From bc6ce33429e1ab0818366de28189d7b17900d46a Mon Sep 17 00:00:00 2001 From: Andreas Krebbel Date: Fri, 4 Mar 2011 20:47:11 +0000 Subject: [PATCH] s390.c (s390_decompose_address): Reject non-literal pool references in UNSPEC_LTREL_OFFSET. 2011-03-04 Andreas Krebbel * config/s390/s390.c (s390_decompose_address): Reject non-literal pool references in UNSPEC_LTREL_OFFSET. From-SVN: r170685 --- gcc/ChangeLog | 5 +++++ gcc/config/s390/s390.c | 10 ++++++++++ 2 files changed, 15 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6b8dc6467ec..76a2bd2b8e9 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2011-03-04 Andreas Krebbel + + * config/s390/s390.c (s390_decompose_address): Reject non-literal + pool references in UNSPEC_LTREL_OFFSET. + 2011-03-04 Jan Hubicka PR lto/47497 diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c index f43b3765032..3e6edb76b47 100644 --- a/gcc/config/s390/s390.c +++ b/gcc/config/s390/s390.c @@ -2065,6 +2065,16 @@ s390_decompose_address (rtx addr, struct s390_address *out) else if (GET_CODE (disp) == UNSPEC && XINT (disp, 1) == UNSPEC_LTREL_OFFSET) { + /* In case CSE pulled a non literal pool reference out of + the pool we have to reject the address. This is + especially important when loading the GOT pointer on non + zarch CPUs. In this case the literal pool contains an lt + relative offset to the _GLOBAL_OFFSET_TABLE_ label which + will most likely exceed the displacement. */ + if (GET_CODE (XVECEXP (disp, 0, 0)) != SYMBOL_REF + || !CONSTANT_POOL_ADDRESS_P (XVECEXP (disp, 0, 0))) + return false; + orig_disp = gen_rtx_CONST (Pmode, disp); if (offset) { -- 2.30.2