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| author | Nick Clifton <nickc@redhat.com> | 2000-12-22 17:55:09 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@gcc.gnu.org> | 2000-12-22 17:55:09 +0000 |
| commit | b53ef1a25fb257dac1b951f9f1c440a97ce39bbc (patch) | |
| tree | 16de05acdeb9434ab27a174defa99c3269e05804 /gcc | |
| parent | 8230f5e2360186709b8c39c089be9492081cd8d7 (diff) | |
| download | gcc-b53ef1a25fb257dac1b951f9f1c440a97ce39bbc.zip gcc-b53ef1a25fb257dac1b951f9f1c440a97ce39bbc.tar.gz gcc-b53ef1a25fb257dac1b951f9f1c440a97ce39bbc.tar.bz2 | |
Allow the (scratch) frame pointer to be initialised from the stack pointer
plus a constant.
From-SVN: r38466
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/dwarf2out.c | 29 |
2 files changed, 26 insertions, 9 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d1568bb..35823fa 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2000-12-22 Nick Clifton <nickc@redhat.com> + + * dwarf2out_frame_debug_expr: Allow the (scratch) frame + pointer to be initialised from the stack pointer plus a + constant. + 2000-12-22 Bernd Schmidt <bernds@redhat.com> * regrename.c (struct du_chain): New field "earlyclobber". diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c index 8c6b6ce..344fe4d 100644 --- a/gcc/dwarf2out.c +++ b/gcc/dwarf2out.c @@ -1355,16 +1355,27 @@ dwarf2out_frame_debug_expr (expr, label) } else { - if (GET_CODE (src) != PLUS - || XEXP (src, 1) != stack_pointer_rtx) + if (GET_CODE (src) != PLUS) abort (); - if (GET_CODE (XEXP (src, 0)) != REG - || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp_reg) - abort (); - if (cfa.reg != STACK_POINTER_REGNUM) - abort (); - cfa_store.reg = REGNO (dest); - cfa_store.offset = cfa.offset - cfa_temp_value; + + if (GET_CODE (XEXP (src, 0)) == REG + && REGNO (XEXP (src, 0)) == cfa.reg + && GET_CODE (XEXP (src, 1)) == CONST_INT) + /* Setting the FP (or a scratch that will be copied into the FP + later on) from SP + const. */ + cfa.reg = REGNO (dest); + else + { + if (XEXP (src, 1) != stack_pointer_rtx) + abort (); + if (GET_CODE (XEXP (src, 0)) != REG + || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp_reg) + abort (); + if (cfa.reg != STACK_POINTER_REGNUM) + abort (); + cfa_store.reg = REGNO (dest); + cfa_store.offset = cfa.offset - cfa_temp_value; + } } break; |