The bug was introduced in f30e9fd33e56a5a721346ea6140722e1b193db42. A variable (cur_locus_e) was incorrectly declared inside a loop. I also moved two other declarations (last and locus) down to make the code more clear.
Tested on x86_64-pc-linux-gnu. gcc/ChangeLog: PR debug/107193 * tree-cfg.cc (assign_discriminators): Move declaration of cur_locus_e out of the loop. --- gcc/tree-cfg.cc | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/gcc/tree-cfg.cc b/gcc/tree-cfg.cc index 41f2925665f..ae781871a19 100644 --- a/gcc/tree-cfg.cc +++ b/gcc/tree-cfg.cc @@ -1204,9 +1204,8 @@ assign_discriminators (void) edge e; edge_iterator ei; gimple_stmt_iterator gsi; - gimple *last = last_stmt (bb); - location_t locus = last ? gimple_location (last) : UNKNOWN_LOCATION; location_t curr_locus = UNKNOWN_LOCATION; + expanded_location curr_locus_e = {}; int curr_discr = 0; /* Traverse the basic block, if two function calls within a basic block @@ -1215,7 +1214,7 @@ assign_discriminators (void) for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) { gimple *stmt = gsi_stmt (gsi); - expanded_location curr_locus_e; + if (curr_locus == UNKNOWN_LOCATION) { curr_locus = gimple_location (stmt); @@ -1238,6 +1237,8 @@ assign_discriminators (void) curr_discr = next_discriminator_for_locus (curr_locus); } + gimple *last = last_stmt (bb); + location_t locus = last ? gimple_location (last) : UNKNOWN_LOCATION; if (locus == UNKNOWN_LOCATION) continue; -- 2.25.1