https://gcc.gnu.org/g:f6081ee665fd5e4e7d37e02c69d16df0d3eead10
commit r15-1696-gf6081ee665fd5e4e7d37e02c69d16df0d3eead10
Author: Richard Sandiford <richard.sandif...@arm.com>
Date: Thu Jun 27 14:51:37 2024 +0100
Disable late-combine for -O0 [PR115677]
late-combine relies on df, which for -O0 is only initialised late
(pass_df_initialize_no_opt, after split1). Other df-based passes
cope with this by requiring optimize > 0, so this patch does the
same for late-combine.
gcc/
PR rtl-optimization/115677
* late-combine.cc (pass_late_combine::gate): New function.
Diff:
---
gcc/late-combine.cc | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/gcc/late-combine.cc b/gcc/late-combine.cc
index b7c0bc07a8b..789d734692a 100644
--- a/gcc/late-combine.cc
+++ b/gcc/late-combine.cc
@@ -744,10 +744,16 @@ public:
// opt_pass methods:
opt_pass *clone () override { return new pass_late_combine (m_ctxt); }
- bool gate (function *) override { return flag_late_combine_instructions; }
+ bool gate (function *) override;
unsigned int execute (function *) override;
};
+bool
+pass_late_combine::gate (function *)
+{
+ return optimize > 0 && flag_late_combine_instructions;
+}
+
unsigned int
pass_late_combine::execute (function *fn)
{
