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Diffstat (limited to 'llvm/docs/SourceLevelDebugging.rst')
| -rw-r--r-- | llvm/docs/SourceLevelDebugging.rst | 22 |
1 files changed, 2 insertions, 20 deletions
diff --git a/llvm/docs/SourceLevelDebugging.rst b/llvm/docs/SourceLevelDebugging.rst index 357f720..e5984cd 100644 --- a/llvm/docs/SourceLevelDebugging.rst +++ b/llvm/docs/SourceLevelDebugging.rst @@ -576,15 +576,13 @@ the equivalent location is used. After MIR locations are assigned to each variable, machine pseudo-instructions corresponding to each ``llvm.dbg.value`` and ``llvm.dbg.addr`` intrinsic are -inserted. There are two forms of this type of instruction. - -The first form, ``DBG_VALUE``, appears thus: +inserted. These ``DBG_VALUE`` instructions appear thus: .. code-block:: text DBG_VALUE %1, $noreg, !123, !DIExpression() -And has the following operands: +And have the following operands: * The first operand can record the variable location as a register, a frame index, an immediate, or the base address register if the original debug intrinsic referred to memory. ``$noreg`` indicates the variable @@ -596,22 +594,6 @@ And has the following operands: * Operand 3 is the Variable field of the original debug intrinsic. * Operand 4 is the Expression field of the original debug intrinsic. -The second form, ``DBG_VALUE_LIST``, appears thus: - -.. code-block:: text - - DBG_VALUE_LIST !123, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), %1, %2 - -And has the following operands: - * The first operand is the Variable field of the original debug intrinsic. - * The second operand is the Expression field of the original debug intrinsic. - * Any number of operands, from the 3rd onwards, record a sequence of variable - location operands, which may take any of the same values as the first - operand of the ``DBG_VALUE`` instruction above. These variable location - operands are inserted into the final DWARF Expression in positions indicated - by the DW_OP_LLVM_arg operator in the DIExpression, as described in - :ref:`DIExpression<_DIExpression>`. - The position at which the DBG_VALUEs are inserted should correspond to the positions of their matching ``llvm.dbg.value`` intrinsics in the IR block. As with optimization, LLVM aims to preserve the order in which variable |