The following patch fixes
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88179
The patch was successfully bootstrapped and tested on x86-64.
Committed as rev. 266682.
Index: ChangeLog
===================================================================
--- ChangeLog (revision 266681)
+++ ChangeLog (working copy)
@@ -1,3 +1,9 @@
+2018-11-30 Vladimir Makarov <vmaka...@redhat.com>
+
+ PR rtl-optimization/88179
+ * lra-constraints.c (address_eliminator::address_eliminator):
+ Don't eleminate regs in illegitimate address.
+
2018-11-30 David Malcolm <dmalc...@redhat.com>
PR preprocessor/88257
Index: lra-constraints.c
===================================================================
--- lra-constraints.c (revision 266678)
+++ lra-constraints.c (working copy)
@@ -359,14 +359,20 @@ address_eliminator::address_eliminator (
if (m_base_loc != NULL)
{
m_base_reg = *m_base_loc;
- lra_eliminate_reg_if_possible (m_base_loc);
+ /* If we have non-legitimate address which is decomposed not in
+ the way we expected, don't do elimination here. In such case
+ the address will be reloaded and elimination will be done in
+ reload insn finally. */
+ if (REG_P (m_base_reg))
+ lra_eliminate_reg_if_possible (m_base_loc);
if (m_ad->base_term2 != NULL)
*m_ad->base_term2 = *m_ad->base_term;
}
if (m_index_loc != NULL)
{
m_index_reg = *m_index_loc;
- lra_eliminate_reg_if_possible (m_index_loc);
+ if (REG_P (m_index_reg))
+ lra_eliminate_reg_if_possible (m_index_loc);
}
}
