[gcc/devel/ranger] PR93561 -- [bounds checking] memory overflow for spill_for

[Aldy Hernandez]

https://gcc.gnu.org/g:d26f37a16e3ed3d75a93ffb1da10c44c36a8a36d

commit d26f37a16e3ed3d75a93ffb1da10c44c36a8a36d
Author: Vladimir N. Makarov <vmakarov@redhat.com>
Date:   Thu Feb 6 17:10:58 2020 -0500

    PR93561 -- [bounds checking] memory overflow for spill_for
    
    2020-02-06  <zhongyunde@huawei.com>
                Vladimir Makarov  <vmakarov@redhat.com>
    
            PR rtl-optimization/93561
            * lra-assigns.c (spill_for): Check that tested hard regno is not out of
            hard register range.

Diff:
---
 gcc/ChangeLog     | 7 +++++++
 gcc/lra-assigns.c | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1754aa76399..aec58a06529 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2020-02-06  <zhongyunde@huawei.com>
+  	    Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR rtl-optimization/93561
+	* lra-assigns.c (spill_for): Check that tested hard regno is not out of
+	hard register range.
+
 2020-02-06  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* config/aarch64/aarch64.md (aarch64_movk<mode>): Add a type
diff --git a/gcc/lra-assigns.c b/gcc/lra-assigns.c
index 031ce402c32..40e323c2a64 100644
--- a/gcc/lra-assigns.c
+++ b/gcc/lra-assigns.c
@@ -964,6 +964,8 @@ spill_for (int regno, bitmap spilled_pseudo_bitmap, bool first_p)
       bitmap_clear (&spill_pseudos_bitmap);
       for (j = hard_regno_nregs (hard_regno, mode) - 1; j >= 0; j--)
 	{
+          if (hard_regno + j >= FIRST_PSEUDO_REGISTER)
+	    break;
 	  if (try_hard_reg_pseudos_check[hard_regno + j] != curr_pseudo_check)
 	    continue;
 	  lra_assert (!bitmap_empty_p (&try_hard_reg_pseudos[hard_regno + j]));