finish without combining something it is capable of.

llvm-svn: 34865

llvm-svn: 34863

Replace expensive getZExtValue() == 0 calls with isZero() calls.

llvm-svn: 34861

llvm-svn: 34860

llvm-svn: 34859

llvm-svn: 34858

llvm-svn: 34857

llvm-svn: 34856

2. Make sure debug output of APInt values is safe for all bit widths.

llvm-svn: 34855

llvm-svn: 34854

llvm-svn: 34853

llvm-svn: 34852

llvm-svn: 34849

a value from the worklist required scanning the entire worklist to remove all
entries.  We now use a combination map+vector to prevent duplicates from
happening and prevent the scan.  This speeds up instcombine on a large file
from the llvm-gcc bootstrap from 189.7s to 4.84s in a debug build and from
5.04s to 1.37s in a release build.

llvm-svn: 34848

llvm-svn: 34846

llvm-svn: 34844

llvm-svn: 34843

- Available value use may be deleted (e.g. noop move).

llvm-svn: 34841

llvm-svn: 34839

passed in registers, not directly from the pregs themselves.

llvm-svn: 34838

llvm-svn: 34837

this to a NOTE: because pari/gp results start to get rounded incorrectly
after 192 bits of precision. APInt and pari/gp never differ by more than
1, but APInt is more accurate because it does not lose precision after 192
bits as does pari/gp.

llvm-svn: 34834

llvm-svn: 34833

llvm-svn: 34832

llvm-svn: 34831

llvm-svn: 34828

but not on X86 becuase shift by word size is "undefined".

llvm-svn: 34825

llvm-svn: 34824

llvm-svn: 34822

Constant::isNullValue() in situations where it is possible.

llvm-svn: 34821

llvm-svn: 34818

llvm-svn: 34816

using isNullValue() instead of getZExtValue() == 0.

llvm-svn: 34815

assert if the ConstantInt's value is large.

llvm-svn: 34814

bit width of the ConstantInt being converted.

llvm-svn: 34810

and back. While this is not strictly necessary, it does pave the way for
future changes in casting. It should now be possible to improve vector
casting to deal with un-equal fp/int sizes.

llvm-svn: 34808

functional change with this patch.

llvm-svn: 34806

llvm-svn: 34805

llvm-svn: 34804

llvm-svn: 34803