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Segher Boessenkool b8adcbd923 rs6000: Improve comparison rtx_cost (PR81288)
The current rs6000 rtx_cost for comparisons against 0 is very high if
TARGET_ISEL && !TARGET_MFCRF, much higher than for reg-reg comparisons,
much higher than a load of 0 and such a reg-reg-comparison.  This leads
to infinite recursion in CSE (see PR81288).

This patch removes the too-high cost, also simplifying this code.


	PR 81288/target
	* config/rs6000/rs6000.c (rs6000_rtx_costs): Do not handle
	TARGET_ISEL && !TARGET_MFCRF differently.  Simplify code.

From-SVN: r255188
2017-11-28 02:28:57 +01:00
config Plugin support on Windows/MinGW 2017-11-26 13:00:48 +00:00
contrib analyze_brprob.py: fix SI units 2017-11-08 07:24:14 +00:00
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gcc rs6000: Improve comparison rtx_cost (PR81288) 2017-11-28 02:28:57 +01:00
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