[PATCH] libiberty: d-demangle: use switch instead of if-else

[Luís Ferreira]

This patch allows the compiler to efficiently generate jump tables instead of
using if-else-if.

Signed-off-by: Luís Ferreira <cont...@lsferreira.net>
---
 libiberty/d-demangle.c | 44 +++++++++++++++++++-----------------------
 1 file changed, 20 insertions(+), 24 deletions(-)

diff --git a/libiberty/d-demangle.c b/libiberty/d-demangle.c
index 3adf7b562d1..9748a925371 100644
--- a/libiberty/d-demangle.c
+++ b/libiberty/d-demangle.c
@@ -774,30 +774,26 @@ dlang_type (string *decl, const char *mangled, struct 
dlang_info *info)
       return mangled;
     case 'N':
       mangled++;
-      if (*mangled == 'g') /* wild(T) */
-       {
-         mangled++;
-         string_append (decl, "inout(");
-         mangled = dlang_type (decl, mangled, info);
-         string_append (decl, ")");
-         return mangled;
-       }
-      else if (*mangled == 'h') /* vector(T) */
-       {
-         mangled++;
-         string_append (decl, "__vector(");
-         mangled = dlang_type (decl, mangled, info);
-         string_append (decl, ")");
-         return mangled;
-       }
-      else if (*mangled == 'n') /* typeof(*null) */
-       {
-         mangled++;
-         string_append (decl, "typeof(*null)");
-         return mangled;
-       }
-      else
-       return NULL;
+      switch (*mangled)
+      {
+       case 'g': /* wild(T) */
+           mangled++;
+           string_append (decl, "inout(");
+           mangled = dlang_type (decl, mangled, info);
+           string_append (decl, ")");
+           return mangled;
+       case 'h': /* vector(T) */
+           mangled++;
+           string_append (decl, "__vector(");
+           mangled = dlang_type (decl, mangled, info);
+           string_append (decl, ")");
+           return mangled;
+       case 'n': /* typeof(*null) */
+           mangled++;
+           string_append (decl, "typeof(*null)");
+           return mangled;
+      }
+      return NULL;
     case 'A': /* dynamic array (T[]) */
       mangled++;
       mangled = dlang_type (decl, mangled, info);
-- 
2.33.0