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target/openrisc: Optimize l.jal to next 

This allows the tcg optimizer to see, and fold, all of the
constants involved in a GOT base register load sequence.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2016-04-05 11:50:16 -07:00
parent 762e22edcd
commit a8000cb480
1 changed files with 5 additions and 1 deletions
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6
target/openrisc/translate.c
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@ -198,7 +198,11 @@ static void gen_jump(DisasContext *dc, int32_t n26, uint32_t reg, uint32_t op0)
tcg_gen_movi_tl(jmp_pc, tmp_pc);
break;
case 0x01: /* l.jal */
tcg_gen_movi_tl(cpu_R[9], (dc->pc + 8));
tcg_gen_movi_tl(cpu_R[9], dc->pc + 8);
/* Optimize jal being used to load the PC for PIC. */
if (tmp_pc == dc->pc + 8) {
return;
}
tcg_gen_movi_tl(jmp_pc, tmp_pc);
break;
case 0x03: /* l.bnf */