This fixes an ICE in case we use weirdo --param value for
PARAM_ALIGN_THRESHOLD. The patch is by Andrew; I added CL, testcase
and tested.
Bootstrapped/regtested on x86_64-linux, ok for trunk? And what about other
branches?
2013-04-04 Marek Polacek <pola...@redhat.com>
Andrew Pinski <apin...@cavium.com>
PR tree-optimization/48184
* final.c (compute_alignments): Set threshold to 0
if PARAM_ALIGN_THRESHOLD is 0.
* gcc.dg/pr48184.c: New test.
--- gcc/final.c.mp 2013-04-04 14:09:04.626020852 +0200
+++ gcc/final.c 2013-04-04 14:09:05.672024174 +0200
@@ -701,7 +701,10 @@ compute_alignments (void)
FOR_EACH_BB (bb)
if (bb->frequency > freq_max)
freq_max = bb->frequency;
- freq_threshold = freq_max / PARAM_VALUE (PARAM_ALIGN_THRESHOLD);
+ if (PARAM_VALUE (PARAM_ALIGN_THRESHOLD) == 0)
+ freq_threshold = 0;
+ else
+ freq_threshold = freq_max / PARAM_VALUE (PARAM_ALIGN_THRESHOLD);
if (dump_file)
fprintf(dump_file, "freq_max: %i\n",freq_max);
--- gcc/testsuite/gcc.dg/pr48184.c.mp 2013-04-04 13:23:15.356769534 +0200
+++ gcc/testsuite/gcc.dg/pr48184.c 2013-04-04 14:05:05.506241464 +0200
@@ -0,0 +1,5 @@
+/* PR tree-optimization/48184 */
+/* { dg-do compile } */
+/* { dg-options "-O --param align-threshold=0" } */
+
+void foo (void) { }
Marek
