This patch makes TRULY_NOOP_TRUNCATION take the mode sizes as
poly_uint64s instead of unsigned ints. The function bodies
don't need to change.
2017-10-23 Richard Sandiford <richard.sandif...@linaro.org>
Alan Hayward <alan.hayw...@arm.com>
David Sherwood <david.sherw...@arm.com>
gcc/
* target.def (truly_noop_truncation): Take poly_uint64s instead of
unsigned ints. Change default to hook_bool_puint64_puint64_true.
* doc/tm.texi: Regenerate.
* hooks.h (hook_bool_uint_uint_true): Delete.
(hook_bool_puint64_puint64_true): Declare.
* hooks.c (hook_bool_uint_uint_true): Delete.
(hook_bool_puint64_puint64_true): New function.
* config/mips/mips.c (mips_truly_noop_truncation): Take poly_uint64s
instead of unsigned ints.
* config/spu/spu.c (spu_truly_noop_truncation): Likewise.
* config/tilegx/tilegx.c (tilegx_truly_noop_truncation): Likewise.
Index: gcc/target.def
===================================================================
--- gcc/target.def 2017-10-23 17:00:20.920834919 +0100
+++ gcc/target.def 2017-10-23 17:01:04.215112587 +0100
@@ -3155,8 +3155,8 @@ is correct for most machines.\n\
If @code{TARGET_MODES_TIEABLE_P} returns false for a pair of modes,\n\
suboptimal code can result if this hook returns true for the corresponding\n\
mode sizes. Making this hook return false in such cases may improve things.",
- bool, (unsigned int outprec, unsigned int inprec),
- hook_bool_uint_uint_true)
+ bool, (poly_uint64 outprec, poly_uint64 inprec),
+ hook_bool_puint64_puint64_true)
/* If the representation of integral MODE is such that values are
always sign-extended to a wider mode MODE_REP then return
Index: gcc/doc/tm.texi
===================================================================
--- gcc/doc/tm.texi 2017-10-23 17:00:20.917834257 +0100
+++ gcc/doc/tm.texi 2017-10-23 17:01:04.214113496 +0100
@@ -10823,7 +10823,7 @@ nevertheless truncate the shift count, y
by overriding it.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_TRULY_NOOP_TRUNCATION (unsigned int
@var{outprec}, unsigned int @var{inprec})
+@deftypefn {Target Hook} bool TARGET_TRULY_NOOP_TRUNCATION (poly_uint64
@var{outprec}, poly_uint64 @var{inprec})
This hook returns true if it is safe to ``convert'' a value of
@var{inprec} bits to one of @var{outprec} bits (where @var{outprec} is
smaller than @var{inprec}) by merely operating on it as if it had only
Index: gcc/hooks.h
===================================================================
--- gcc/hooks.h 2017-10-23 16:52:20.369642299 +0100
+++ gcc/hooks.h 2017-10-23 17:01:04.214113496 +0100
@@ -39,7 +39,7 @@ extern bool hook_bool_const_rtx_insn_con
const rtx_insn *);
extern bool hook_bool_mode_uhwi_false (machine_mode,
unsigned HOST_WIDE_INT);
-extern bool hook_bool_uint_uint_true (unsigned int, unsigned int);
+extern bool hook_bool_puint64_puint64_true (poly_uint64, poly_uint64);
extern bool hook_bool_uint_mode_false (unsigned int, machine_mode);
extern bool hook_bool_uint_mode_true (unsigned int, machine_mode);
extern bool hook_bool_tree_false (tree);
Index: gcc/hooks.c
===================================================================
--- gcc/hooks.c 2017-10-23 16:52:20.369642299 +0100
+++ gcc/hooks.c 2017-10-23 17:01:04.214113496 +0100
@@ -133,9 +133,9 @@ hook_bool_mode_uhwi_false (machine_mode,
return false;
}
-/* Generic hook that takes (unsigned int, unsigned int) and returns true. */
+/* Generic hook that takes (poly_uint64, poly_uint64) and returns true. */
bool
-hook_bool_uint_uint_true (unsigned int, unsigned int)
+hook_bool_puint64_puint64_true (poly_uint64, poly_uint64)
{
return true;
}
Index: gcc/config/mips/mips.c
===================================================================
--- gcc/config/mips/mips.c 2017-10-23 17:00:43.528930533 +0100
+++ gcc/config/mips/mips.c 2017-10-23 17:01:04.211116223 +0100
@@ -22322,7 +22322,7 @@ mips_promote_function_mode (const_tree t
/* Implement TARGET_TRULY_NOOP_TRUNCATION. */
static bool
-mips_truly_noop_truncation (unsigned int outprec, unsigned int inprec)
+mips_truly_noop_truncation (poly_uint64 outprec, poly_uint64 inprec)
{
return !TARGET_64BIT || inprec <= 32 || outprec > 32;
}
Index: gcc/config/spu/spu.c
===================================================================
--- gcc/config/spu/spu.c 2017-10-23 17:00:43.548912356 +0100
+++ gcc/config/spu/spu.c 2017-10-23 17:01:04.212115314 +0100
@@ -7182,7 +7182,7 @@ spu_can_change_mode_class (machine_mode
/* Implement TARGET_TRULY_NOOP_TRUNCATION. */
static bool
-spu_truly_noop_truncation (unsigned int outprec, unsigned int inprec)
+spu_truly_noop_truncation (poly_uint64 outprec, poly_uint64 inprec)
{
return inprec <= 32 && outprec <= inprec;
}
Index: gcc/config/tilegx/tilegx.c
===================================================================
--- gcc/config/tilegx/tilegx.c 2017-10-23 17:00:43.551909629 +0100
+++ gcc/config/tilegx/tilegx.c 2017-10-23 17:01:04.213114405 +0100
@@ -5566,7 +5566,7 @@ tilegx_file_end (void)
as sign-extended DI values in registers. */
static bool
-tilegx_truly_noop_truncation (unsigned int outprec, unsigned int inprec)
+tilegx_truly_noop_truncation (poly_uint64 outprec, poly_uint64 inprec)
{
return inprec <= 32 || outprec > 32;
}
