diff options
Diffstat (limited to 'llvm/lib/CodeGen/AsmPrinter/DwarfExpression.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/AsmPrinter/DwarfExpression.cpp | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.cpp index 96ce3600417..df33a4faa85 100644 --- a/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.cpp +++ b/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.cpp @@ -155,20 +155,18 @@ bool DwarfExpression::addMachineReg(const TargetRegisterInfo &TRI, CurSubReg.set(Offset, Offset + Size); // If this sub-register has a DWARF number and we haven't covered - // its range, emit a DWARF piece for it. - if (CurSubReg.test(Coverage)) { + // its range, and its range covers the value, emit a DWARF piece for it. + if (Offset < MaxSize && CurSubReg.test(Coverage)) { // Emit a piece for any gap in the coverage. if (Offset > CurPos) - DwarfRegs.push_back({-1, Offset - CurPos, "no DWARF register encoding"}); + DwarfRegs.push_back( + {-1, Offset - CurPos, "no DWARF register encoding"}); DwarfRegs.push_back( {Reg, std::min<unsigned>(Size, MaxSize - Offset), "sub-register"}); - if (Offset >= MaxSize) - break; - - // Mark it as emitted. - Coverage.set(Offset, Offset + Size); - CurPos = Offset + Size; } + // Mark it as emitted. + Coverage.set(Offset, Offset + Size); + CurPos = Offset + Size; } // Failed to find any DWARF encoding. if (CurPos == 0) @@ -391,6 +389,7 @@ void DwarfExpression::addExpression(DIExpressionCursor &&ExprCursor, // empty DW_OP_piece / DW_OP_bit_piece before we emitted the base // location. assert(OffsetInBits >= FragmentOffset && "fragment offset not added?"); + assert(SizeInBits >= OffsetInBits - FragmentOffset && "size underflow"); // If addMachineReg already emitted DW_OP_piece operations to represent // a super-register by splicing together sub-registers, subtract the size |
