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| author | Kazu Hirata <kazu@cs.umass.edu> | 2004-02-29 19:18:37 +0000 |
|---|---|---|
| committer | Kazu Hirata <kazu@gcc.gnu.org> | 2004-02-29 19:18:37 +0000 |
| commit | c8574b54f3422f896db9e8b0c00d530b0ea1b9c1 (patch) | |
| tree | 6c519ce5d435d4a04bad8a1a7760435f65810a40 /gcc | |
| parent | 76c88fd97b241bad9412fd73c82084ae9f7652a6 (diff) | |
| download | gcc-c8574b54f3422f896db9e8b0c00d530b0ea1b9c1.zip gcc-c8574b54f3422f896db9e8b0c00d530b0ea1b9c1.tar.gz gcc-c8574b54f3422f896db9e8b0c00d530b0ea1b9c1.tar.bz2 | |
* config/h8300/h8300.md: Add comments about peephole2's.
From-SVN: r78667
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/config/h8300/h8300.md | 74 |
2 files changed, 78 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 9d17775..c778e5a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,9 @@ 2004-02-29 Kazu Hirata <kazu@cs.umass.edu> + * config/h8300/h8300.md: Add comments about peephole2's. + +2004-02-29 Kazu Hirata <kazu@cs.umass.edu> + * config/h8300/h8300.md: Tweak operand numbers of some peephole2's. diff --git a/gcc/config/h8300/h8300.md b/gcc/config/h8300/h8300.md index 2f34481..eede391 100644 --- a/gcc/config/h8300/h8300.md +++ b/gcc/config/h8300/h8300.md @@ -4222,6 +4222,18 @@ ;; Transform ;; +;; cmp.w #1,r0 +;; bhi .L1 +;; +;; into +;; +;; shar.w r0 +;; bne .L1 + +;; TODO: Split the above peephole2. + +;; Transform +;; ;; cmp.w #255,r0 ;; bgt .L1 ;; @@ -4260,6 +4272,18 @@ break; }") +;; Transform +;; +;; cmp.w #255,r0 +;; bhi .L1 +;; +;; into +;; +;; mov.b r0h,r0h +;; bne .L1 + +;; TODO: Split the above peephole2. + ;; (compare (reg:SI) (const_int)) takes 6 bytes, so we try to achieve ;; the equivalent with shorter sequences. Here is the summary. Cases ;; are grouped for each define_peephole2. @@ -4503,6 +4527,19 @@ ;; Transform ;; ;; cmp.l #1,er0 +;; bhi .L1 +;; +;; into +;; +;; mov.l er0,er1 +;; shar.l er1 +;; bne .L1 + +;; TODO: Split the above peephole2. + +;; Transform +;; +;; cmp.l #1,er0 ;; bgt .L1 ;; ;; into @@ -4549,6 +4586,18 @@ ;; Transform ;; +;; cmp.l #1,er0 +;; bhi .L1 +;; +;; into +;; +;; shar.l er0 +;; bne .L1 + +;; TODO: Split the above peephole2. + +;; Transform +;; ;; cmp.l #15,er0 ;; bgt .L1 ;; @@ -4601,6 +4650,19 @@ ;; Transform ;; +;; cmp.l #15,er0 +;; bhi .L1 +;; +;; into +;; +;; and #240,r0l +;; mov.l er0,er0 +;; bne .L1 + +;; TODO: Split the above peephole2. + +;; Transform +;; ;; cmp.l #65535,er0 ;; bgt .L1 ;; @@ -4639,6 +4701,18 @@ break; }") +;; Transform +;; +;; cmp.l #65535,er0 +;; bhi .L1 +;; +;; into +;; +;; mov.l e0,e0 +;; bne .L1 + +;; TODO: Split the above peephole2. + ;; For constants like -1, -2, 1, 2, it is still cheaper to make a copy ;; of the register being tested, do the subtraction on the copy, and ;; then test the copy. We avoid this transformation if we see more |