4 Commits

Author	SHA1	Message	Date
Rafael Espindola	29dda21e96	Remove arm_apcscc from the test files. It is the default and doing this ... matches what llvm-gcc and clang now produce. llvm-svn: 106221	2010-06-17 15:18:27 +00:00
Bob Wilson	9be7200b08	Last week we were generating code with duplicate induction variables in this ... test, but the problem seems to have gone away today. Add a check to make sure it doesn't come back. llvm-svn: 96277	2010-02-15 21:56:40 +00:00
Bob Wilson	01abf8fc2f	Besides removing phi cycles that reduce to a single value, also remove dead ... phi cycles. Adjust a few tests to keep dead instructions from being optimized away. This (together with my previous change for phi cycles) fixes Apple radar 7627077. llvm-svn: 96057	2010-02-13 00:31:44 +00:00
Bob Wilson	0827e040e0	Add a new pass on machine instructions to optimize away PHI cycles that ... reduce down to a single value. InstCombine already does this transformation but DAG legalization may introduce new opportunities. This has turned out to be important for ARM where 64-bit values are split up during type legalization: InstCombine is not able to remove the PHI cycles on the 64-bit values but the separate 32-bit values can be optimized. I measured the compile time impact of this (running llc on 176.gcc) and it was not significant. llvm-svn: 95951	2010-02-12 01:30:21 +00:00