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[ARC] Disable TP register when building for bare metal. 

gcc/
2017-03-27  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/elf.h (ARGET_ARC_TP_REGNO_DEFAULT): Define.
	* config/arc/linux.h (ARGET_ARC_TP_REGNO_DEFAULT): Likewise.
	* config/arc/arc.opt (mtp-regno): Use ARGET_ARC_TP_REGNO_DEFAULT.

From-SVN: r246497
This commit is contained in:
Claudiu Zissulescu 2017-03-27 12:56:24 +02:00 committed by Claudiu Zissulescu
parent ac25518506
commit 81b98ef769
4 changed files with 15 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2017-03-27 Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/elf.h (ARGET_ARC_TP_REGNO_DEFAULT): Define.
* config/arc/linux.h (ARGET_ARC_TP_REGNO_DEFAULT): Likewise.
* config/arc/arc.opt (mtp-regno): Use ARGET_ARC_TP_REGNO_DEFAULT.
2017-03-27 Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/predicates.md (long_immediate_loadstore_operand):

2
gcc/config/arc/arc.opt
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@ -469,7 +469,7 @@ EnumValue
Enum(arc_fpu) String(fpud_all) Value(FPU_FPUD_ALL)
mtp-regno=
Target RejectNegative Joined UInteger Var(arc_tp_regno) Init(25)
Target RejectNegative Joined UInteger Var(arc_tp_regno) Init(TARGET_ARC_TP_REGNO_DEFAULT)
Specify thread pointer register number.
mtp-regno=none

4
gcc/config/arc/elf.h
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@ -53,3 +53,7 @@ along with GCC; see the file COPYING3. If not see
# define MULTILIB_DEFAULTS { "mcpu=" ARC_MULTILIB_CPU_DEFAULT }
# endif
#endif
/* Bare-metal toolchains do not need a thread pointer register. */
#undef TARGET_ARC_TP_REGNO_DEFAULT
#define TARGET_ARC_TP_REGNO_DEFAULT -1

4
gcc/config/arc/linux.h
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@ -74,3 +74,7 @@ along with GCC; see the file COPYING3. If not see
/* We do not have any MULTILIB_OPTIONS specified, so there are no
MULTILIB_DEFAULTS. */
#undef MULTILIB_DEFAULTS
/* Linux toolchains use r25 as the thread pointer register. */
#undef TARGET_ARC_TP_REGNO_DEFAULT
#define TARGET_ARC_TP_REGNO_DEFAULT 25