The attached change fixes PR target/5379. ICE occurs when reload tries
to emit a move instruction containing a TLS symbol reference as the source
operand. This requires several scratch registers. As a result, it isn't
possible for a reload pattern to handle this case. So, the best solution
was to reject TLS symbol reference source operands after reload starts.
Tested on hppa-unknown-linux-gnu and hppa2.0w-hp-hpux11.11 with not observed
regressions.
Committed to all active branches.
Dave
--
J. David Anglin dave.ang...@nrc-cnrc.gc.ca
National Research Council of Canada (613) 990-0752 (FAX: 952-6602)
2012-12-25 John David Anglin <dave.ang...@nrc-cnrc.gc.ca>
PR target/53789
* config/pa/pa.md (movsi): Reject expansion of TLS symbol references
after reload starts.
Index: config/pa/pa.md
===================================================================
--- config/pa/pa.md (revision 194709)
+++ config/pa/pa.md (working copy)
@@ -2051,6 +2110,12 @@
""
"
{
+ /* A TLS symbol reference is not a valid move source operand.
+ pa_emit_move_sequence can only handle them prior to reload.
+ There is also no way to reload a TLS symbol reference, so
+ we must reject them after reload starts. */
+ if (PA_SYMBOL_REF_TLS_P (operands[1]) && !can_create_pseudo_p ())
+ FAIL;
if (pa_emit_move_sequence (operands, SImode, 0))
DONE;
}")
