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| author | nickc <nickc@138bc75d-0d04-0410-961f-82ee72b054a4> | 2000-12-22 17:55:09 +0000 |
|---|---|---|
| committer | nickc <nickc@138bc75d-0d04-0410-961f-82ee72b054a4> | 2000-12-22 17:55:09 +0000 |
| commit | 4747ea36f3c48a30809b5a79bcb5f1a0d93c6e4f (patch) | |
| tree | 16de05acdeb9434ab27a174defa99c3269e05804 | |
| parent | 34afc46319a3e760e0a037275e1b4df1856d7f4e (diff) | |
| download | ppe42-gcc-4747ea36f3c48a30809b5a79bcb5f1a0d93c6e4f.tar.gz ppe42-gcc-4747ea36f3c48a30809b5a79bcb5f1a0d93c6e4f.zip | |
Allow the (scratch) frame pointer to be initialised from the stack pointer
plus a constant.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@38466 138bc75d-0d04-0410-961f-82ee72b054a4
| -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 d1568bb8410..35823fab234 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 8c6b6ce5a4b..344fe4d1912 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; |
