Add statistic for number of bytes of data area initialized.
We used this statistic in collecting data for the paper, but I forgot
to commit it.

llvm-svn: 5112

llvm-svn: 5111

llvm-svn: 5110

llvm-svn: 5109

llvm-svn: 5108

llvm-svn: 5107

* Add a new option to eliminate spilling of registers that are only used
  within a basic block.

llvm-svn: 5106

llvm-svn: 5105

llvm-svn: 5104

llvm-svn: 5103

llvm-svn: 5102

Represent empty use/def list as a null pointer

llvm-svn: 5101

llvm-svn: 5100

llvm-svn: 5099

llvm-svn: 5098

llvm-svn: 5097

Move X86 specific alignment gunk to X86 files

llvm-svn: 5096

stack remains aligned

llvm-svn: 5095

llvm-svn: 5094

llvm-svn: 5093

llvm-svn: 5092

llvm-svn: 5091

llvm-svn: 5090

llvm-svn: 5089

  * Only load incoming arguments into virtual registers once at the
    beginning of the function
  * Assign different virtual registers to each reference to constants/globals

llvm-svn: 5088

llvm-svn: 5087

llvm-svn: 5086

llvm-svn: 5085

llvm-svn: 5084

llvm-svn: 5083

* Implement register alias set support

llvm-svn: 5082

llvm-svn: 5081

llvm-svn: 5080

llvm-svn: 5079

llvm-svn: 5078

llvm-svn: 5077

llvm-svn: 5076

llvm-svn: 5075

llvm-svn: 5074

llvm-svn: 5073