llvm-6502/test/CodeGen
Preston Gurd dd30b47175 The current Intel Atom microarchitecture has a feature whereby when a function
returns early then it is slightly faster to execute a sequence of NOP
instructions to wait until the return address is ready,
as opposed to simply stalling on the ret instruction
until the return address is ready.

When compiling for X86 Atom only, this patch will run a pass, called
"X86PadShortFunction" which will add NOP instructions where less than four
cycles elapse between function entry and return.

It includes tests.

Patch by Andy Zhang.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171524 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04 20:54:54 +00:00
..
ARM Revert "Adding support for llvm.arm.neon.vaddl[su].* and" 2012-12-20 21:09:38 +00:00
CPP
Generic
Hexagon
MBlaze
Mips [mips] MipsTargetLowering::getSetCCResultType should return a vector type if 2013-01-04 20:06:01 +00:00
MSP430
NVPTX
PowerPC Support ppcf128 in SelectionDAG::getConstantFP 2012-12-30 19:03:32 +00:00
R600 DAGCombiner: Avoid generating illegal vector INT_TO_FP nodes 2013-01-02 22:13:01 +00:00
SI
SPARC
Thumb
Thumb2 On some ARM cpus, flags setting movs with shifter operand, i.e. lsl, lsr, asr, 2012-12-20 19:59:30 +00:00
X86 The current Intel Atom microarchitecture has a feature whereby when a function 2013-01-04 20:54:54 +00:00
XCore