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* [gcc r13-2630] xtensa: Implement new target hook: TARGET_CONSTANT_OK_FOR_CPROP_P
@ 2022-09-12 19:37 Max Filippov
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From: Max Filippov @ 2022-09-12 19:37 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:936efcac733fe49e5ea9e636403e5941f24ff1b3
commit r13-2630-g936efcac733fe49e5ea9e636403e5941f24ff1b3
Author: Takayuki 'January June' Suwa <jjsuwa_sys3175@yahoo.co.jp>
Date: Sun Sep 11 20:51:15 2022 +0900
xtensa: Implement new target hook: TARGET_CONSTANT_OK_FOR_CPROP_P
This patch implements new target hook TARGET_CONSTANT_OK_FOR_CPROP_P in
order to exclude CONST_INTs that cannot fit into a MOVI machine instruction
from cprop.
gcc/ChangeLog:
* config/xtensa/xtensa.cc (TARGET_CONSTANT_OK_FOR_CPROP_P):
New macro definition.
(xtensa_constant_ok_for_cprop_p):
Implement the hook as mentioned above.
Diff:
---
gcc/config/xtensa/xtensa.cc | 20 +++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)
diff --git a/gcc/config/xtensa/xtensa.cc b/gcc/config/xtensa/xtensa.cc
index f1b3331ea55..cc1829d4aba 100644
--- a/gcc/config/xtensa/xtensa.cc
+++ b/gcc/config/xtensa/xtensa.cc
@@ -191,6 +191,7 @@ static bool xtensa_can_eliminate (const int from ATTRIBUTE_UNUSED,
static HOST_WIDE_INT xtensa_starting_frame_offset (void);
static unsigned HOST_WIDE_INT xtensa_asan_shadow_offset (void);
static bool xtensa_function_ok_for_sibcall (tree, tree);
+static bool xtensa_constant_ok_for_cprop_p (const_rtx);
static rtx xtensa_delegitimize_address (rtx);
\f
@@ -345,12 +346,15 @@ static rtx xtensa_delegitimize_address (rtx);
#undef TARGET_HAVE_SPECULATION_SAFE_VALUE
#define TARGET_HAVE_SPECULATION_SAFE_VALUE speculation_safe_value_not_needed
-#undef TARGET_DELEGITIMIZE_ADDRESS
-#define TARGET_DELEGITIMIZE_ADDRESS xtensa_delegitimize_address
-
#undef TARGET_FUNCTION_OK_FOR_SIBCALL
#define TARGET_FUNCTION_OK_FOR_SIBCALL xtensa_function_ok_for_sibcall
+#undef TARGET_CONSTANT_OK_FOR_CPROP_P
+#define TARGET_CONSTANT_OK_FOR_CPROP_P xtensa_constant_ok_for_cprop_p
+
+#undef TARGET_DELEGITIMIZE_ADDRESS
+#define TARGET_DELEGITIMIZE_ADDRESS xtensa_delegitimize_address
+
struct gcc_target targetm = TARGET_INITIALIZER;
\f
@@ -4983,6 +4987,16 @@ xtensa_function_ok_for_sibcall (tree decl ATTRIBUTE_UNUSED, tree exp ATTRIBUTE_U
return true;
}
+/* Implement TARGET_CONSTANT_OK_FOR_CPROP_P. */
+static bool
+xtensa_constant_ok_for_cprop_p (const_rtx x)
+{
+ if (CONST_INT_P (x) && ! xtensa_simm12b (INTVAL (x)))
+ return false;
+
+ return true;
+}
+
static rtx
xtensa_delegitimize_address (rtx op)
{
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