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