In rare situations, pa_emit_move_sequence needs to handle a paradoxical
SUBREG in a
floating-point load or store. There is existing code to adjust the
operand's address but
we fail to emit the reload if we don't need to load the address to a
register. We just
fall through pa_emit_move_sequence and emit the original operand.
This patch revises the handling of these reloads to always emit the
reload with the
adjusted operand.
Tested on hppa-unknown-linux-gnu and hppa64-hp-hpux11.11. Committed to
trunk.
Dave
--
John David Anglin dave.ang...@bell.net
2018-03-14 John David Anglin <dang...@gcc.gnu.org>
PR target/83451
* config/pa/pa.c (pa_emit_move_sequence): Always emit secondary reload
insn for floating-point loads and stores.
Index: config/pa/pa.c
===================================================================
--- config/pa/pa.c (revision 258420)
+++ config/pa/pa.c (working copy)
@@ -1750,9 +1750,7 @@
}
else
emit_move_insn (scratch_reg, XEXP (op1, 0));
- emit_insn (gen_rtx_SET (operand0,
- replace_equiv_address (op1, scratch_reg)));
- return 1;
+ op1 = replace_equiv_address (op1, scratch_reg);
}
}
else if ((!INT14_OK_STRICT && symbolic_memory_operand (op1, VOIDmode))
@@ -1762,10 +1760,10 @@
/* Load memory address into SCRATCH_REG. */
scratch_reg = force_mode (word_mode, scratch_reg);
emit_move_insn (scratch_reg, XEXP (op1, 0));
- emit_insn (gen_rtx_SET (operand0,
- replace_equiv_address (op1, scratch_reg)));
- return 1;
+ op1 = replace_equiv_address (op1, scratch_reg);
}
+ emit_insn (gen_rtx_SET (operand0, op1));
+ return 1;
}
else if (scratch_reg
&& FP_REG_P (operand1)
@@ -1803,9 +1801,7 @@
}
else
emit_move_insn (scratch_reg, XEXP (op0, 0));
- emit_insn (gen_rtx_SET (replace_equiv_address (op0, scratch_reg),
- operand1));
- return 1;
+ op0 = replace_equiv_address (op0, scratch_reg);
}
}
else if ((!INT14_OK_STRICT && symbolic_memory_operand (op0, VOIDmode))
@@ -1815,10 +1811,10 @@
/* Load memory address into SCRATCH_REG. */
scratch_reg = force_mode (word_mode, scratch_reg);
emit_move_insn (scratch_reg, XEXP (op0, 0));
- emit_insn (gen_rtx_SET (replace_equiv_address (op0, scratch_reg),
- operand1));
- return 1;
+ op0 = replace_equiv_address (op0, scratch_reg);
}
+ emit_insn (gen_rtx_SET (op0, operand1));
+ return 1;
}
/* Handle secondary reloads for loads of FP registers from constant
expressions by forcing the constant into memory. For the most part,
