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93 lines
2.8 KiB

commit ea2b372d666ec1105abf4ef5418d92d612283e88
Author: law <law@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed Sep 20 05:23:51 2017 +0000
* function.c (dump_stack_clash_frame_info): New function.
* function.h (dump_stack_clash_frame_info): Prototype.
(enum stack_clash_probes): New enum.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@252997 138bc75d-0d04-0410-961f-82ee72b054a4
diff --git a/gcc/function.c b/gcc/function.c
index 76baf307984..9b395aebcb3 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -5263,6 +5263,58 @@ get_arg_pointer_save_area (void)
return ret;
}
+
+/* If debugging dumps are requested, dump information about how the
+ target handled -fstack-check=clash for the prologue.
+
+ PROBES describes what if any probes were emitted.
+
+ RESIDUALS indicates if the prologue had any residual allocation
+ (i.e. total allocation was not a multiple of PROBE_INTERVAL). */
+
+void
+dump_stack_clash_frame_info (enum stack_clash_probes probes, bool residuals)
+{
+ if (!dump_file)
+ return;
+
+ switch (probes)
+ {
+ case NO_PROBE_NO_FRAME:
+ fprintf (dump_file,
+ "Stack clash no probe no stack adjustment in prologue.\n");
+ break;
+ case NO_PROBE_SMALL_FRAME:
+ fprintf (dump_file,
+ "Stack clash no probe small stack adjustment in prologue.\n");
+ break;
+ case PROBE_INLINE:
+ fprintf (dump_file, "Stack clash inline probes in prologue.\n");
+ break;
+ case PROBE_LOOP:
+ fprintf (dump_file, "Stack clash probe loop in prologue.\n");
+ break;
+ }
+
+ if (residuals)
+ fprintf (dump_file, "Stack clash residual allocation in prologue.\n");
+ else
+ fprintf (dump_file, "Stack clash no residual allocation in prologue.\n");
+
+ if (frame_pointer_needed)
+ fprintf (dump_file, "Stack clash frame pointer needed.\n");
+ else
+ fprintf (dump_file, "Stack clash no frame pointer needed.\n");
+
+ if (TREE_THIS_VOLATILE (cfun->decl))
+ fprintf (dump_file,
+ "Stack clash noreturn prologue, assuming no implicit"
+ " probes in caller.\n");
+ else
+ fprintf (dump_file,
+ "Stack clash not noreturn prologue.\n");
+}
+
/* Add a list of INSNS to the hash HASHP, possibly allocating HASHP
for the first time. */
diff --git a/gcc/function.h b/gcc/function.h
index 89d71e592dd..ffea1e564ba 100644
--- a/gcc/function.h
+++ b/gcc/function.h
@@ -712,6 +712,16 @@ extern void instantiate_decl_rtl (rtx x);
and create duplicate blocks. */
extern void reorder_blocks (void);
+enum stack_clash_probes {
+ NO_PROBE_NO_FRAME,
+ NO_PROBE_SMALL_FRAME,
+ PROBE_INLINE,
+ PROBE_LOOP
+};
+
+extern void dump_stack_clash_frame_info (enum stack_clash_probes, bool);
+
+
/* Set BLOCK_NUMBER for all the blocks in FN. */
extern void number_blocks (tree);