Dan Gohman 15597f07b2 Teach DAGCombine to fold constant offsets into GlobalAddress nodes, ... and add a TargetLowering hook for it to use to determine when this is legal (i.e. not in PIC mode, etc.) This allows instruction selection to emit folded constant offsets in more cases, such as the included testcase, eliminating the need for explicit arithmetic instructions. This eliminates the need for the C++ code in X86ISelDAGToDAG.cpp that attempted to achieve the same effect, but wasn't as effective. Also, fix handling of offsets in GlobalAddressSDNodes in several places, including changing GlobalAddressSDNode's offset from int to int64_t. The Mips, Alpha, Sparc, and CellSPU targets appear to be unaware of GlobalAddress offsets currently, so set the hook to false on those targets. llvm-svn: 57748		2008-10-18 02:06:02 +00:00
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Alpha
ARM
CBackend
CellSPU
CPP
Generic
IA64
Mips
PowerPC
SPARC
X86