From: Michael Beck <beck@ipd.info.uni-karlsruhe.de>
Date: Tue, 28 Jun 2005 15:08:23 +0000 (+0000)
Subject: added special case to fc_comp() to speed things up
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=eeadb64fa0621f2aa8c2b59db53f280ce67da7c7;p=libfirm

added special case to fc_comp() to speed things up
removed old assert() in tarval_cmp() float case

[r6126]
---

diff --git a/ir/tv/fltcalc.c b/ir/tv/fltcalc.c
index 0cddd6b0d..0dfe0d8d8 100644
--- a/ir/tv/fltcalc.c
+++ b/ir/tv/fltcalc.c
@@ -1393,7 +1393,14 @@ int fc_comp(const void *a, const void *b)
   const char *val_a = (const char*)a;
   const char *val_b = (const char*)b;
 
-  /* unordered */
+  /*
+   * shortcut: if both values are identical, they are either
+   * Unordered if NaN or equal
+   */
+  if (a == b)
+    return _desc(val_a).class == NAN ? 2 : 0;
+
+  /* unordered if one is a NaN */
   if (_desc(val_a).class == NAN || _desc(val_b).class == NAN)
     return 2;
 
diff --git a/ir/tv/tv.c b/ir/tv/tv.c
index 816b38dcb..dc793f63b 100644
--- a/ir/tv/tv.c
+++ b/ir/tv/tv.c
@@ -817,7 +817,7 @@ pn_Cmp tarval_cmp(tarval *a, tarval *b)
        */
       switch (fc_comp(a->value, b->value)) {
         case -1: return pn_Cmp_Lt;
-        case  0: assert(0 && "different tarvals compare equal"); return pn_Cmp_Eq;
+        case  0: return pn_Cmp_Eq;
         case  1: return pn_Cmp_Gt;
         case  2: return pn_Cmp_Uo;
         default: return pn_Cmp_False;