Hi!
The following testcase ICEs on powerpc64le-linux. The problem is that
get_vectype_for_scalar_type returns NULL, and while most places in
tree-vect-stmts.c handle that case, this spot doesn't and punts only
if it is non-NULL, but with different number of elts than expected.
Fixed thusly, bootstrapped/regtested on x86_64-linux and i686-linux, ok for
trunk?
2020-01-16 Jakub Jelinek <ja...@redhat.com>
PR tree-optimization/93292
* tree-vect-stmts.c (vectorizable_comparison): Punt also if
get_vectype_for_scalar_type returns NULL.
* g++.dg/opt/pr93292.C: New test.
--- gcc/tree-vect-stmts.c.jj 2020-01-12 11:54:38.522381590 +0100
+++ gcc/tree-vect-stmts.c 2020-01-16 19:42:30.608888882 +0100
@@ -10492,7 +10492,7 @@ vectorizable_comparison (stmt_vec_info s
{
vectype = get_vectype_for_scalar_type (vinfo, TREE_TYPE (rhs1),
slp_node);
- if (maybe_ne (TYPE_VECTOR_SUBPARTS (vectype), nunits))
+ if (!vectype || maybe_ne (TYPE_VECTOR_SUBPARTS (vectype), nunits))
return false;
}
else if (maybe_ne (nunits, TYPE_VECTOR_SUBPARTS (vectype)))
--- gcc/testsuite/g++.dg/opt/pr93292.C.jj 2020-01-16 19:48:51.110144613
+0100
+++ gcc/testsuite/g++.dg/opt/pr93292.C 2020-01-16 19:47:57.351956177 +0100
@@ -0,0 +1,18 @@
+// PR tree-optimization/93292
+// { dg-do compile }
+// { dg-options "-O3 -w" }
+
+struct A {
+ static int foo (float x) { static int b; b = x ? x + 0.5 : 0; return b; }
+};
+
+void
+bar (int *d, float e)
+{
+ float g;
+ for (int h = 0; h < 64; h++)
+ {
+ d[h] += A::foo (g < 0 ? : g > 5 ? : g);
+ A::foo (e);
+ }
+}
Jakub
