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| author | H.J. Lu <hongjiu.lu@intel.com> | 2018-02-26 15:29:30 +0000 |
|---|---|---|
| committer | H.J. Lu <hjl@gcc.gnu.org> | 2018-02-26 07:29:30 -0800 |
| commit | b9d676b3c0f53504d48bc3f0fe3fec6dbddaed6e (patch) | |
| tree | 853e15f1381e1c82054c7094e406272fdfb7047e /gcc/final.c | |
| parent | 98c26210e2a36a4b379e4a711d34dda92f076acf (diff) | |
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i386: Update -mfunction-return= for return with pop
When -mfunction-return= is used, simple_return_pop_internal should pop
return address into ECX register, adjust stack by bytes to pop from stack
and jump to the return thunk via ECX register.
Tested on i686 and x86-64.
PR target/84530
* config/i386/i386-protos.h (ix86_output_indirect_jmp): Remove
the bool argument.
(ix86_output_indirect_function_return): New prototype.
(ix86_split_simple_return_pop_internal): Likewise.
* config/i386/i386.c (indirect_return_via_cx): New.
(indirect_return_via_cx_bnd): Likewise.
(indirect_thunk_name): Handle return va CX_REG.
(output_indirect_thunk_function): Create alias for
__x86_return_thunk_[re]cx and __x86_return_thunk_[re]cx_bnd.
(ix86_output_indirect_jmp): Remove the bool argument.
(ix86_output_indirect_function_return): New function.
(ix86_split_simple_return_pop_internal): Likewise.
* config/i386/i386.md (*indirect_jump): Don't pass false
to ix86_output_indirect_jmp.
(*tablejump_1): Likewise.
(simple_return_pop_internal): Change it to define_insn_and_split.
Call ix86_split_simple_return_pop_internal to split it for
-mfunction-return=.
(simple_return_indirect_internal): Call
ix86_output_indirect_function_return instead of
ix86_output_indirect_jmp.
gcc/testsuite/
PR target/84530
* gcc.target/i386/ret-thunk-22.c: New test.
* gcc.target/i386/ret-thunk-23.c: Likewise.
* gcc.target/i386/ret-thunk-24.c: Likewise.
* gcc.target/i386/ret-thunk-25.c: Likewise.
* gcc.target/i386/ret-thunk-26.c: Likewise.
From-SVN: r257992
Diffstat (limited to 'gcc/final.c')
0 files changed, 0 insertions, 0 deletions