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| author | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-08-03 22:57:22 +0000 |
|---|---|---|
| committer | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-08-03 22:57:22 +0000 |
| commit | 2324fa129e50f47e7a2afe04431acb12e1dd9b47 (patch) | |
| tree | a4e798ba3f10202a8a1504f6b63b3e67bf4dd6fc /gcc/config | |
| parent | 0af408f7e9f70d6d9130127f7cc3472bfec50bae (diff) | |
| download | gcc-2324fa129e50f47e7a2afe04431acb12e1dd9b47.tar.gz | |
PR target/34888
* config/avr/avr.md: New splitter for REG_ARGS_SIZE 0.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@177300 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/avr/avr.md | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/config/avr/avr.md b/gcc/config/avr/avr.md index b8560df60d4..b5aa73c55f2 100644 --- a/gcc/config/avr/avr.md +++ b/gcc/config/avr/avr.md @@ -235,6 +235,17 @@ DONE; }) +;; Notice a special-case when adding N to SP where N results in a +;; zero REG_ARGS_SIZE. This is equivalent to a move from FP. +(define_split + [(set (reg:HI REG_SP) (match_operand:HI 0 "register_operand" ""))] + "reload_completed + && frame_pointer_needed + && !cfun->calls_alloca + && find_reg_note (insn, REG_ARGS_SIZE, const0_rtx)" + [(set (reg:HI REG_SP) (reg:HI REG_Y))] + "") + ;;======================================================================== ;; move byte ;; The last alternative (any immediate constant to any register) is |