+2003-10-20 Falk Hueffner <falk@debian.org>
+
+ PR target/12654
+ * config/alpha/alpha.c (alpha_emit_conditional_branch): Don't do
+ comparison against constant by adjusting the argument except for
+ EQ and NE.
+
2003-10-19 Mark Mitchell <mark@codesourcery.com>
* config.gcc: Add support for arm926ejs, arm1026ejs, arm1136js,
if (op1 == const0_rtx)
cmp_code = NIL, branch_code = code;
- /* We want to use cmpcc/bcc when we can, since there is a zero delay
- bypass between logicals and br/cmov on EV5. But we don't want to
- force valid immediate constants into registers needlessly. */
- else if (GET_CODE (op1) == CONST_INT)
+ /* If the constants doesn't fit into an immediate, but can
+ be generated by lda/ldah, we adjust the argument and
+ compare against zero, so we can use beq/bne directly. */
+ else if (GET_CODE (op1) == CONST_INT && (code == EQ || code == NE))
{
HOST_WIDE_INT v = INTVAL (op1), n = -v;
--- /dev/null
+/* PR target/12654
+ The Alpha backend tried to do a >= 1024 as (a - 1024) >= 0, which fails
+ for very large negative values. */
+/* Origin: tg@swox.com */
+
+#include <limits.h>
+
+extern void abort (void);
+
+void __attribute__((noinline))
+foo (long x)
+{
+ if (x >= 1024)
+ abort ();
+}
+
+int
+main ()
+{
+ foo (LONG_MIN);
+ foo (LONG_MIN + 10000);
+ return 0;
+}