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[0/5] MSP430: Implement macros to describe relative costs of operations

Message ID 20200723154356.63ws2xairlmdufji@jozef-acer-manjaro
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Series MSP430: Implement macros to describe relative costs of operations | expand

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Jozef Lawrynowicz July 23, 2020, 3:43 p.m. UTC 
The following series of patches for MSP430 implement some of the target
macros used to determine the relative costs of operations.

To give an indication of the overall effect of these changes on
codesize, below are some size statistics collected from all the
executable files from execute.exp that are built at -Os.
There are around 1470 such tests (depending on the configuration).

The percentage change (((new - old)/old) * 100) in text size is calculated
for each test and the given metric is applied to that overall set of data.

Configuration | Mean (%) | Median (%) | Delta < 0 (count) | Delta > 0 (count)
-----------------------------------------------------------------------------
-mcpu=msp430  |  -2.4    |   -2.7     |      1454         |      17
-mcpu=msp430x |  -2.3    |   -2.4     |      1460         |      10
-mlarge       |  -1.7    |   -1.9     |      1412         |      37

Successfully regtested on trunk for msp430-elf, ok to apply?

Jozef Lawrynowicz (5):
  MSP430: Implement TARGET_MEMORY_MOVE_COST
  MSP430: Implement TARGET_RTX_COSTS
  MSP430: Add defaulting to the insn length attribute
  MSP430: Implement TARGET_INSN_COST
  MSP430: Skip index-1.c test

 gcc/config/msp430/msp430-protos.h             |   5 +-
 gcc/config/msp430/msp430.c                    | 867 ++++++++++++++++--
 gcc/config/msp430/msp430.h                    |  13 +
 gcc/config/msp430/msp430.md                   | 439 +++++++--
 gcc/config/msp430/msp430.opt                  |   4 +
 gcc/config/msp430/predicates.md               |  13 +
 gcc/testsuite/gcc.c-torture/execute/index-1.c |   2 +
 7 files changed, 1206 insertions(+), 137 deletions(-)