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| author | Anthony Green <green@moxielogic.com> | 2012-09-08 01:14:22 +0000 |
|---|---|---|
| committer | Anthony Green <green@gcc.gnu.org> | 2012-09-08 01:14:22 +0000 |
| commit | 55a514601b5c2ea174a6413cf1c903663d1fddf5 (patch) | |
| tree | 61caf97457ea6a242f8cffe3fbe95040d4d38e0d | |
| parent | e4d8437d70b94edfcf40b29a417e6aac9d9e9932 (diff) | |
| download | gcc-55a514601b5c2ea174a6413cf1c903663d1fddf5.zip gcc-55a514601b5c2ea174a6413cf1c903663d1fddf5.tar.gz gcc-55a514601b5c2ea174a6413cf1c903663d1fddf5.tar.bz2 | |
Optimize moxie function prologues
From-SVN: r191088
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/config/moxie/moxie.c | 20 |
2 files changed, 22 insertions, 5 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index f78102c..399feaa 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2012-09-07 Anthony Green <green@moxielogic.com> + + * config/moxie/moxie.c (moxie_expand_prologue): Optimize prologue + for functions with large static stack requirements. + (moxie_expand_epilogue): Use $r12 instead of $r5 for pulling saved + values off of the stack. + 2012-09-07 Nick Clifton <nickc@redhat.com> * config/v850/v850.h (DBX_DEBUGGING_INFO): Define. diff --git a/gcc/config/moxie/moxie.c b/gcc/config/moxie/moxie.c index 8d40412..97f8af0 100644 --- a/gcc/config/moxie/moxie.c +++ b/gcc/config/moxie/moxie.c @@ -1,5 +1,5 @@ /* Target Code for moxie - Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation + Copyright (C) 2008, 2009, 2010, 2011, 2012 Free Software Foundation Contributed by Anthony Green. This file is part of GCC. @@ -293,8 +293,8 @@ moxie_expand_prologue (void) if (cfun->machine->size_for_adjusting_sp > 0) { - int i = cfun->machine->size_for_adjusting_sp; - while (i > 255) + int i = cfun->machine->size_for_adjusting_sp; + while ((i >= 255) && (i <= 510)) { insn = emit_insn (gen_subsi3 (stack_pointer_rtx, stack_pointer_rtx, @@ -302,13 +302,23 @@ moxie_expand_prologue (void) RTX_FRAME_RELATED_P (insn) = 1; i -= 255; } - if (i > 0) + if (i <= 255) { insn = emit_insn (gen_subsi3 (stack_pointer_rtx, stack_pointer_rtx, GEN_INT (i))); RTX_FRAME_RELATED_P (insn) = 1; } + else + { + rtx reg = gen_rtx_REG (SImode, MOXIE_R12); + insn = emit_move_insn (reg, GEN_INT (i)); + RTX_FRAME_RELATED_P (insn) = 1; + insn = emit_insn (gen_subsi3 (stack_pointer_rtx, + stack_pointer_rtx, + reg)); + RTX_FRAME_RELATED_P (insn) = 1; + } } } @@ -320,7 +330,7 @@ moxie_expand_epilogue (void) if (cfun->machine->callee_saved_reg_size != 0) { - reg = gen_rtx_REG (Pmode, MOXIE_R5); + reg = gen_rtx_REG (Pmode, MOXIE_R12); if (cfun->machine->callee_saved_reg_size <= 255) { emit_move_insn (reg, hard_frame_pointer_rtx); |