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From: "rearnsha at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/42372] [4.5 regression] Regrename reuses non-dead register Date: Wed, 16 Dec 2009 11:12:00 -0000 [thread overview] Message-ID: <20091216111158.30189.qmail@sourceware.org> (raw) In-Reply-To: <bug-42372-10179@http.gcc.gnu.org/bugzilla/> ------- Comment #5 from rearnsha at gcc dot gnu dot org 2009-12-16 11:11 ------- Regrename seems to be starting the scan of bb3 (from the reduced testcase) from somewhere in the middle of the block rather than at the beginning (it's missing at least 2 insns in the reg chain information: Basic block 3: Creating chain ip (0) at insn 71 (mark_write) Closing chain ip (0) at insn 72 (terminate_write) Creating chain ip (1) at insn 72 (mark_write) Closing chain ip (1) at insn 73 (terminate_write) Creating chain ip (2) at insn 73 (mark_write) Closing chain ip (2) at insn 74 (terminate_dead) but BB3 starts at insn 66, not 71 and in insn 68 a value is assigned to r6. However, this never seems to be considered. -- rearnsha at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P3 |P2 Last reconfirmed|2009-12-14 23:37:08 |2009-12-16 11:11:57 date| | Summary|Error: undefined symbol |[4.5 regression] Regrename |`.LPIC7' in operation |reuses non-dead register http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42372
next prev parent reply other threads:[~2009-12-16 11:12 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2009-12-14 22:50 [Bug middle-end/42372] New: Error: undefined symbol `.LPIC7' in operation raj dot khem at gmail dot com 2009-12-14 22:51 ` [Bug middle-end/42372] " raj dot khem at gmail dot com 2009-12-14 23:37 ` ramana at gcc dot gnu dot org 2009-12-15 9:50 ` ramana at gcc dot gnu dot org 2009-12-15 13:33 ` rguenth at gcc dot gnu dot org 2009-12-16 11:12 ` rearnsha at gcc dot gnu dot org [this message] 2009-12-16 19:58 ` [Bug middle-end/42372] [4.5 regression] Regrename reuses non-dead register bernds_cb1 at t-online dot de 2009-12-16 21:27 ` mikpe at it dot uu dot se 2009-12-16 21:30 ` [Bug middle-end/42372] [4.5 Regression] " rguenth at gcc dot gnu dot org 2009-12-16 23:18 ` bernds_cb1 at t-online dot de 2009-12-17 11:47 ` [Bug target/42372] " rearnsha at gcc dot gnu dot org 2009-12-17 11:50 ` rearnsha at gcc dot gnu dot org 2009-12-17 11:51 ` rearnsha at gcc dot gnu dot org
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