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re PR rtl-optimization/52804 (IRA/RELOAD allocate wrong register on ARM for cortex-m0) 

PR rtl-optimization/52804
	* reload1.c (reload_reg_reaches_end_p): Check whether successor
	reload with type RELOAD_FOR_INPUT_ADDRESS kills reload register
	of current one with type RELOAD_FOR_INPADDR_ADDRESS.
	Same stands for reloads with type RELOAD_FOR_OUTPUT_ADDRESS and
	RELOAD_FOR_OUTADDR_ADDRESS.

From-SVN: r187139
This commit is contained in:
Bin Cheng 2012-05-04 02:52:27 +00:00 committed by Bin Cheng
parent 2445414102
commit 73292fcf29
2 changed files with 23 additions and 0 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
2012-05-04 Bin Cheng <bin.cheng@arm.com>
PR rtl-optimization/52804
* reload1.c (reload_reg_reaches_end_p): Check whether successor
reload with type RELOAD_FOR_INPUT_ADDRESS kills reload register
of current one with type RELOAD_FOR_INPADDR_ADDRESS.
Same stands for reloads with type RELOAD_FOR_OUTPUT_ADDRESS and
RELOAD_FOR_OUTADDR_ADDRESS.
2012-05-04 Manuel López-Ibáñez <manu@gcc.gnu.org> 2012-05-04 Manuel López-Ibáñez <manu@gcc.gnu.org>
PR c++/24985 PR c++/24985

14
gcc/reload1.c
View File

@ -5429,6 +5429,13 @@ reload_reg_reaches_end_p (unsigned int regno, int reloadnum)
if (TEST_HARD_REG_BIT (reload_reg_used_in_input[i], regno)) if (TEST_HARD_REG_BIT (reload_reg_used_in_input[i], regno))
return 0; return 0;
/* Reload register of reload with type RELOAD_FOR_INPADDR_ADDRESS
could be killed if the register is also used by reload with type
RELOAD_FOR_INPUT_ADDRESS, so check it. */
if (type == RELOAD_FOR_INPADDR_ADDRESS
&& TEST_HARD_REG_BIT (reload_reg_used_in_input_addr[opnum], regno))
return 0;
for (i = opnum + 1; i < reload_n_operands; i++) for (i = opnum + 1; i < reload_n_operands; i++)
if (TEST_HARD_REG_BIT (reload_reg_used_in_input_addr[i], regno) if (TEST_HARD_REG_BIT (reload_reg_used_in_input_addr[i], regno)
|| TEST_HARD_REG_BIT (reload_reg_used_in_inpaddr_addr[i], regno)) || TEST_HARD_REG_BIT (reload_reg_used_in_inpaddr_addr[i], regno))
@ -5503,6 +5510,13 @@ reload_reg_reaches_end_p (unsigned int regno, int reloadnum)
|| TEST_HARD_REG_BIT (reload_reg_used_in_outaddr_addr[i], regno)) || TEST_HARD_REG_BIT (reload_reg_used_in_outaddr_addr[i], regno))
return 0; return 0;
/* Reload register of reload with type RELOAD_FOR_OUTADDR_ADDRESS
could be killed if the register is also used by reload with type
RELOAD_FOR_OUTPUT_ADDRESS, so check it. */
if (type == RELOAD_FOR_OUTADDR_ADDRESS
&& TEST_HARD_REG_BIT (reload_reg_used_in_outaddr_addr[opnum], regno))
return 0;
return 1; return 1;
default: default: