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| author | Richard Kenner <kenner@gcc.gnu.org> | 1992-09-02 06:37:38 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1992-09-02 06:37:38 -0400 |
| commit | d0dcc580cfd3c8a166c3db09cb46eafa32f32ef4 (patch) | |
| tree | 02227b329f9a198b5a36f5610b618a248c15dca4 /gcc/combine.c | |
| parent | 11f6a29c9fc8f48bb917188c421f25e3a7f71199 (diff) | |
| download | gcc-d0dcc580cfd3c8a166c3db09cb46eafa32f32ef4.zip gcc-d0dcc580cfd3c8a166c3db09cb46eafa32f32ef4.tar.gz gcc-d0dcc580cfd3c8a166c3db09cb46eafa32f32ef4.tar.bz2 | |
(make_compound_operation...
(make_compound_operation, case ASHIFTRT): Add new code to
handle (ashiftrt (neg (ashift FOO C1) C2)) just like we currently
handle (ashiftrt (OP (ashiftrt FOO C1) C2) C2).
From-SVN: r2028
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 2af4949..5d21de3 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -4652,6 +4652,19 @@ make_compound_operation (x, in_code) code == LSHIFTRT, 0, in_code == COMPARE); } + /* Similarly for (ashiftrt (neg (ashift FOO C1)) C2). */ + if (GET_CODE (XEXP (x, 1)) == CONST_INT + && GET_CODE (XEXP (x, 0)) == NEG + && GET_CODE (XEXP (XEXP (x, 0), 0)) == ASHIFT + && GET_CODE (XEXP (XEXP (XEXP (x, 0), 0), 1)) == CONST_INT + && INTVAL (XEXP (x, 1)) >= INTVAL (XEXP (XEXP (XEXP (x, 0), 0), 1))) + new = make_extraction (mode, + gen_unary (GET_CODE (XEXP (x, 0)), mode, + XEXP (XEXP (XEXP (x, 0), 0), 0)), + (INTVAL (XEXP (x, 1)) + - INTVAL (XEXP (XEXP (XEXP (x, 0), 0), 1))), + NULL_RTX, mode_width - INTVAL (XEXP (x, 1)), + code == LSHIFTRT, 0, in_code == COMPARE); break; } |