[Bug rtl-optimization/89528] Wrong debug info generated at -Og [gcc-trunk]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89528 Alexandre Oliva changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED --- Comment #6 from Alexandre Oliva --- Fixed
[Bug rtl-optimization/89528] Wrong debug info generated at -Og [gcc-trunk]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89528 --- Comment #5 from Alexandre Oliva --- Author: aoliva Date: Tue Apr 16 12:44:57 2019 New Revision: 270389 URL: https://gcc.gnu.org/viewcvs?rev=270389&root=gcc&view=rev Log: [PR89528] reset debug uses of return value when dropping dead RTL call When we remove an RTL call, we wouldn't clean up references to the return value of the call in debug insns. Make it so that we do. for gcc/ChangeLog PR debug/89528 * valtrack.c (dead_debug_insert_temp): Reset debug references to the return value of a call being removed. for gcc/testsuite/ChangeLog PR debug/89528 * gcc.dg/guality/pr89528.c: New. Added: trunk/gcc/testsuite/gcc.dg/guality/pr89528.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/valtrack.c
[Bug rtl-optimization/89528] Wrong debug info generated at -Og [gcc-trunk]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89528 --- Comment #4 from Alexandre Oliva --- Created attachment 46089 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46089&action=edit candidate patch Here's what I'm testing
[Bug rtl-optimization/89528] Wrong debug info generated at -Og [gcc-trunk]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89528 Alexandre Oliva changed: What|Removed |Added Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |aoliva at gcc dot gnu.org --- Comment #3 from Alexandre Oliva --- DCE drops the dead call to j() after inserting debug temps that reference the return value of the call, but it fails to adjust/reset the debug temp. Looking into how to fix it...
[Bug rtl-optimization/89528] Wrong debug info generated at -Og [gcc-trunk]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89528 Qirun Zhang changed: What|Removed |Added CC||qrzhang at gatech dot edu --- Comment #2 from Qirun Zhang --- Bisection points to r217125.
[Bug rtl-optimization/89528] Wrong debug info generated at -Og [gcc-trunk]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89528 Richard Biener changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed||2019-03-25 Component|debug |rtl-optimization Ever confirmed|0 |1 --- Comment #1 from Richard Biener --- Confirmed, this goes wrong on the RTL side somehow. Breakpoint 2, n () at t.c:13 13 optimize_me_not(); (gdb) disassemble Dump of assembler code for function n: 0x004005ce <+0>: push %rbx => 0x004005cf <+1>: mov$0x0,%eax 0x004005d4 <+6>: callq 0x4005cd while we expand from [local count: 1073741824]: # DEBUG BEGIN_STMT _1 = j (1); l_1127_8 = _1 ^ -65536; # DEBUG l_1127 => l_1127_8 # DEBUG BEGIN_STMT optimize_me_not (); not sure how RTL DCE got rid of the call..
