http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53740
Bug #: 53740
Summary: [4.8 Regression] --enable-checking=yes,rtl bootstrap
failure with ada
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Keywords: ice-checking, ice-on-valid-code
Severity: normal
Priority: P3
Component: debug
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: ja...@gcc.gnu.org
CC: aol...@gcc.gnu.org
Last night my x86_64-linux bootstrap failed due to a RTL checking failure.
.../gnat1 -gnatwa -quiet -nostdinc -O2 -g -gnatpg -m32 -mtune=generic
-march=x86-64 -gnatO s-arit64.o s-arit64.adb -o /tmp/s-arit64.s
ICEs, because in dead_debug_insert_temp during DCE
reg = *DF_REF_REAL_LOC (cur->use);
assigns reg a DEBUG_EXPR rather than REG, so when we later:
/* Hmm... Something's fishy, we should be setting REG here. */
if (REGNO (dest) != REGNO (reg))
breg = NULL;
we ICE, because REGNO on DEBUG_EXPR isn't valid. Alex, could you please look
at it? Not sure if DEBUG_EXPR there is supposed to be valid and we should just
handle it, or if the problem is that some dead_debug* call wasn't called or
didn't do the right job. Thanks.
