Hi all, Shift operations with an immediate can generate a 16-bit encoding when the immediate is 5-bit wide, i.e. in the range [0-31]. Therefore we can use them in IT blocks even with the -mrestrict-it rules.
I decided to reuse the "N" constraint with a slight modification by removing
the !TARGET_32BIT condition from it. The "N" constraint is only used in a few
patterns that are predicated by TARGET_THUMB1 anyway, so there's no reason for
the constraint to check for that as well.
Tested arm-none-eabi on model and bootstrapped on Chromebook.
Ok for trunk?
Thanks,
Kyrill
2013-09-09 Kyrylo Tkachov <kyrylo.tkac...@arm.com>
* config/arm/arm.md (arm_shiftsi3): New alternative l/l/N.
* config/arm/constraints.md ("N"): Remove !TARGET_32BIT condition.
2013-09-09 Kyrylo Tkachov <kyrylo.tkac...@arm.com>
* gcc.target/arm/thumb-ifcvt-2.c: New test.
cond-shifts.patch
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