llvm-svn: 17870

hold your nose!)

llvm-svn: 17869

already been emitted, we don't have to remember it and deal with it later,
just emit it directly.

llvm-svn: 17868

* Get rid of "emitMaybePCRelativeValue", either we want to emit a PC relative
  value or not: drop the maybe BS.  As it turns out, the only places where
  the bool was a variable coming in, the bool was a dynamic constant.

llvm-svn: 17867

immediately instead of lazily.

In this program, for example:

int main() {
  printf("hello world\n");
  printf("hello world\n");
  printf("hello world\n");
  printf("hello world\n");
}

We used to have to go through compilation callback 4 times (once for each
call to printf), now we don't go to it at all.

Thanks to Misha for noticing this, and for adding the initial ghost linkage
patches.

llvm-svn: 17864

already has been.  This may be a small speedup.

llvm-svn: 17863

set up.

llvm-svn: 17862

llvm-svn: 17861

bytecode files by about 8 bytes per external function

llvm-svn: 17859

body for the function.

llvm-svn: 17858

llvm-svn: 17857

the dtor for the BytecodeReader class will try to free it again!

llvm-svn: 17856

llvm-svn: 17855

AT ALL.  This saves 11 bytes per external function from the bytecode file,
and is also required to make GhostLinkage work.

llvm-svn: 17854

FunctionBlock.

llvm-svn: 17853

llvm-svn: 17851

llvm-svn: 17834

Patch contributed by Morten Ofstad.

llvm-svn: 17830

Patch contributed by Morten Ofstad

llvm-svn: 17827

Patch provided by Morten Ofstad

llvm-svn: 17826

llvm-svn: 17825

llvm-svn: 17824

llvm-svn: 17823

llvm-svn: 17822

llvm-svn: 17821

 1. Speedup getValueState by having it not consider Arguments.  It's better
    to just add them before we start SCCP'ing.
 2. SCCP can delete the contents of dead blocks.  No really, it's ok!  This
    reduces the size of the IR for subsequent passes, even though
    simplifycfg would do the same job.  In practice, simplifycfg does not
    run until much later than sccp in gccas

llvm-svn: 17820

llvm-svn: 17818

llvm-svn: 17817

class.  The only changes are minor:

 * Do not try to SCCP instructions that return void in the rewrite loop.
   This is silly and fool hardy, wasting a map lookup and adding an entry
   to the map which is never used.
 * If we decide something has an undefined value, rewrite it to undef,
   potentially leading to further simplications.

llvm-svn: 17816

llvm-svn: 17815

seemingly ubiquitous gettimeofday(3) call.

llvm-svn: 17813

  symbol table.
* Make sure we update the file pointer for each member when rebuilding the
  symbol table.

llvm-svn: 17812

llvm-svn: 17811

llvm-svn: 17810

returnn false if the file doesn't exist rather than throw ane exception.

llvm-svn: 17809

llvm-svn: 17807

llvm-svn: 17806

llvm-svn: 17801

llvm-svn: 17800

llvm-svn: 17799