Ping. BR, Terry
> -----Original Message----- > From: gcc-patches-ow...@gcc.gnu.org [mailto:gcc-patches- > ow...@gcc.gnu.org] On Behalf Of Terry Guo > Sent: Wednesday, November 06, 2013 2:11 PM > To: gcc-patches@gcc.gnu.org > Cc: Richard Earnshaw; Ramana Radhakrishnan > Subject: [Patch, ARM] New feature to minimize the literal load for armv7-m > target > > Hi, > > This patch intends to minimize the use of literal pool for some armv7-m > targets that have slower speed to load data from flash than to fetch > instruction from flash. The normal literal load instruction is now replaced > by MOVW/MOVT instructions. A new option -mslow-flash-data is created for > this purpose. So far this feature doesn't support PIC code and target that > isn't based on armv7-m. > > Tested with GCC regression test on QEMU for cortex-m3. No new > regressions. > Is it OK to trunk? > > BR, > Terry > > 2013-11-06 Terry Guo <terry....@arm.com> > > * doc/invoke.texi (-mslow-flash-data): Document new option. > * config/arm/arm.opt (mslow-flash-data): New option. > * config/arm/arm-protos.h > (arm_max_const_double_inline_cost): Declare it. > * config/arm/arm.h (TARGET_USE_MOVT): Always true when > disable literal pools. > (arm_disable_literal_pool): Declare it. > * config/arm/arm.c (arm_disable_literal_pool): New > variable. > (arm_option_override): Handle new option. > (thumb2_legitimate_address_p): Invalid certain address > format. > (arm_max_const_double_inline_cost): New function. > * config/arm/arm.md (types.md): Include it a little > earlier. > (use_literal_pool): New attribute. > (enabled): Use new attribute. > (split pattern): Replace symbol+offset with MOVW/MOVT.
