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[Bug target/62642] x86 rdtsc is moved through barrier
- From: "pinskia at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 01 Sep 2014 18:24:09 +0000
- Subject: [Bug target/62642] x86 rdtsc is moved through barrier
- Auto-submitted: auto-generated
- References: <bug-62642-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62642
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2014-09-01
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The problem shows up in IRA stage.
New iteration of spill/restore move
+++Costs: overall -65521000, reg -65536000, mem 15000, ld 0, st 0, move 0
+++ move loops 0, new jumps 0
scanning new insn with uid = 22.
moving def of 88 (insn 6 now) deleting insn with uid = 21.
deleting insn with uid = 6.
rescanning insn with uid = 22.
22) rather than keep unallocated replacement 93