Bruno Cardoso Lopes 3bde6fe0df Introduce a pass to insert vzeroupper instructions to avoid AVX to ... SSE transition penalty. The pass is enabled through the "x86-use-vzeroupper" llc command line option. This is only the first step (very naive and conservative one) to sketch out the idea, but proper DFA is coming next to allow smarter decisions. Comments and ideas now and in further commits will be very appreciated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138317 91177308-0d34-0410-b5e6-96231b3b80d8		2011-08-23 01:14:17 +00:00
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Alpha
ARM	With the fix in r138164: "Add <imp-def> operands to QQ and QQQQ stack loads."	2011-08-20 00:34:45 +00:00
Blackfin
CBackend
CellSPU
CPP
Generic
MBlaze
Mips	Use subword loads instead of a 4-byte load when the size of a structure (or a	2011-08-18 23:39:37 +00:00
MSP430
PowerPC
PTX
SPARC
SystemZ
Thumb
Thumb2	Update tests.	2011-08-19 22:19:48 +00:00
X86	Introduce a pass to insert vzeroupper instructions to avoid AVX to	2011-08-23 01:14:17 +00:00
XCore	Add intrinsics for SETEV, GETED, GETET.	2011-08-18 13:00:48 +00:00