Duncan Sands 8fb2c3827c At -O123 the early-cse pass is run before instcombine has run. According to my ... auto-simplier the transform most missed by early-cse is (zext X) != 0 -> X != 0. This patch adds this transform and some related logic to InstructionSimplify and removes some of the logic from instcombine (unfortunately not all because there are several situations in which instcombine can improve things by making new instructions, whereas instsimplify is not allowed to do this). At -O2 this often results in more than 15% more simplifications by early-cse, and results in hundreds of lines of bitcode being eliminated from the testsuite. I did see some small negative effects in the testsuite, for example a few additional instructions in three programs. One program, 483.xalancbmk, got an additional 35 instructions, which seems to be due to a function getting an additional instruction and then being inlined all over the place. llvm-svn: 123911		2011-01-20 13:21:55 +00:00
clang	Fix the computation of alignment for fields of packed+aligned structs.	2011-01-20 07:57:12 +00:00
compiler-rt	Add missing <stdint.h> to build properly on Solaris. Patch by Joakim Johansson	2011-01-07 19:09:06 +00:00
debuginfo-tests	Test case for r123199.	2011-01-11 00:31:01 +00:00
libcxx	Add attribute to inlined member.	2011-01-13 20:05:05 +00:00
lldb	Fixed the async packets (packets that need to be sent to the GDB server	2011-01-20 07:53:45 +00:00
llvm	At -O123 the early-cse pass is run before instcombine has run. According to my	2011-01-20 13:21:55 +00:00