Duncan Sands 02b5e72ac6 GVN does simple propagation of conditions: when it sees a conditional ... branch "br i1 %x, label %if_true, label %if_false" then it replaces "%x" with "true" in places only reachable via the %if_true arm, and with "false" in places only reachable via the %if_false arm. Except that actually it doesn't: if value numbering shows that %y is equal to %x then, yes, %y will be turned into true/false in this way, but any occurrences of %x itself are not transformed. Fix this. What's more, it's often the case that %x is an equality comparison such as "%x = icmp eq %A, 0", in which case every occurrence of %A that is only reachable via the %if_true arm can be replaced with 0. Implement this and a few other variations on this theme. This reduces the number of lines of LLVM IR in "GCC as one big file" by 0.2%. It has a bigger impact on Ada code, typically reducing the number of lines of bitcode by around 0.4% by removing repeated compiler generated checks. Passes the LLVM nightly testsuite and the Ada ACATS testsuite. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141177 91177308-0d34-0410-b5e6-96231b3b80d8		2011-10-05 14:28:49 +00:00
..
Analysis	Fix a broken assert found by -Wparentheses.	2011-10-05 07:02:23 +00:00
Archive
AsmParser	Remove last references to hotpatch.	2011-10-04 03:08:43 +00:00
Bitcode	Also update the EH with bitcode. I missed this earlier. Thanks to Duncan for pointing it out.	2011-10-05 07:04:14 +00:00
CodeGen	Also add <imp-use,kill> flags for redefined super-registers.	2011-10-05 00:01:48 +00:00
DebugInfo	DWARF: avoid unnecessary map lookups.	2011-09-21 17:31:42 +00:00
ExecutionEngine	MCJIT initialization TargetData	2011-09-30 16:40:10 +00:00
Linker	lib/Linker: add support of deps which does not end with ".so".	2011-09-20 22:52:35 +00:00
MC	Teach the MC to output code/data region marker labels in MachO and ELF modes. These are used by disassemblers to provide better disassembly, particularly on targets like ARM Thumb that like to intermingle data in the TEXT segment.	2011-10-04 23:26:17 +00:00
Object	Object: Add isSection{Data,BSS}.	2011-09-28 20:57:30 +00:00
Support	Add more initializers to quiet a clang warning.	2011-10-05 05:00:26 +00:00
TableGen	Replace snprintf with raw_string_ostream.	2011-10-04 21:08:56 +00:00
Target	MipsDelaySlotFiller.cpp: Appease msvc to specify llvm::next() explicitly.	2011-10-05 10:11:02 +00:00
Transforms	GVN does simple propagation of conditions: when it sees a conditional	2011-10-05 14:28:49 +00:00
VMCore	Unbreak CMake build.	2011-10-04 18:22:24 +00:00
CMakeLists.txt	Move TableGen's parser and entry point into a library	2011-10-01 16:41:13 +00:00
Makefile	Remove more of llvmc and dependencies.	2011-09-20 00:34:27 +00:00