From: Geoff Keating <geoffk@cygnus.com>
Date: Mon, 17 Jul 2000 08:41:05 +0000 (+0000)
Subject: simplify-rtx.c (simplify_relational_operation): Two signed values with equal high... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3b15076f3646f5421c5476264b2534182553e8aa;p=gcc.git

simplify-rtx.c (simplify_relational_operation): Two signed values with equal high words are less/greater than each other if...

* simplify-rtx.c (simplify_relational_operation): Two signed
values with equal high words are less/greater than each other if
their low words are less/greater when considered as unsigned.

From-SVN: r35080
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 163e83e6ecd..0d81edd8424 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2000-07-17  Geoffrey Keating  <geoffk@cygnus.com>
+
+	* simplify-rtx.c (simplify_relational_operation): Two signed
+	values with equal high words are less/greater than each other if
+	their low words are less/greater when considered as unsigned.
+
 Mon Jul 17 02:37:06 2000  Marc Espie <espie@openbsd.org>
 
 	* configure.in (vax-*-openbsd):  Change to new style configuration,
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c
index 4a7a3a67861..7426949456d 100644
--- a/gcc/simplify-rtx.c
+++ b/gcc/simplify-rtx.c
@@ -1792,8 +1792,8 @@ simplify_relational_operation (code, mode, op0, op1)
 	}
 
       equal = (h0u == h1u && l0u == l1u);
-      op0lt = (h0s < h1s || (h0s == h1s && l0s < l1s));
-      op1lt = (h1s < h0s || (h1s == h0s && l1s < l0s));
+      op0lt = (h0s < h1s || (h0s == h1s && l0u < l1u));
+      op1lt = (h1s < h0s || (h1s == h0s && l1u < l0u));
       op0ltu = (h0u < h1u || (h0u == h1u && l0u < l1u));
       op1ltu = (h1u < h0u || (h1u == h0u && l1u < l0u));
     }
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 5fd67e3f1a4..6c7e322fef8 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2000-07-17  Geoffrey Keating  <geoffk@cygnus.com>
+
+	* gcc.c-torture/execute/20000717-2.c: New test.
+
 2000-07-17  Joseph S. Myers  <jsm28@cam.ac.uk>
 
 	* gcc.dg/c90-digraph-1.c, gcc.dg/c94-digraph.c,
diff --git a/gcc/testsuite/gcc.c-torture/execute/20000717-2.c b/gcc/testsuite/gcc.c-torture/execute/20000717-2.c
new file mode 100644
index 00000000000..4db9032ec6c
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/20000717-2.c
@@ -0,0 +1,11 @@
+static void
+compare (long long foo)
+{
+  if (foo < 4294967297LL)
+    abort();
+}
+int main(void)
+{
+  compare (8589934591LL);
+  exit (0);
+}