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Many PPC instructions have a so-called 'record form' which stores to a specific condition register the result of comparing the result of the instruction with zero (always as a signed comparison). For integer operations on PPC64, this is always a 64-bit comparison. This implementation is derived from the implementation in the ARM backend; there are some differences because PPC condition registers are allocatable virtual registers (although the record forms always use a specific one), and we look for a matching subtraction instruction after the compare (but before the first use) in addition to before it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179802 91177308-0d34-0410-b5e6-96231b3b80d8 |
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Analysis | ||
Archive | ||
AsmParser | ||
Bitcode | ||
CodeGen | ||
DebugInfo | ||
ExecutionEngine | ||
IR | ||
IRReader | ||
Linker | ||
MC | ||
Object | ||
Option | ||
Support | ||
TableGen | ||
Target | ||
Transforms | ||
CMakeLists.txt | ||
LLVMBuild.txt | ||
Makefile |