https://gcc.gnu.org/g:e3a7f359c18bf347f6ac8fcda05e9839fac5bd62
commit r15-72-ge3a7f359c18bf347f6ac8fcda05e9839fac5bd62
Author: Andrew Pinski <quic_apin...@quicinc.com>
Date: Wed Apr 17 14:12:17 2024 -0700
Add verification of gimple_assign_nontemporal_move_p [PR112976]
Currently the middle-end only knows how to support temporal stores
(the undocumented storent optab) so let's verify that the only time
we set nontemporal_move on an assign is if the the lhs is not a
gimple reg.
Bootstrapped and tested on x86_64-linux-gnu no regressions.
gcc/ChangeLog:
PR middle-end/112976
* tree-cfg.cc (verify_gimple_assign): Verify that
nontmporal moves are stores.
* gimple.h (struct gimple): Note that only
nontemporal stores are supported.
Signed-off-by: Andrew Pinski <quic_apin...@quicinc.com>
Diff:
---
gcc/gimple.h | 3 ++-
gcc/tree-cfg.cc | 11 +++++++++++
2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/gcc/gimple.h b/gcc/gimple.h
index 8a8ca109bbf..bd315ffc2dd 100644
--- a/gcc/gimple.h
+++ b/gcc/gimple.h
@@ -236,7 +236,8 @@ struct GTY((desc ("gimple_statement_structure (&%h)"), tag
("GSS_BASE"),
for clearing this bit before using it. */
unsigned int visited : 1;
- /* Nonzero if this tuple represents a non-temporal move. */
+ /* Nonzero if this tuple represents a non-temporal move; currently
+ only stores are supported. */
unsigned int nontemporal_move : 1;
/* Pass local flags. These flags are free for any pass to use as
diff --git a/gcc/tree-cfg.cc b/gcc/tree-cfg.cc
index b1ba33018fd..1c5b7df8541 100644
--- a/gcc/tree-cfg.cc
+++ b/gcc/tree-cfg.cc
@@ -4837,6 +4837,17 @@ verify_gimple_assign_single (gassign *stmt)
static bool
verify_gimple_assign (gassign *stmt)
{
+ if (gimple_assign_nontemporal_move_p (stmt))
+ {
+ tree lhs = gimple_assign_lhs (stmt);
+ if (is_gimple_reg (lhs))
+ {
+ error ("nontemporal store's lhs cannot be a gimple register");
+ debug_generic_stmt (lhs);
+ return true;
+ }
+ }
+
switch (gimple_assign_rhs_class (stmt))
{
case GIMPLE_SINGLE_RHS:
