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| author | Jakub Jelinek <jakub@redhat.com> | 2018-01-27 07:28:15 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2018-01-27 07:28:15 +0100 |
| commit | 0f06be5a06718ce7b670f4ffe9f971a830381757 (patch) | |
| tree | 290979956018e416bfa01a7aab858b2dc3b0627d /gcc | |
| parent | 53723269d6c97ceb61b825006dbfd711a339eb81 (diff) | |
| download | gcc-0f06be5a06718ce7b670f4ffe9f971a830381757.zip gcc-0f06be5a06718ce7b670f4ffe9f971a830381757.tar.gz gcc-0f06be5a06718ce7b670f4ffe9f971a830381757.tar.bz2 | |
re PR middle-end/84040 (compilation time of gcc.c-torture/compile/limits-blockid.c is 50x slower)
PR middle-end/84040
* sched-deps.c (sched_macro_fuse_insns): Return immediately for
debug insns.
From-SVN: r257119
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/sched-deps.c | 8 |
2 files changed, 13 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index bcf3ffd..f2699e0 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2018-01-27 Jakub Jelinek <jakub@redhat.com> + + PR middle-end/84040 + * sched-deps.c (sched_macro_fuse_insns): Return immediately for + debug insns. + 2018-01-26 Jim Wilson <jimw@sifive.com> * config/riscv/riscv.h (MAX_FIXED_MODE_SIZE): New. diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c index 3971861..2d0199d 100644 --- a/gcc/sched-deps.c +++ b/gcc/sched-deps.c @@ -2834,10 +2834,16 @@ static void sched_macro_fuse_insns (rtx_insn *insn) { rtx_insn *prev; + /* No target hook would return true for debug insn as any of the + hook operand, and with very large sequences of only debug insns + where on each we call sched_macro_fuse_insns it has quadratic + compile time complexity. */ + if (DEBUG_INSN_P (insn)) + return; prev = prev_nonnote_nondebug_insn (insn); if (!prev) return; - + if (any_condjump_p (insn)) { unsigned int condreg1, condreg2; |