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add a bunch more notes. I survived.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115418 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2010-10-02 19:32:01 +00:00
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@ -125,6 +125,34 @@ Almost dead code.
AVX support in the MC assembler. Full compiler support not done yet.
Atomics now get legalized when not natively supported (jim g)
ARM: General performance work and tuning.
Bottom up fast isel. Simple Load reuse. No more machinedce. Load folding at -O0?
New linker_private_weak and linker_private_weak_def_auto linkage types
compiler_rt softfloat support.
X86 ABI: <2 x float> in IR no longer maps onto MMX, it turns into <4 x float>
IR ABI: <3 x float> is passed as <4 x float> instead of 3 floats.
renamed "Release" -> "Release+Asserts"; "Release-Asserts" -> "Release etc.
New COPY instruction. copyRegToReg -> copyPhysReg, isMoveInstr is gone.
JumpThreading much more aggressive about implied value relations.
New RegionInfo pass "opt -regions analyze" or "opt -view-regions".
mc assembler supports macros.
RenderMachineFunction: -rendermf
SplitKit?
Evan: Teach bottom up pre-ra scheduler to track register pressure. Work in progress.
Evan: Add an ILP scheduler. On x86_64, this is a win for all tests in CFP2000. It also sped up 256.bzip2 by 16%.
RegisterPass<> -> INTIALIZE_PASS()
llvm-diff?
Preliminary work on TBAA but not usable in 2.8.
Atomic lowering patch: -loweratomic (see Passes.html#loweratomic)
compiler_rt now includes extensive a fairly testsuite for blocks language feature and the blocks runtime.
New OptimizeExts+OptimizeCmps -> PeepholeOptimizer pass
Triples are now stored in normalized form. Triple::normalize.
New LocalStackSlotAllocation.cpp pass (jimg)
New llvm.x86.int intrinsic (for int $42 and int3)
New CorrelatedValuePropagation pass, not on by default in 2.8 yet.
Verbose assembly decodes X86 shuffle instructions, e.g.:
insertps $113, %xmm3, %xmm0 ## xmm0 = zero,xmm0[1,2],xmm3[1]
unpcklps %xmm1, %xmm0 ## xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
pshufd $1, %xmm1, %xmm1 ## xmm1 = xmm1[1,0,0,0]
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