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i965: Optimize reading the destination type

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brw_hw_type_to_reg_type() needs to know only whether the file is
BRW_IMMEDIATE_VALUE or not, which is not a valid file for the
destination. gcc and clang will evaluate __builtin_strcmp() at compile
time, so we can use it to pass a constant file for the destination.

   text	   data	    bss	    dec	    hex	filename
7816214	 346248	 420496	8582958	 82f72e	i965_dri.so before
7816070	 346248	 420496	8582814	 82f69e	i965_dri.so after

Reviewed-by: Scott D Phillips <scott.d.phillips@intel.com>
This commit is contained in:
Matt Turner
2017-08-02 23:20:00 -07:00
parent 91ef949054
commit a98b1a8922
1 changed files with 3 additions and 1 deletions
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4
src/intel/compiler/brw_inst.h
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@@ -669,7 +669,9 @@ static inline enum brw_reg_type \
brw_inst_##reg##_type(const struct gen_device_info *devinfo, \
const brw_inst *inst) \
{ \
unsigned file = brw_inst_##reg##_reg_file(devinfo, inst); \
unsigned file = __builtin_strcmp("dst", #reg) == 0 ? \
BRW_GENERAL_REGISTER_FILE : \
brw_inst_##reg##_reg_file(devinfo, inst); \
unsigned hw_type = brw_inst_##reg##_reg_hw_type(devinfo, inst); \
return brw_hw_type_to_reg_type(devinfo, (enum brw_reg_file)file, hw_type); \
}