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| author | Marcus Shawcroft <marcus.shawcroft@arm.com> | 2014-06-05 11:37:44 +0000 |
|---|---|---|
| committer | Marcus Shawcroft <mshawcroft@gcc.gnu.org> | 2014-06-05 11:37:44 +0000 |
| commit | 348344209225bfbed267e2e0b9fd8d88660b8b4e (patch) | |
| tree | 4f1bc389b20d157fdff3dcba6db61a754449815f /gcc | |
| parent | 98ba74825766921660fec06bba12cd3f3aabcd2a (diff) | |
| download | gcc-348344209225bfbed267e2e0b9fd8d88660b8b4e.zip gcc-348344209225bfbed267e2e0b9fd8d88660b8b4e.tar.gz gcc-348344209225bfbed267e2e0b9fd8d88660b8b4e.tar.bz2 | |
[AArch64] Clarify stack layout comment.
From-SVN: r211268
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/aarch64/aarch64.c | 32 |
2 files changed, 20 insertions, 17 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index be92e0f..e2b8562 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2014-06-05 Marcus Shawcroft <marcus.shawcroft@arm.com> + + * config/aarch64/aarch64.c (aarch64_expand_prologue): Update stack + layout comment. + 2014-06-05 Jaydeep Patil <Jaydeep.Patil@imgtec.com> Prachi Godbole <Prachi.Godbole@imgtec.com> diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index b26e5f5..7c59e8b 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -2078,37 +2078,35 @@ aarch64_save_or_restore_callee_save_registers (HOST_WIDE_INT offset, | | | incoming stack arguments | | | - +-------------------------------+ <-- arg_pointer_rtx - | | + +-------------------------------+ + | | <-- incoming stack pointer (aligned) | callee-allocated save area | | for register varargs | | | - +-------------------------------+ <-- frame_pointer_rtx - | | - | local variables | + +-------------------------------+ + | local variables | <-- frame_pointer_rtx | | +-------------------------------+ | padding0 | \ +-------------------------------+ | - | | | - | | | | callee-saved registers | | frame.saved_regs_size - | | | +-------------------------------+ | | LR' | | +-------------------------------+ | - | FP' | / - P +-------------------------------+ <-- hard_frame_pointer_rtx + | FP' | / <- hard_frame_pointer_rtx (aligned) + +-------------------------------+ | dynamic allocation | +-------------------------------+ - | | - | outgoing stack arguments | - | | - +-------------------------------+ <-- stack_pointer_rtx + | padding | + +-------------------------------+ + | outgoing stack arguments | <-- arg_pointer + | | + +-------------------------------+ + | | <-- stack_pointer_rtx (aligned) - Dynamic stack allocations such as alloca insert data at point P. - They decrease stack_pointer_rtx but leave frame_pointer_rtx and - hard_frame_pointer_rtx unchanged. */ + Dynamic stack allocations via alloca() decrease stack_pointer_rtx + but leave frame_pointer_rtx and hard_frame_pointer_rtx + unchanged. */ /* Generate the prologue instructions for entry into a function. Establish the stack frame by decreasing the stack pointer with a |