Chandler Carruth 2e38cf961d Introduce a loop block rotation optimization to the new block placement ... pass. This is designed to achieve one of the important optimizations that the old code placement pass did, but more simply. This is a somewhat rough and *very* conservative version of the transform. We could get a lot fancier here if there are profitable cases to do so. In particular, this only looks for a single pattern, it insists that the loop backedge being rotated away is the last backedge in the chain, and it doesn't provide any means of doing better in-loop placement due to the rotation. However, it appears that it will handle the important loops I am finding in the LLVM test suite. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145158 91177308-0d34-0410-b5e6-96231b3b80d8		2011-11-27 00:38:03 +00:00
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ARM	When fast iseling a GEP, accumulate the offset rather than emitting a series of	2011-11-17 07:15:58 +00:00
CBackend	Only run tests in test/CodeGen/CBackend/X86 when both X86 and CBackend are supported	2011-09-26 06:44:27 +00:00
CellSPU	Remove histogram tests.	2011-11-12 22:39:40 +00:00
CPP	manually upgrade a bunch of tests to modern syntax, and remove some that	2011-06-17 03:14:27 +00:00
Generic	Remove the the test which checks the saving of a vector of booleans into memory.	2011-10-16 19:06:06 +00:00
MBlaze	Change the default scheduler from Latency to ILP, since Latency	2011-10-24 17:45:02 +00:00
Mips	Reapply r143206, with fixes. Disallow physical register lifetimes	2011-11-03 21:49:52 +00:00
MSP430	Remove the explicit request for "Latency" scheduling from MSP430,	2011-10-24 17:53:16 +00:00
PowerPC	add basic PPC register-pressure feedback; adjust the vaarg test to match the new register-allocation pattern	2011-11-22 16:21:04 +00:00
PTX	allow non-device function calls in PTX when natively handling device-side printf	2011-11-11 14:45:12 +00:00
SPARC	make the asmparser reject function and type redefinitions. 'Merging' hasn't been	2011-06-17 07:06:44 +00:00
Thumb	Reapply r143206, with fixes. Disallow physical register lifetimes	2011-11-03 21:49:52 +00:00
Thumb2	Add vmov.f32 to materialize f32 immediate splats which cannot be handled by	2011-11-15 02:12:34 +00:00
X86	Introduce a loop block rotation optimization to the new block placement	2011-11-27 00:38:03 +00:00
XCore	Don't fold negative offsets into cp / dp accesses to avoid relocation errors.	2011-11-01 11:31:53 +00:00