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DISCONTINUED:openSUSE:11.2
gcc43
nvl425806.patch
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File nvl425806.patch of Package gcc43
2008-04-22 Pat Haugen <pthaugen@us.ibm.com> * config/rs6000/rs6000.c (rs6000_register_move_cost): Increase cost of LR/CTR moves for Power6. Index: gcc/config/rs6000/rs6000.c =================================================================== --- gcc.orig/config/rs6000/rs6000.c 2008-09-10 17:37:30.000000000 -0300 +++ gcc/config/rs6000/rs6000.c 2008-09-10 17:37:37.000000000 -0300 @@ -21387,6 +21387,12 @@ else if (from == CR_REGS) return 4; + /* Power6 has slower LR/CTR moves so make them more expensive than + memory in order to bias spills to memory .*/ + else if (rs6000_cpu == PROCESSOR_POWER6 + && reg_classes_intersect_p (from, LINK_OR_CTR_REGS)) + return 6 * hard_regno_nregs[0][mode]; + else /* A move will cost one instruction per GPR moved. */ return 2 * hard_regno_nregs[0][mode];
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