Hello all:
It is about Bug65804, after this git commit below, the current blackfin
kernel code can not pass building when enable FUNCTION_TRACER.
I want to consult: Is it the original gcc and current kernel issue? or
our related git commit "e52beba PR debug/54694" need be improved?
The related git commit:
commit e52beba9024b5499c5a75929423764b9aa81ffb8
Author: rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed Jan 15 21:41:03 2014 +0000
PR debug/54694
Diagnose frame_pointer_required vs fixed hfp
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@206647 138bc75d-0d04-0410-961f-82ee72b054a4
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c93bf23..075582a 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2014-01-15 Richard Henderson <rth@xxxxxxxxxx>
+
+ PR debug/54694
+ * reginfo.c (global_regs_decl): Globalize.
+ * rtl.h (global_regs_decl): Declare.
+ * ira.c (do_reload): Diagnose frame_pointer_needed and it
+ reserved via global_regs.
+
2014-01-15 Teresa Johnson <tejohnson@xxxxxxxxxx>
* tree-ssa-sccvn.c (visit_reference_op_call): Handle NULL vdef.
diff --git a/gcc/ira.c b/gcc/ira.c
index 41e05f4..ee6010a 100644
--- a/gcc/ira.c
+++ b/gcc/ira.c
@@ -5532,6 +5532,18 @@ do_reload (void)
if (need_dce && optimize)
run_fast_dce ();
+ /* Diagnose uses of the hard frame pointer when it is used as a global
+ register. Often we can get away with letting the user appropriate
+ the frame pointer, but we should let them know when code generation
+ makes that impossible. */
+ if (global_regs[HARD_FRAME_POINTER_REGNUM] && frame_pointer_needed)
+ {
+ tree decl = global_regs_decl[HARD_FRAME_POINTER_REGNUM];
+ error_at (DECL_SOURCE_LOCATION (current_function_decl),
+ "frame pointer required, but reserved");
+ inform (DECL_SOURCE_LOCATION (decl), "for %qD", decl);
+ }
+
timevar_pop (TV_IRA);
}
...
Thanks.
--
Chen Gang (陈刚)
Open, share, and attitude like air, water, and life which God blessed
