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| author | H.J. Lu <hongjiu.lu@intel.com> | 2015-12-22 15:38:25 +0000 |
|---|---|---|
| committer | Uros Bizjak <uros@gcc.gnu.org> | 2015-12-22 16:38:25 +0100 |
| commit | af9345d7df615812a078bb942cadd4c317c3e3de (patch) | |
| tree | 50dc8240bb2cdb582ac0bdae2f5b1ce15d0be998 /gcc/tree-inline.c | |
| parent | fda5652f8fe24f637b29608d12fff72e6df08ba9 (diff) | |
| download | gcc-af9345d7df615812a078bb942cadd4c317c3e3de.zip gcc-af9345d7df615812a078bb942cadd4c317c3e3de.tar.gz gcc-af9345d7df615812a078bb942cadd4c317c3e3de.tar.bz2 | |
[PATCH] Use call-clobbered register for sibcall via GOT
From: H.J. Lu <hongjiu.lu@intel.com>
Since sibcall never returns, we can only use call-clobbered register as
GOT base. Otherwise, callee-saved register used as GOT base won't be
properly restored. sibcall_memory_operand is changed to allow 32-bit
GOT slot only with pseudo register as GOT base for RTL expansion. 2
new patterns, *sibcall_GOT_32 and *sibcall_value_GOT_32, are added to
expose GOT base register to register allocator so that call-clobbered
register will be used for GOT base.
gcc/
PR target/68937
* config/i386/i386.c (ix86_function_ok_for_sibcall): Count
call to global function via GOT slot as indirect call.
* config/i386/i386.md (*sibcall_GOT_32): New pattern.
(*sibcall_value_GOT_32): Likewise.
* config/i386/predicates.md (sibcall_memory_operand): Rewrite.
Allow 32-bit GOT slot only with pseudo register as GOT base.
(GOT32_symbol_operand): New predicate.
gcc/testsuite/
PR target/68937
* gcc.target/i386/pr68937-1.c: New test.
* gcc.target/i386/pr68937-2.c: Likewise.
* gcc.target/i386/pr68937-3.c: Likewise.
* gcc.target/i386/pr68937-4.c: Likewise.
* gcc.target/i386/pr68937-5.c: Likewise.
* gcc.target/i386/pr68937-6.c: Likewise.
From-SVN: r231903
Diffstat (limited to 'gcc/tree-inline.c')
0 files changed, 0 insertions, 0 deletions