virtual registers possibly having multiple kills while still
being defined and killed in the same block. If LiveIntervals
is manually re-run after two-address lowering, it currently
does add extra kills to two-address instructions, but this
is considered a bug.

llvm-svn: 59194

special-purpose hook to a new pass. Also, add check to see if any
x87 virtual registers are used, to avoid doing any work in the
common case that no x87 code is needed.

llvm-svn: 59190

llvm-svn: 59170

LLVMSystem.

llvm-svn: 59159

llvm-svn: 59158

llvm-svn: 59150

the debug output, so that the updated liveness flags are
reflected in the debug output.

llvm-svn: 59147

coalescing as a separate pass rather than inside of
LiveIntervalAnalysis.

llvm-svn: 59146

no longer records a unique defining instruction, and virtual
registers may have multiple kills while still being defined
and killed in the same block.

llvm-svn: 59145

llvm-svn: 59143

llvm-svn: 59142

When constructing std::strings from C strings, we should check the input
value to be not NULL so that the std::string constructor does not
segfault.
Fixes #3047.

llvm-svn: 59131

llvm-svn: 59126

that it no longer handles non-power-of-two vectors.
However it previously only handled them sometimes,
depending on obscure numerical relationships between
the index and vector type.  For example, for a vector
of length 6, it would succeed if and only if the
index was an even multiple of 6.  I consider this
more confusing than useful.

llvm-svn: 59122

when the target does not support ADDC/SUBC.  This
fixes PR3044.

llvm-svn: 59120

llvm-svn: 59119

llvm-svn: 59117

llvm-svn: 59116

llvm-svn: 59109

llvm-svn: 59107

llvm-svn: 59106

llvm-svn: 59104

llvm-svn: 59102

Reenable test.

llvm-svn: 59101

llvm-svn: 59100

llvm-svn: 59098

Only the tools that are mentioned in the compilation graph definition
are now inserted by PopulateCompilationGraph(). This should cut down
plugin loading time a little.

llvm-svn: 59097

llvm-svn: 59096

llvm-svn: 59093

llvm-svn: 59092

llvm-svn: 59090

llvm-svn: 59088

llvm-svn: 59087

This lets several failing tests get farther along, but doesn't completely fix any of them.

llvm-svn: 59086

llvm-svn: 59084

before creating the SUnit for the operation that it was unfolded from. This
allows each SUnit to have all of its predecessor SUnits available at the time
it is created. I don't know yet if this will be absolutely required, but it
is a little tidier to do it this way.

llvm-svn: 59083

TargetLoweringInfo variables for the scheduler.

llvm-svn: 59082

llvm-svn: 59079

llvm-svn: 59077

llvm-svn: 59074