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riscv-gcc-1
Commit 6d545b71 by Richard Kenner
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(REGISTER_MOVE_COST): Moving between special registers is expensive. 

From-SVN: r8035
parent 66415c8b
Showing with 6 additions and 0 deletions
gcc/config/rs6000/rs6000.h
......@@ -478,6 +478,12 @@ extern char *rs6000_cpu_string;
((CLASS1) == FLOAT_REGS && (CLASS2) == FLOAT_REGS ? 2 \
: (CLASS1) == FLOAT_REGS && (CLASS2) != FLOAT_REGS ? 10 \
: (CLASS1) != FLOAT_REGS && (CLASS2) == FLOAT_REGS ? 10 \
: (((CLASS1) == SPECIAL_REGS \
|| (CLASS1) == MQ_REGS || (CLASS1) == LINK_REGS \
|| (CLASS1) == CTR_REGS || (CLASS1) == BASE_REGS) \
&& ((CLASS2) == SPECIAL_REGS \
|| (CLASS2) == MQ_REGS || (CLASS2) == LINK_REGS \
|| (CLASS2) == CTR_REGS || (CLASS2) == BASE_REGS)) ? 10 \
: 2)
/* A C expressions returning the cost of moving data of MODE from a register to
......
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