Data Fields | |
| rtx | const_rtx |
| rtx | const_insn |
| rtx | comparison_const |
| int | comparison_qty |
| unsigned int | first_reg |
| unsigned int | last_reg |
Detailed Description
Per-qty information tracking.
`first_reg' and `last_reg' track the head and tail of the chain of registers which currently contain this quantity.
`mode' contains the machine mode of this quantity.
`const_rtx' holds the rtx of the constant value of this quantity, if known. A summations of the frame/arg pointer and a constant can also be entered here. When this holds a known value, `const_insn' is the insn which stored the constant value.
`comparison_{code,const,qty}' are used to track when a comparison between a quantity and some constant or register has been passed. In such a case, we know the results of the comparison in case we see it again. These members record a comparison that is known to be true. `comparison_code' holds the rtx code of such a comparison, else it is set to UNKNOWN and the other two comparison members are undefined. `comparison_const' holds the constant being compared against, or zero if the comparison is not against a constant. `comparison_qty' holds the quantity being compared against when the result is known. If the comparison is not with a register, `comparison_qty' is -1.
Field Documentation
| rtx qty_table_elem::comparison_const |
| int qty_table_elem::comparison_qty |
| rtx qty_table_elem::const_insn |
Referenced by lookup_as_function().
| rtx qty_table_elem::const_rtx |
Referenced by lookup_as_function().
| unsigned int qty_table_elem::first_reg |
| unsigned int qty_table_elem::last_reg |
The documentation for this struct was generated from the following file:
