The following patch fixes
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64671
The patch was successfully bootstrapped on x86-64.I don't expect that
the patch can result in any trouble.
Committed as rev. 219857.
2015-01-19 Vladimir Makarov <vmaka...@redhat.com>
PR rtl-optimization/64671
* lra-remat.c (operand_to_remat): Don't consider jump and call
insns.
Index: lra-remat.c
===================================================================
--- lra-remat.c (revision 219705)
+++ lra-remat.c (working copy)
@@ -413,6 +413,9 @@ operand_to_remat (rtx_insn *insn)
struct lra_static_insn_data *static_id = id->insn_static_data;
struct lra_insn_reg *reg, *found_reg = NULL;
+ /* Don't rematerialize insns which can change PC. */
+ if (JUMP_P (insn) || CALL_P (insn))
+ return -1;
/* First find a pseudo which can be rematerialized. */
for (reg = id->regs; reg != NULL; reg = reg->next)
/* True FRAME_POINTER_NEEDED might be because we can not follow
