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* [Bug c/95210] New: internal compiler error: in prepare_copy_insn, at gcse.c:1988
@ 2020-05-19 14:01 zhongyunde at tom dot com
2020-05-19 14:49 ` [Bug c/95210] " zhongyunde at tom dot com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: zhongyunde at tom dot com @ 2020-05-19 14:01 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95210
Bug ID: 95210
Summary: internal compiler error: in prepare_copy_insn, at
gcse.c:1988
Product: gcc
Version: 9.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: zhongyunde at tom dot com
Target Milestone: ---
rtx_insn *
prepare_copy_insn (rtx reg, rtx exp)
{
...
else
{
rtx_insn *insn = emit_insn (gen_rtx_SET (reg, exp));
if (insn_invalid_p (insn, false))
gcc_unreachable (); // here is the ICE ...
}
pat = get_insns ();
end_sequence ();
return pat;
}
As the function can_assign_to_reg_without_clobbers_p, we try to check an
temporary insn with regno 'FIRST_PSEUDO_REGISTER * 2'. So in some corner case,
such as a pattern with inout operand, the regno 'FIRST_PSEUDO_REGISTER * 2' is
just equal to the the regno in the REG_EQUAL (FIRST_PSEUDO_REGISTER = 117),
then the temporary insn is valid, but it come fail when alloc another regno for
it, here is this issue.
(set (reg/v:V8HF16 236 )
(unspec: V8HF18 [ (reg: V8HF18 150)
(reg: V8HF18 236)] UNSPEC_MOVTVFM))
(expr_list:REG_EQUAL (unspec: V8HF18 [ (reg: V8HF18 150)
(reg: V8HF18 234)] UNSPEC_MOVTVFM ))
bool
can_assign_to_reg_without_clobbers_p (rtx x, machine_mode mode)
{
....
/* Otherwise, check if we can make a valid insn from it. First initialize
our test insn if we haven't already. */
if (test_insn == 0)
{
test_insn
= make_insn_raw (gen_rtx_SET (gen_rtx_REG (word_mode,
FIRST_PSEUDO_REGISTER * 2),
const0_rtx));
SET_NEXT_INSN (test_insn) = SET_PREV_INSN (test_insn) = 0;
INSN_LOCATION (test_insn) = UNKNOWN_LOCATION;
}
/* Now make an insn like the one we would make when GCSE'ing and see if
valid. */
PUT_MODE (SET_DEST (PATTERN (test_insn)), mode);
SET_SRC (PATTERN (test_insn)) = x;
icode = recog (PATTERN (test_insn), test_insn, &num_clobbers);
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/95210] internal compiler error: in prepare_copy_insn, at gcse.c:1988
2020-05-19 14:01 [Bug c/95210] New: internal compiler error: in prepare_copy_insn, at gcse.c:1988 zhongyunde at tom dot com
@ 2020-05-19 14:49 ` zhongyunde at tom dot com
2020-05-19 17:15 ` [Bug rtl-optimization/95210] " rguenth at gcc dot gnu.org
2020-05-22 6:12 ` zhongyunde at tom dot com
2 siblings, 0 replies; 4+ messages in thread
From: zhongyunde at tom dot com @ 2020-05-19 14:49 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95210
--- Comment #1 from zhongyunde at tom dot com <zhongyunde at tom dot com> ---
patch for this issue.
@ linux-9z2e in ~/software/gcc/gcc on git:master o [23:02:26]
$ git diff
diff --git a/gcc/gcse.c b/gcc/gcse.c
index 8b9518e..65982ec 100644
--- a/gcc/gcse.c
+++ b/gcc/gcse.c
@@ -853,7 +853,7 @@ can_assign_to_reg_without_clobbers_p (rtx x, machine_mode
mode)
{
test_insn
= make_insn_raw (gen_rtx_SET (gen_rtx_REG (word_mode,
- FIRST_PSEUDO_REGISTER * 2),
+ max_regno + 1),
const0_rtx));
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/95210] internal compiler error: in prepare_copy_insn, at gcse.c:1988
2020-05-19 14:01 [Bug c/95210] New: internal compiler error: in prepare_copy_insn, at gcse.c:1988 zhongyunde at tom dot com
2020-05-19 14:49 ` [Bug c/95210] " zhongyunde at tom dot com
@ 2020-05-19 17:15 ` rguenth at gcc dot gnu.org
2020-05-22 6:12 ` zhongyunde at tom dot com
2 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2020-05-19 17:15 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95210
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
testcase?
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/95210] internal compiler error: in prepare_copy_insn, at gcse.c:1988
2020-05-19 14:01 [Bug c/95210] New: internal compiler error: in prepare_copy_insn, at gcse.c:1988 zhongyunde at tom dot com
2020-05-19 14:49 ` [Bug c/95210] " zhongyunde at tom dot com
2020-05-19 17:15 ` [Bug rtl-optimization/95210] " rguenth at gcc dot gnu.org
@ 2020-05-22 6:12 ` zhongyunde at tom dot com
2 siblings, 0 replies; 4+ messages in thread
From: zhongyunde at tom dot com @ 2020-05-22 6:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95210
zhongyunde at tom dot com <zhongyunde at tom dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #3 from zhongyunde at tom dot com <zhongyunde at tom dot com> ---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95267
*** This bug has been marked as a duplicate of bug 95267 ***
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-05-22 6:12 UTC | newest]
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2020-05-19 14:01 [Bug c/95210] New: internal compiler error: in prepare_copy_insn, at gcse.c:1988 zhongyunde at tom dot com
2020-05-19 14:49 ` [Bug c/95210] " zhongyunde at tom dot com
2020-05-19 17:15 ` [Bug rtl-optimization/95210] " rguenth at gcc dot gnu.org
2020-05-22 6:12 ` zhongyunde at tom dot com
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