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| author | Chung-Ju Wu <jasonwucj@gmail.com> | 2014-11-21 05:32:51 +0000 |
|---|---|---|
| committer | Chung-Ju Wu <jasonwucj@gcc.gnu.org> | 2014-11-21 05:32:51 +0000 |
| commit | 47e0e7d28f313ec36e2372dd9e52056581c8014d (patch) | |
| tree | f80b7799c9971d3d47649b328dad55ec9ebcc71f | |
| parent | 7064dcad59b39f4431d9695145ce4c7c7088d992 (diff) | |
| download | gcc-47e0e7d28f313ec36e2372dd9e52056581c8014d.zip gcc-47e0e7d28f313ec36e2372dd9e52056581c8014d.tar.gz gcc-47e0e7d28f313ec36e2372dd9e52056581c8014d.tar.bz2 | |
[NDS32] Create correct CFI info for variadic function arguments.
gcc/
* config/nds32/nds32.c (nds32_emit_stack_push_multiple): Add new
vaarg_p argument and create correct CFI info.
(nds32_expand_prologue): Pass true or false to
nds32_emit_stack_push_multiple function.
From-SVN: r217903
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/config/nds32/nds32.c | 16 |
2 files changed, 20 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index a66af1e..09d1a26 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,12 @@ 2014-11-21 Chung-Ju Wu <jasonwucj@gmail.com> + * config/nds32/nds32.c (nds32_emit_stack_push_multiple): Add new + vaarg_p argument and create correct CFI info. + (nds32_expand_prologue): Pass true or false to + nds32_emit_stack_push_multiple function. + +2014-11-21 Chung-Ju Wu <jasonwucj@gmail.com> + * config/nds32/nds32.c (nds32_expand_prologue): Set fp_adjust_insn as RTX_FRAME_RELATED_P rtx. diff --git a/gcc/config/nds32/nds32.c b/gcc/config/nds32/nds32.c index 156baf2..74ea4e6 100644 --- a/gcc/config/nds32/nds32.c +++ b/gcc/config/nds32/nds32.c @@ -381,7 +381,7 @@ nds32_compute_stack_frame (void) "push registers to memory", "adjust stack pointer". */ static void -nds32_emit_stack_push_multiple (rtx Rb, rtx Re, rtx En4) +nds32_emit_stack_push_multiple (rtx Rb, rtx Re, rtx En4, bool vaarg_p) { int regno; int extra_count; @@ -395,6 +395,7 @@ nds32_emit_stack_push_multiple (rtx Rb, rtx Re, rtx En4) rtx push_rtx; rtx adjust_sp_rtx; rtx parallel_insn; + rtx dwarf; /* We need to provide a customized rtx which contains necessary information for data analysis, @@ -517,6 +518,15 @@ nds32_emit_stack_push_multiple (rtx Rb, rtx Re, rtx En4) We need to use RTX_FRAME_RELATED_P so that GCC is able to generate CFI (Call Frame Information) stuff. */ RTX_FRAME_RELATED_P (parallel_insn) = 1; + + /* Don't use GCC's logic for CFI info if we are generate a push for VAARG + since we will not restore those register at epilogue. */ + if (vaarg_p) + { + dwarf = alloc_reg_note (REG_CFA_ADJUST_CFA, + copy_rtx (adjust_sp_rtx), NULL_RTX); + REG_NOTES (parallel_insn) = dwarf; + } } /* Function to create a parallel rtx pattern @@ -2866,7 +2876,7 @@ nds32_expand_prologue (void) Rb = gen_rtx_REG (SImode, cfun->machine->va_args_first_regno); Re = gen_rtx_REG (SImode, cfun->machine->va_args_last_regno); /* No need to push $fp, $gp, or $lp, so use GEN_INT(0). */ - nds32_emit_stack_push_multiple (Rb, Re, GEN_INT (0)); + nds32_emit_stack_push_multiple (Rb, Re, GEN_INT (0), true); /* We may also need to adjust stack pointer for padding bytes because varargs may cause $sp not 8-byte aligned. */ @@ -2915,7 +2925,7 @@ nds32_expand_prologue (void) if (!(REGNO (Rb) == SP_REGNUM && REGNO (Re) == SP_REGNUM && en4_const == 0)) { /* Create multiple push instruction rtx. */ - nds32_emit_stack_push_multiple (Rb, Re, GEN_INT (en4_const)); + nds32_emit_stack_push_multiple (Rb, Re, GEN_INT (en4_const), false); } /* Check frame_pointer_needed to see |