

Patch by Matthijs Kooijman!

llvm-svn: 51114

SETOEQ, is it does with (SETEQ & SETULE), map it to SETEQ.

llvm-svn: 51112

Changed cout to DOUT, and TODOs to FIXMEs.
Other changes as per coding conventions.

llvm-svn: 51105

to make the Cpp backend output compilable.

llvm-svn: 51095

llvm-svn: 51094

llvm-svn: 51092

This eliminates the need for several awkward casts, including
the last dynamic_cast under lib/Target.

llvm-svn: 51091

llvm-svn: 51089

llvm-svn: 51088

Patch by Matthijs Kooijman!

llvm-svn: 51083

bug as well as a missed optimization.  We weren't properly checking for local
dependencies before moving on to non-local ones when doing non-local read-only 
call CSE.

llvm-svn: 51082

Do not rely on std::swap<Use>, provide a (faster) member function instead.
This change is primarily necessitated by MSVC++'s incompatibility with
declaring std::swap<Use> to be a friend of Use.

Also contains some minor tweaks to Use inline functions,
to undo pointless changes that sneaked in with the last merge.

llvm-svn: 51078