4 Commits

Author	SHA1	Message	Date
Rafael Espindola	1e81966626	Remove arm_apcscc from the test files. It is the default and doing this ... matches what llvm-gcc and clang now produce. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106221 91177308-0d34-0410-b5e6-96231b3b80d8	2010-06-17 15:18:27 +00:00
Bob Wilson	f1b0a345d3	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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96277 91177308-0d34-0410-b5e6-96231b3b80d8	2010-02-15 21:56:40 +00:00
Bob Wilson	bf9b221c00	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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96057 91177308-0d34-0410-b5e6-96231b3b80d8	2010-02-13 00:31:44 +00:00
Bob Wilson	fe61fb1e10	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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95951 91177308-0d34-0410-b5e6-96231b3b80d8	2010-02-12 01:30:21 +00:00