Commit 74e32076 by Yao Qi Committed by Yao Qi

arm.c (arm_preferred_rename_class): Implement targethook PREFERRED_RENAME_CLASS.

2010-12-09  Yao Qi  <yao@codesourcery.com>

        * config/arm/arm.c (arm_preferred_rename_class): Implement targethook
        PREFERRED_RENAME_CLASS.

From-SVN: r167626
parent ad632e98
2010-12-09 Yao Qi <yao@codesourcery.com>
* config/arm/arm.c (arm_preferred_rename_class): Implement targethook
PREFERRED_RENAME_CLASS.
2010-12-08 Ian Lance Taylor <iant@google.com>
* doc/sourcebuild.texi (Front End): Remove reference to
......@@ -248,6 +248,7 @@ static bool arm_builtin_support_vector_misalignment (enum machine_mode mode,
int misalignment,
bool is_packed);
static void arm_conditional_register_usage (void);
static reg_class_t arm_preferred_rename_class (reg_class_t class);
/* Table of machine attributes. */
......@@ -585,6 +586,10 @@ static const struct default_options arm_option_optimization_table[] =
#define TARGET_VECTORIZE_SUPPORT_VECTOR_MISALIGNMENT \
arm_builtin_support_vector_misalignment
#undef TARGET_PREFERRED_RENAME_CLASS
#define TARGET_PREFERRED_RENAME_CLASS \
arm_preferred_rename_class
struct gcc_target targetm = TARGET_INITIALIZER;
/* Obstack for minipool constant handling. */
......@@ -23467,4 +23472,16 @@ arm_conditional_register_usage (void)
SUBTARGET_CONDITIONAL_REGISTER_USAGE
}
static reg_class_t
arm_preferred_rename_class (reg_class_t class)
{
/* Thumb-2 instructions using LO_REGS may be smaller than instructions
using GENERIC_REGS. During register rename pass, we prefer LO_REGS,
and code size can be reduced. */
if (TARGET_THUMB2 && class == GENERAL_REGS)
return LO_REGS;
else
return NO_REGS;
}
#include "gt-arm.h"
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