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[Bug target/66232] -fPIC -fno-plt -mx32 fails to generate indirect branch via GOT
- From: "hjl at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 21 May 2015 21:59:28 +0000
- Subject: [Bug target/66232] -fPIC -fno-plt -mx32 fails to generate indirect branch via GOT
- Auto-submitted: auto-generated
- References: <bug-66232-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66232
--- Comment #4 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Thu May 21 21:58:57 2015
New Revision: 223505
URL: https://gcc.gnu.org/viewcvs?rev=223505&root=gcc&view=rev
Log:
Allow indirect branch via GOT slot for x32
X32 doesn't support indirect branch via 32-bit memory slot since
indirect branch will load 64-bit address from 64-bit memory slot.
Since x32 GOT slot is 64-bit, we should allow indirect branch via GOT
slot for x32.
gcc/
PR target/66232
* config/i386/constraints.md (Bg): New constraint for GOT memory
operand.
* config/i386/i386.md (*call_got_x32): New pattern.
(*call_value_got_x32): Likewise.
* config/i386/predicates.md (GOT_memory_operand): New predicate.
gcc/testsuite/
PR target/66232
* gcc.target/i386/pr66232-1.c: New test.
* gcc.target/i386/pr66232-2.c: Likewise.
* gcc.target/i386/pr66232-3.c: Likewise.
* gcc.target/i386/pr66232-4.c: Likewise.
* gcc.target/i386/pr66232-5.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr66232-1.c
trunk/gcc/testsuite/gcc.target/i386/pr66232-2.c
trunk/gcc/testsuite/gcc.target/i386/pr66232-3.c
trunk/gcc/testsuite/gcc.target/i386/pr66232-4.c
trunk/gcc/testsuite/gcc.target/i386/pr66232-5.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/constraints.md
trunk/gcc/config/i386/i386.md
trunk/gcc/config/i386/predicates.md
trunk/gcc/testsuite/ChangeLog