diff options
author | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-12-05 19:32:16 +0000 |
---|---|---|
committer | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-12-05 19:32:16 +0000 |
commit | 923f5d9753ad924d6bb7931170b85141581e181a (patch) | |
tree | 65db31735c6861639ec33f3d20a2191f62c65382 /gcc/resource.c | |
parent | c34db9a547c681b70749402d5bf58f4b89e04eee (diff) | |
download | gcc-923f5d9753ad924d6bb7931170b85141581e181a.tar.gz |
gcc/
* resource.c (init_resource_info): Only consider EXIT_IGNORE_STACK
if there is in epilogue.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@182023 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/resource.c')
-rw-r--r-- | gcc/resource.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/gcc/resource.c b/gcc/resource.c index 1a8cb1be494..e5fa91f778e 100644 --- a/gcc/resource.c +++ b/gcc/resource.c @@ -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) |