Commit Graph

65 Commits

Author SHA1 Message Date
Evan Cheng 20f7d30f92 Don't merge in tail block of a diamond if it has more than one predecessors after if-conversion.
llvm-svn: 37353
2007-05-29 23:37:20 +00:00
Evan Cheng c2237ce217 If there is an empty block between a source and its successor block, it still requires a unconditional branch.
llvm-svn: 37344
2007-05-29 22:31:16 +00:00
Evan Cheng 13f5f7df95 Silly boog.
llvm-svn: 37328
2007-05-25 00:59:01 +00:00
Evan Cheng d0e669199b Preliminary iterative if-conversion support.
llvm-svn: 37309
2007-05-23 07:23:16 +00:00
Evan Cheng e26c0916a3 If-convert early exit blocks (returns, etc.); bug fixes, etc.
llvm-svn: 37270
2007-05-21 22:22:58 +00:00
Evan Cheng 018cffbca4 Clean up.
llvm-svn: 37237
2007-05-18 19:32:08 +00:00
Evan Cheng faaf716540 Change to depth-first traversal.
llvm-svn: 37236
2007-05-18 19:26:33 +00:00
Evan Cheng 2e82cefd24 Some restructuring in preparation for most aggressive if-conversion.
llvm-svn: 37231
2007-05-18 18:14:37 +00:00
Evan Cheng f25d3a5d73 Watch out for blocks that end with a return.
llvm-svn: 37227
2007-05-18 17:06:53 +00:00
Evan Cheng 478b805956 If true / false blocks fallthrough before ifcvt, add unconditional branches to ifcvt'd block.
llvm-svn: 37200
2007-05-18 01:55:58 +00:00
Evan Cheng 0f745da4fe Make use of target specific block size limits; bug fixes.
llvm-svn: 37195
2007-05-18 00:20:58 +00:00
Evan Cheng af71610429 isBlockPredicable() always ignore terminal instructions; add comments.
llvm-svn: 37126
2007-05-16 21:54:37 +00:00
Evan Cheng 5ea933a009 Rename M_PREDICATED to M_PREDICABLE; Moved isPredicable() to MachineInstr.
llvm-svn: 37121
2007-05-16 20:56:08 +00:00
Evan Cheng 35fc2119b0 Devang points out that we need an assertion here.
llvm-svn: 37097
2007-05-16 05:11:10 +00:00
Evan Cheng f5e53a58db Initial commit of (very basic) if converter.
llvm-svn: 37092
2007-05-16 02:00:57 +00:00