diff mbox series

Fix ICE in loop splitting

Message ID ZczsuNRrl4ifcjQS@kam.mff.cuni.cz
State New
Headers show
Series Fix ICE in loop splitting | expand

Commit Message

Jan Hubicka Feb. 14, 2024, 4:39 p.m. UTC 
Hi,
as demonstrated in the testcase, I forgot to check that profile is
present in tree-ssa-loop-split.
Bootstrapped and regtested x86_64-linux, comitted.

	PR tree-optimization/111054

gcc/ChangeLog:

	* tree-ssa-loop-split.cc (split_loop): Check for profile being present.

gcc/testsuite/ChangeLog:

	* gcc.c-torture/compile/pr111054.c: New test.
diff mbox series

Patch

diff --git a/gcc/testsuite/gcc.c-torture/compile/pr111054.c b/gcc/testsuite/gcc.c-torture/compile/pr111054.c
new file mode 100644
index 00000000000..3c0d6e816b9
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr111054.c
@@ -0,0 +1,11 @@ 
+/* { dg-additional-options "-fno-guess-branch-probability" } */
+void *p, *q;
+int i, j;
+
+void
+foo (void)
+{
+  for (i = 0; i < 20; i++)
+    if (i < j)
+      p = q;
+}
diff --git a/gcc/tree-ssa-loop-split.cc b/gcc/tree-ssa-loop-split.cc
index 04215fe7937..c0bb1b71d17 100644
--- a/gcc/tree-ssa-loop-split.cc
+++ b/gcc/tree-ssa-loop-split.cc
@@ -712,7 +712,8 @@  split_loop (class loop *loop1)
 			  ? true_edge->probability.to_sreal () : (sreal)1;
 	    sreal scale2 = false_edge->probability.reliable_p ()
 			  ? false_edge->probability.to_sreal () : (sreal)1;
-	    sreal div1 = loop1_prob.to_sreal ();
+	    sreal div1 = loop1_prob.initialized_p ()
+			 ? loop1_prob.to_sreal () : (sreal)1/(sreal)2;
 	    /* +1 to get header interations rather than latch iterations and then
 	       -1 to convert back.  */
 	    if (div1 != 0)