forked from OSchip/llvm-project
41789de165
When targeting the Darwin assembler, we need to generate markers ha16() and lo16() to designate the high and low parts of a (symbolic) immediate. This is necessary not just for plain symbols, but also for certain symbolic expression, typically along the lines of ha16(A - B). The latter doesn't work when simply using VariantKind flags on the symbol reference. This is why the current back-end uses hacks (explicitly called out as such via multiple FIXMEs) in the symbolLo/symbolHi print methods. This patch uses target-defined MCExpr codes to represent the Darwin ha16/lo16 constructs, following along the lines of the equivalent solution used by the ARM back end to handle their :upper16: / :lower16: markers. This allows us to get rid of special handling both in the symbolLo/symbolHi print method and in the common code MCExpr::print routine. Instead, the ha16 / lo16 markers are printed simply in a custom print routine for the target MCExpr types. (As a result, the symbolLo/symbolHi print methods can now replaced by a single printS16ImmOperand routine that also handles symbolic operands.) The patch also provides a EvaluateAsRelocatableImpl routine to handle ha16/lo16 constructs. This is not actually used at the moment by any in-tree code, but is provided as it makes merging into David Fang's out-of-tree Mach-O object writer simpler. Since there is no longer any need to treat VK_PPC_GAS_HA16 and VK_PPC_DARWIN_HA16 differently, they are merged into a single VK_PPC_ADDR16_HA (and likewise for the _LO16 types). llvm-svn: 182616 |
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| .. | ||
| CMakeLists.txt | ||
| LLVMBuild.txt | ||
| Makefile | ||
| PPCAsmBackend.cpp | ||
| PPCELFObjectWriter.cpp | ||
| PPCFixupKinds.h | ||
| PPCMCAsmInfo.cpp | ||
| PPCMCAsmInfo.h | ||
| PPCMCCodeEmitter.cpp | ||
| PPCMCExpr.cpp | ||
| PPCMCExpr.h | ||
| PPCMCTargetDesc.cpp | ||
| PPCMCTargetDesc.h | ||
| PPCPredicates.cpp | ||
| PPCPredicates.h | ||