Duncan Sands d462ba8539 Teach LegalizeTypes how to expand and promote CTLZ, ... CTTZ and CTPOP. The expansion code differs from that in LegalizeDAG in that it chooses to take the CTLZ/CTTZ count from the Hi/Lo part depending on whether the Hi/Lo value is zero, not on whether CTLZ/CTTZ of Hi/Lo returned 32 (or whatever the width of the type is) for it. I made this change because the optimizers may well know that Hi/Lo is zero and exploit it. The promotion code for CTTZ also differs from that in LegalizeDAG: it uses an "or" to get the right result when the original value is zero, rather than using a compare and select. This also means the value doesn't need to be zero extended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47075 91177308-0d34-0410-b5e6-96231b3b80d8		2008-02-13 18:01:53 +00:00
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Analysis	Fix typo. Thanks to Duncan for noticing.	2008-02-13 12:21:32 +00:00
Archive	Use empty() instead of comparing size() with zero.	2008-01-29 13:02:09 +00:00
AsmParser	Back out mods to llvmAsmParser, incorrectly committed	2008-01-30 03:10:00 +00:00
Bitcode	Use empty() instead of comparing size() with zero.	2008-01-29 13:02:09 +00:00
CodeGen	Teach LegalizeTypes how to expand and promote CTLZ,	2008-02-13 18:01:53 +00:00
Debugger	Remove attribution from file headers, per discussion on llvmdev.	2007-12-29 20:36:04 +00:00
ExecutionEngine	Use empty() instead of comparing size() with zero.	2008-01-29 13:02:09 +00:00
Linker	Remove attribution from file headers, per discussion on llvmdev.	2007-12-29 20:36:04 +00:00
Support	Added "Profile" method to APFloat for use with FoldingSet.	2008-02-11 17:24:50 +00:00
System	Remove use of ltdl	2008-02-13 17:11:39 +00:00
Target	Fix the PPC JIT regressions by encoding zeroreg as 0 for BLR.	2008-02-13 17:24:14 +00:00
Transforms	remove some dead code.	2008-02-13 17:18:26 +00:00
VMCore	check that terminators only occur at the end of a block. This catches the	2008-02-09 01:06:01 +00:00
Makefile	remove attribution from lib Makefiles.	2007-12-29 20:09:26 +00:00