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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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