This PR seems to be curable by fixing up the CFG a little earlier.
Bootstrapped and tested on x86_64-linux, and it seems to cure the
testcase with a ppc cross. I'd appreciate if someone ran full ppc tests
with this though. Ok?
Bernd
PR rtl-optimization/79194
* cprop.c (one_cprop_pass): Move deletion of code after unconditional
traps before call to bypass_conditional_jumps.
PR rtl-optimization/79194
* gcc.dg/torture/pr79194.c: New test.
Index: gcc/cprop.c
===================================================================
--- gcc/cprop.c (revision 244817)
+++ gcc/cprop.c (working copy)
@@ -1863,8 +1863,6 @@ one_cprop_pass (void)
}
}
- changed |= bypass_conditional_jumps ();
-
while (!uncond_traps.is_empty ())
{
rtx_insn *insn = uncond_traps.pop ();
@@ -1873,6 +1871,8 @@ one_cprop_pass (void)
emit_barrier_after_bb (to_split);
}
+ changed |= bypass_conditional_jumps ();
+
FREE_REG_SET (reg_set_bitmap);
free_cprop_mem ();
}
Index: gcc/testsuite/gcc.dg/torture/pr79194.c
===================================================================
--- gcc/testsuite/gcc.dg/torture/pr79194.c (nonexistent)
+++ gcc/testsuite/gcc.dg/torture/pr79194.c (working copy)
@@ -0,0 +1,42 @@
+/* { dg-do compile } */
+
+int iw, vr;
+
+void
+d9 (unsigned int j3, long long int f5, int kp)
+{
+ int *qb = &kp;
+
+ if (kp != 0)
+ {
+ long long int oq;
+ unsigned int tl = 0;
+
+ for (j3 = 0; j3 < 1; ++j3)
+ qb = &tl;
+ goto ed;
+
+ l7:
+ oq = 1;
+ while (oq < 2)
+ oq *= j3;
+
+ ed:
+ do
+ {
+ oq -= *qb;
+ if (oq != 0)
+ {
+ long long int ie = j3 & f5;
+ int ws = (j3 != 0 && kp != 0);
+
+ tl = ie > ws;
+ iw = vr = tl;
+ }
+ else
+ tl = (kp != 0 && (0 % 0) != 0); /* { dg-warning "division by zero" } */
+ }
+ while (tl != 0);
+ }
+ goto l7;
+}
