forked from OSchip/llvm-project
6f36cd4d76
When deciding if it is safe to optimize a conditional branch to a CBZ or CBNZ the offsets of the BasicBlocks from the start of the function are estimated. For inline assembly the generic getInlineAsmLength() function is used to get a worst case estimate of the inline assembly by multiplying the number of instructions by the max instruction size of 4 bytes. This unfortunately doesn't take into account the generation of Thumb implicit IT instructions. In edge cases such as when all the instructions in the block are 4-bytes in size and there is an implicit IT then the size is underestimated. This can cause an out of range CBZ or CBNZ to be generated. The patch takes a conservative approach and assumes that every instruction in the inline assembly block may have an implicit IT. Fixes pr31805 Differential Revision: https://reviews.llvm.org/D52834 llvm-svn: 343960 |
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| .. | ||
| ARMAddressingModes.h | ||
| ARMAsmBackend.cpp | ||
| ARMAsmBackend.h | ||
| ARMAsmBackendDarwin.h | ||
| ARMAsmBackendELF.h | ||
| ARMAsmBackendWinCOFF.h | ||
| ARMBaseInfo.h | ||
| ARMELFObjectWriter.cpp | ||
| ARMELFStreamer.cpp | ||
| ARMFixupKinds.h | ||
| ARMMCAsmInfo.cpp | ||
| ARMMCAsmInfo.h | ||
| ARMMCCodeEmitter.cpp | ||
| ARMMCExpr.cpp | ||
| ARMMCExpr.h | ||
| ARMMCTargetDesc.cpp | ||
| ARMMCTargetDesc.h | ||
| ARMMachORelocationInfo.cpp | ||
| ARMMachObjectWriter.cpp | ||
| ARMTargetStreamer.cpp | ||
| ARMUnwindOpAsm.cpp | ||
| ARMUnwindOpAsm.h | ||
| ARMWinCOFFObjectWriter.cpp | ||
| ARMWinCOFFStreamer.cpp | ||
| CMakeLists.txt | ||
| LLVMBuild.txt | ||