The P constraint letter is supposed to match every constant which is acceptable during reload. However, constraints do not appear to be able to handle const_wide_int yet. It works with predicates so the alternative is modelled with a new predicate now.
Bootstrapped and regression tested on s390x. Bye, -Andreas- gcc/ChangeLog: 2017-04-24 Andreas Krebbel <kreb...@linux.vnet.ibm.com> * config/s390/predicates.md (reload_const_wide_int_operand): New predicate. * config/s390/s390.md ("movti"): Remove d/P alternative. ("movti_bigconst"): New pattern definition. gcc/testsuite/ChangeLog: 2017-04-24 Andreas Krebbel <kreb...@linux.vnet.ibm.com> * gcc.target/s390/pr79895.c: New test. --- gcc/config/s390/predicates.md | 5 +++++ gcc/config/s390/s390.md | 13 +++++++++++-- gcc/testsuite/gcc.target/s390/pr79895.c | 9 +++++++++ 3 files changed, 25 insertions(+), 2 deletions(-) create mode 100644 gcc/testsuite/gcc.target/s390/pr79895.c diff --git a/gcc/config/s390/predicates.md b/gcc/config/s390/predicates.md index 0c82efc..34a7ea2 100644 --- a/gcc/config/s390/predicates.md +++ b/gcc/config/s390/predicates.md @@ -199,6 +199,11 @@ (and (match_code "const_int") (match_test "INTVAL (op) <= 32767 && INTVAL (op) >= -32768")))) +(define_predicate "reload_const_wide_int_operand" + (and (match_code "const_wide_int") + (match_test "legitimate_reload_constant_p (op)"))) + + ;; operators -------------------------------------------------------------- ;; Return nonzero if OP is a valid comparison operator diff --git a/gcc/config/s390/s390.md b/gcc/config/s390/s390.md index 59f189c..36e2a40 100644 --- a/gcc/config/s390/s390.md +++ b/gcc/config/s390/s390.md @@ -1479,11 +1479,20 @@ ; movti instruction pattern(s). ; + +; Separate out the register pair alternative since constraints (P) are +; not able to deal with const_wide_int's. But predicates do. +(define_insn "*movti_bigconst" + [(set (match_operand:TI 0 "register_operand" "=d") + (match_operand:TI 1 "reload_const_wide_int_operand" ""))] + "TARGET_ZARCH" + "#") + ; FIXME: More constants are possible by enabling jxx, jyy constraints ; for TImode (use double-int for the calculations) (define_insn "movti" - [(set (match_operand:TI 0 "nonimmediate_operand" "=d,S,v, v, v,v,d,v,R, d,o") - (match_operand:TI 1 "general_operand" " S,d,v,j00,jm1,d,v,R,v,dPT,d"))] + [(set (match_operand:TI 0 "nonimmediate_operand" "=d,S,v, v, v,v,d,v,R, d,o") + (match_operand:TI 1 "general_operand" " S,d,v,j00,jm1,d,v,R,v,dT,d"))] "TARGET_ZARCH" "@ lmg\t%0,%N0,%S1 diff --git a/gcc/testsuite/gcc.target/s390/pr79895.c b/gcc/testsuite/gcc.target/s390/pr79895.c new file mode 100644 index 0000000..02374e4 --- /dev/null +++ b/gcc/testsuite/gcc.target/s390/pr79895.c @@ -0,0 +1,9 @@ +/* { dg-do compile { target int128 } } */ +/* { dg-options "-O1 -mno-lra" } */ + +unsigned __int128 g; +void +foo () +{ + g = (unsigned __int128)1 << 127; +} -- 2.9.1