PHI arguments are indexed by incoming edges. function_instance::match
walked successor edges and could fail gimple_phi_arg_def_from_edge's
destination assertion during afdo_offline.
gcc/ChangeLog:
* auto-profile.cc (function_instance::match): Walk predecessor edges
for PHI arguments.
Regression tested on aarch64-linux-gnu with no new regressions
Signed-off-by: Kugan Vivekanandarajah <[email protected]>
---
gcc/auto-profile.cc | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/gcc/auto-profile.cc b/gcc/auto-profile.cc
index f4562d7f2f98..60f6b1ba480b 100644
--- a/gcc/auto-profile.cc
+++ b/gcc/auto-profile.cc
@@ -1764,7 +1764,8 @@ function_instance::match (cgraph_node *node,
gcc_assert (!info);
dump_stmt (phi, info, NULL, stack);
counts.add (info);
- for (edge e : bb->succs)
+ /* PHI arguments are indexed by incoming (predecessor) edges. */
+ for (edge e : bb->preds)
{
location_t phi_loc
= gimple_phi_arg_location_from_edge (phi, e);
--
2.34.1
