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| author | Bob Wilson <bob.wilson@acm.org> | 2008-08-07 23:44:31 +0000 |
|---|---|---|
| committer | Bob Wilson <bwilson@gcc.gnu.org> | 2008-08-07 23:44:31 +0000 |
| commit | b412869cb2136a22b37d8d838611e6c513b89729 (patch) | |
| tree | 013a34acf7c606a7ab69b75cda286e57c801b81f /gcc | |
| parent | 09828811dcd5e78b9d2f7a239aeef665007a6a8a (diff) | |
| download | gcc-b412869cb2136a22b37d8d838611e6c513b89729.zip gcc-b412869cb2136a22b37d8d838611e6c513b89729.tar.gz gcc-b412869cb2136a22b37d8d838611e6c513b89729.tar.bz2 | |
xtensa.c (xtensa_copy_incoming_a7): Copy incoming value in a6 after the set_frame_ptr insn.
* config/xtensa/xtensa.c (xtensa_copy_incoming_a7): Copy incoming value
in a6 after the set_frame_ptr insn.
From-SVN: r138851
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/xtensa/xtensa.c | 11 |
2 files changed, 14 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ff009ea..8bc0abc 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2008-08-07 Bob Wilson <bob.wilson@acm.org> + + * config/xtensa/xtensa.c (xtensa_copy_incoming_a7): Copy incoming value + in a6 after the set_frame_ptr insn. + 2008-08-07 Richard Henderson <rth@redhat.com> PR debug/37033 diff --git a/gcc/config/xtensa/xtensa.c b/gcc/config/xtensa/xtensa.c index ec84965..0f6bbb5 100644 --- a/gcc/config/xtensa/xtensa.c +++ b/gcc/config/xtensa/xtensa.c @@ -1030,8 +1030,10 @@ xtensa_copy_incoming_a7 (rtx opnd) { case DFmode: case DImode: - emit_insn (gen_movsi_internal (gen_rtx_SUBREG (SImode, tmp, 0), - gen_rtx_REG (SImode, A7_REG - 1))); + /* Copy the value out of A7 here but keep the first word in A6 until + after the set_frame_ptr insn. Otherwise, the register allocator + may decide to put "subreg (tmp, 0)" in A7 and clobber the incoming + value. */ emit_insn (gen_movsi_internal (gen_rtx_SUBREG (SImode, tmp, 4), gen_raw_REG (SImode, A7_REG))); break; @@ -1052,6 +1054,11 @@ xtensa_copy_incoming_a7 (rtx opnd) } cfun->machine->set_frame_ptr_insn = emit_insn (gen_set_frame_ptr ()); + + /* For DF and DI mode arguments, copy the incoming value in A6 now. */ + if (mode == DFmode || mode == DImode) + emit_insn (gen_movsi_internal (gen_rtx_SUBREG (SImode, tmp, 0), + gen_rtx_REG (SImode, A7_REG - 1))); entry_insns = get_insns (); end_sequence (); |