OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

re PR rtl-optimization/91136 (incorrect move of instruction to delay slot causes application crash in exception handling)

Browse Source 
PR rtl-optimization/91136
	* df-core.c (ACCESSING REFS): Fix typos in comment.
	* resource.c (mark_target_live_reg): Add artificial defs that occur at
	the beginning of the block to the initial set of live registers.

From-SVN: r273436
This commit is contained in:
Eric Botcazou 2019-07-12 10:15:39 +00:00 committed by Eric Botcazou
parent 831e688af5
commit 49dbd6a032
3 changed files with 14 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2019-07-12 Eric Botcazou <ebotcazou@adacore.com>
PR rtl-optimization/91136
* df-core.c (ACCESSING REFS): Fix typos in comment.
* resource.c (mark_target_live_reg): Add artificial defs that occur at
the beginning of the block to the initial set of live registers.
2019-07-12 Richard Biener <rguenther@suse.de>
* fold-const.h (get_array_ctor_element_at_index): Adjust.

6
gcc/df-core.c
View File

@ -298,12 +298,12 @@ There are 4 ways to obtain access to refs:
Artificial defs and uses occur both at the beginning and ends of blocks.
For blocks that area at the destination of eh edges, the
For blocks that are at the destination of eh edges, the
artificial uses and defs occur at the beginning. The defs relate
to the registers specified in EH_RETURN_DATA_REGNO and the uses
relate to the registers specified in ED_USES. Logically these
relate to the registers specified in EH_USES. Logically these
defs and uses should really occur along the eh edge, but there is
no convenient way to do this. Artificial edges that occur at the
no convenient way to do this. Artificial defs that occur at the
beginning of the block have the DF_REF_AT_TOP flag set.
Artificial uses occur at the end of all blocks. These arise from

4
gcc/resource.c
View File

@ -987,9 +987,13 @@ mark_target_live_regs (rtx_insn *insns, rtx target_maybe_return, struct resource
{
regset regs_live = DF_LR_IN (BASIC_BLOCK_FOR_FN (cfun, b));
rtx_insn *start_insn, *stop_insn;
df_ref def;
/* Compute hard regs live at start of block. */
REG_SET_TO_HARD_REG_SET (current_live_regs, regs_live);
FOR_EACH_ARTIFICIAL_DEF (def, b)
if (DF_REF_FLAGS (def) & DF_REF_AT_TOP)
SET_HARD_REG_BIT (current_live_regs, DF_REF_REGNO (def));
/* Get starting and ending insn, handling the case where each might
be a SEQUENCE. */