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resource.c (init_resource_info): Only consider EXIT_IGNORE_STACK if there is in epilogue. 

gcc/
	* resource.c (init_resource_info): Only consider EXIT_IGNORE_STACK
	if there is in epilogue.

From-SVN: r182023
This commit is contained in:
Richard Sandiford 2011-12-05 19:32:16 +00:00 committed by Richard Sandiford
parent fae67e1dc4
commit dfa51991ef
2 changed files with 14 additions and 9 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2011-12-05 Richard Sandiford <rdsandiford@googlemail.com>
* resource.c (init_resource_info): Only consider EXIT_IGNORE_STACK
if there is in epilogue.
2011-12-05 Richard Sandiford <rdsandiford@googlemail.com>
* optabs.c (maybe_emit_sync_lock_test_and_set): Pass a null target

18
gcc/resource.c
View File

@ -1145,11 +1145,11 @@ init_resource_info (rtx epilogue_insn)
basic_block bb;
/* Indicate what resources are required to be valid at the end of the current
function. The condition code never is and memory always is. If the
frame pointer is needed, it is and so is the stack pointer unless
EXIT_IGNORE_STACK is nonzero. If the frame pointer is not needed, the
stack pointer is. Registers used to return the function value are
needed. Registers holding global variables are needed. */
function. The condition code never is and memory always is.
The stack pointer is needed unless EXIT_IGNORE_STACK is true
and there is an epilogue that restores the original stack pointer
from the frame pointer. Registers used to return the function value
are needed. Registers holding global variables are needed. */
end_of_function_needs.cc = 0;
end_of_function_needs.memory = 1;
@ -1162,11 +1162,11 @@ init_resource_info (rtx epilogue_insn)
#if !HARD_FRAME_POINTER_IS_FRAME_POINTER
SET_HARD_REG_BIT (end_of_function_needs.regs, HARD_FRAME_POINTER_REGNUM);
#endif
if (! EXIT_IGNORE_STACK
|| current_function_sp_is_unchanging)
SET_HARD_REG_BIT (end_of_function_needs.regs, STACK_POINTER_REGNUM);
}
else
if (!(frame_pointer_needed
&& EXIT_IGNORE_STACK
&& epilogue_insn
&& !current_function_sp_is_unchanging))
SET_HARD_REG_BIT (end_of_function_needs.regs, STACK_POINTER_REGNUM);
if (crtl->return_rtx != 0)