diff options
Diffstat (limited to 'gcc/reload1.c')
| -rw-r--r-- | gcc/reload1.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/reload1.c b/gcc/reload1.c index 9ee046a..4d2dea5 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -3607,6 +3607,20 @@ update_eliminables (HARD_REG_SET *pset) SET_HARD_REG_BIT (*pset, HARD_FRAME_POINTER_REGNUM); } +/* Return true if X is used as the target register of an elimination. */ + +bool +elimination_target_reg_p (rtx x) +{ + struct elim_table *ep; + + for (ep = reg_eliminate; ep < ®_eliminate[NUM_ELIMINABLE_REGS]; ep++) + if (ep->to_rtx == x && ep->can_eliminate) + return true; + + return false; +} + /* Initialize the table of registers to eliminate. */ static void @@ -7873,6 +7887,7 @@ gen_reload (rtx out, rtx in, int opnum, enum reload_type type) /* If that failed, copy the address register to the reload register. Then add the constant to the reload register. */ + gcc_assert (!reg_overlap_mentioned_p (out, op0)); gen_reload (out, op1, opnum, type); insn = emit_insn (gen_add2_insn (out, op0)); set_unique_reg_note (insn, REG_EQUIV, in); |