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re PR rtl-optimization/63384 (scheduler loops on endless fence list with -fselective-scheduling2 on x86)

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gcc/

	PR rtl-optimization/63384
	* sel-sched.c (invoke_aftermath_hooks): Do not decrease issue_more
	on DEBUG_INSN_P insns.

testsuite/

	PR rtl-optimization/63384
	* g++.dg/pr63384.C: New test.

From-SVN: r234217
This commit is contained in:
Andrey Belevantsev 2016-03-15 18:25:41 +03:00 committed by Andrey Belevantsev
parent 74ea9ab61b
commit 81fa2944ec
4 changed files with 26 additions and 2 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2016-03-15 Andrey Belevantsev <abel@ispras.ru>
PR rtl-optimization/63384
* sel-sched.c (invoke_aftermath_hooks): Do not decrease issue_more on
DEBUG_INSN_P insns.
2016-03-15 Andrey Belevantsev <abel@ispras.ru>
PR target/64411

5
gcc/sel-sched.c
View File

@ -4262,8 +4262,9 @@ invoke_aftermath_hooks (fence_t fence, rtx_insn *best_insn, int issue_more)
issue_more);
memcpy (FENCE_STATE (fence), curr_state, dfa_state_size);
}
else if (GET_CODE (PATTERN (best_insn)) != USE
&& GET_CODE (PATTERN (best_insn)) != CLOBBER)
else if (!DEBUG_INSN_P (best_insn)
&& GET_CODE (PATTERN (best_insn)) != USE
&& GET_CODE (PATTERN (best_insn)) != CLOBBER)
issue_more--;
return issue_more;

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2016-03-15 Andrey Belevantsev <abel@ispras.ru>
PR rtl-optimization/63384
* g++.dg/pr63384.C: New test.
2016-03-15 Andrey Belevantsev <abel@ispras.ru>
PR target/64411

12
gcc/testsuite/g++.dg/pr63384.C Normal file
View File

@ -0,0 +1,12 @@
/* { dg-do compile { target powerpc*-*-* ia64-*-* i?86-*-* x86_64-*-* } } */
/* { dg-options "-O2 -fselective-scheduling2 -fsel-sched-pipelining -fsel-sched-pipelining-outer-loops -fsel-sched-reschedule-pipelined -fvar-tracking-assignments-toggle -ftree-vectorize" } */
template <class T> T **make_test_matrix() {
T **data = new T *;
for (int i = 0; i < 1000; i++)
;
}
template <typename T> void test() { T **c = make_test_matrix<T>(); }
main() { test<float>(); }