Make the assignment operator for SmallPtrSet much faster for normal cases.

llvm-svn: 38474

Make the assignment operator for SmallPtrSet return a reference, and fix a long-standing bug in the copy
ctor while I'm at it.

Thanks to Chris Lattner for help with this patch.

llvm-svn: 38470

Fix an error in the assignment operator that was causing an infinite loop in GVNPRE.cpp.
Patch by Chis Lattner.

llvm-svn: 38467

implement operator= for smallptrset

llvm-svn: 38460

Fix a bug in SmallPtrSet that was causing GVNPRE to enter an infinite loop.

llvm-svn: 37697

Two changes:
1. Make SmallPtrSet::erase faster in the small case by replacing a memmove
with a pointer copy.
2. Fix a bug where the null terminator at the end of the array in the small
case

Two changes:
1. Make SmallPtrSet::erase faster in the small case by replacing a memmove
with a pointer copy.
2. Fix a bug where the null terminator at the end of the array in the small
case was not copied

llvm-svn: 37696

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Fix PR1329.

llvm-svn: 36016

do not let the table fill up with tombstones.

llvm-svn: 33973

Fix a bug in smallptrset::erase: in the small case, return true if the
element was in the set.

llvm-svn: 33931

implement SmallPtrSet::erase

llvm-svn: 33581

add a note

llvm-svn: 33578

Add a new SmallSet ADT specialized for pointers.

llvm-svn: 33577