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From: Mike Frysinger <vapier@gentoo.org>
To: gdb-patches@sourceware.org
Subject: [PATCH 3/7] sim: ppc: collapse is_valid switch table more
Date: Thu, 10 Nov 2022 03:01:22 +0700	[thread overview]
Message-ID: <20221109200126.21090-3-vapier@gentoo.org> (raw)
In-Reply-To: <20221109200126.21090-1-vapier@gentoo.org>

Instead of writing:
  case 1:
    return 1;
  case 2:
    return 1;
  ...etc...

Output a single return so we get:
  case 1:
  case 2:
  case ...
    return 1;

This saves ~100 lines of code.  Hopefully the compiler was already
smart enough to optimize to the same code, but if not, this probably
helps there too :).
---
 sim/ppc/dgen.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sim/ppc/dgen.c b/sim/ppc/dgen.c
index 0cc210b5fed1..d2ea922ffc91 100644
--- a/sim/ppc/dgen.c
+++ b/sim/ppc/dgen.c
@@ -240,7 +240,7 @@ gen_spreg_c(spreg_table *table, lf *file)
       for (entry = table->sprs; entry != NULL; entry = entry->next) {
 	lf_printf(file, "  case %d:\n", entry->spreg_nr);
 	if (strcmp(*attribute, "is_valid") == 0)
-	  lf_printf(file, "    return 1;\n");
+	  /* No return -- see below.  */;
 	else if (strcmp(*attribute, "is_readonly") == 0)
 	  lf_printf(file, "    return %d;\n", entry->is_readonly);
 	else if (strcmp(*attribute, "length") == 0)
@@ -248,6 +248,9 @@ gen_spreg_c(spreg_table *table, lf *file)
 	else
 	  ASSERT(0);
       }
+      /* Output a single return for is_valid.  */
+      if (strcmp(*attribute, "is_valid") == 0)
+	lf_printf(file, "    return 1;\n");
       lf_printf(file, "  }\n");
       lf_printf(file, "  return 0;\n");
     }
-- 
2.38.1


  parent reply	other threads:[~2022-11-09 20:01 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-09 20:01 [PATCH 1/7] sim: ppc: constify spreg table Mike Frysinger
2022-11-09 20:01 ` [PATCH 2/7] sim: ppc: pull default switch return out Mike Frysinger
2022-11-09 20:01 ` Mike Frysinger [this message]
2022-11-09 20:01 ` [PATCH 4/7] sim: ppc: collapse is_readonly & length switch tables heavily Mike Frysinger
2022-11-09 20:01 ` [PATCH 5/7] sim: ppc: drop support for dgen -L option Mike Frysinger
2022-11-09 20:01 ` [PATCH 6/7] sim: ppc: change spreg switch table generation to compile-time Mike Frysinger
2022-11-09 20:01 ` [PATCH 7/7] sim: ppc: move spreg.[ch] files to the source tree Mike Frysinger
2022-12-20  1:50   ` [PATCH 1/2] " Mike Frysinger
2022-12-20  1:50     ` [PATCH 2/2] sim: ppc: drop old dgen.c generator Mike Frysinger

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