From 3f125532e6f26606080d77738c0a385a20733a39 Mon Sep 17 00:00:00 2001 From: Richard Sandiford Date: Thu, 7 Jul 2011 15:05:42 +0000 Subject: reload1.c (choose_reload_regs): Use mode sizes to check whether an old reload register completely defines the... gcc/ * reload1.c (choose_reload_regs): Use mode sizes to check whether an old reload register completely defines the required value. gcc/testsuite/ * gcc.target/arm/neon-modes-3.c: New test. From-SVN: r175980 --- gcc/reload1.c | 16 +++------------- 1 file changed, 3 insertions(+), 13 deletions(-) (limited to 'gcc/reload1.c') diff --git a/gcc/reload1.c b/gcc/reload1.c index 7f84fc8..499412c 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -6481,6 +6481,8 @@ choose_reload_regs (struct insn_chain *chain) if (regno >= 0 && reg_last_reload_reg[regno] != 0 + && (GET_MODE_SIZE (GET_MODE (reg_last_reload_reg[regno])) + >= GET_MODE_SIZE (mode) + byte) #ifdef CANNOT_CHANGE_MODE_CLASS /* Verify that the register it's in can be used in mode MODE. */ @@ -6492,24 +6494,12 @@ choose_reload_regs (struct insn_chain *chain) { enum reg_class rclass = rld[r].rclass, last_class; rtx last_reg = reg_last_reload_reg[regno]; - enum machine_mode need_mode; i = REGNO (last_reg); i += subreg_regno_offset (i, GET_MODE (last_reg), byte, mode); last_class = REGNO_REG_CLASS (i); - if (byte == 0) - need_mode = mode; - else - need_mode - = smallest_mode_for_size - (GET_MODE_BITSIZE (mode) + byte * BITS_PER_UNIT, - GET_MODE_CLASS (mode) == MODE_PARTIAL_INT - ? MODE_INT : GET_MODE_CLASS (mode)); - - if ((GET_MODE_SIZE (GET_MODE (last_reg)) - >= GET_MODE_SIZE (need_mode)) - && reg_reloaded_contents[i] == regno + if (reg_reloaded_contents[i] == regno && TEST_HARD_REG_BIT (reg_reloaded_valid, i) && HARD_REGNO_MODE_OK (i, rld[r].mode) && (TEST_HARD_REG_BIT (reg_class_contents[(int) rclass], i) -- cgit v1.1