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re PR target/29953 ([SH-4] Perfomance regression in loops. cmp/eq used instead of dt) 

PR target/29953
* config/sh/sh.md (doloop_end): New pattern and splitter.
* loop-iv.c (simple_rhs_p): Check for hardware registers.

From-SVN: r125564
This commit is contained in:
Christian Bruel 2007-06-08 09:58:41 +02:00 committed by Christian Bruel
parent 1fc3998daa
commit 4aa97413d3
3 changed files with 55 additions and 3 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2007-06-08 Christian Bruel <christian.bruel@st.com>
PR target/29953
* config/sh/sh.md (doloop_end): New pattern and splitter.
* loop-iv.c (simple_rhs_p): Check for hardware registers.
2007-06-08 Zdenek Dvorak <dvorakz@suse.cz>
PR middle-end/32209

46
gcc/config/sh/sh.md
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@ -7323,6 +7323,52 @@ label:
? gen_rtx_GE (VOIDmode, operands[4], const0_rtx)
: gen_rtx_GT (VOIDmode, const0_rtx, operands[4]));
}")
; operand 0 is the loop count pseudo register
; operand 1 is the number of loop iterations or 0 if it is unknown
; operand 2 is the maximum number of loop iterations
; operand 3 is the number of levels of enclosed loops
; operand 4 is the label to jump to at the top of the loop
(define_expand "doloop_end"
[(parallel [(set (pc) (if_then_else
(ne:SI (match_operand:SI 0 "" "")
(const_int 1))
(label_ref (match_operand 4 "" ""))
(pc)))
(set (match_dup 0)
(plus:SI (match_dup 0) (const_int -1)))
(clobber (reg:SI T_REG))])]
"TARGET_SH2"
"
{
if (GET_MODE (operands[0]) != SImode)
FAIL;
}
")
(define_insn_and_split "doloop_end_split"
[(set (pc)
(if_then_else (ne:SI (match_operand:SI 0 "arith_reg_dest" "+r")
(const_int 1))
(label_ref (match_operand 1 "" ""))
(pc)))
(set (match_dup 0)
(plus (match_dup 0) (const_int -1)))
(clobber (reg:SI T_REG))]
"TARGET_SH2"
"#"
""
[(parallel [(set (reg:SI T_REG)
(eq:SI (match_operand:SI 0 "arith_reg_dest" "+r")
(const_int 1)))
(set (match_dup 0) (plus:SI (match_dup 0) (const_int -1)))])
(set (pc) (if_then_else (eq (reg:SI T_REG) (const_int 0))
(label_ref (match_operand 1 "" ""))
(pc)))]
""
[(set_attr "type" "cbranch")])
;; ------------------------------------------------------------------------
;; Jump and linkage insns

6
gcc/loop-iv.c
View File

@ -1293,7 +1293,7 @@ simple_rhs_p (rtx rhs)
rtx op0, op1;
if (CONSTANT_P (rhs)
|| REG_P (rhs))
|| (REG_P (rhs) && !HARD_REGISTER_P (rhs)))
return true;
switch (GET_CODE (rhs))
@ -1303,9 +1303,9 @@ simple_rhs_p (rtx rhs)
op0 = XEXP (rhs, 0);
op1 = XEXP (rhs, 1);
/* Allow reg + const sets only. */
if (REG_P (op0) && CONSTANT_P (op1))
if (REG_P (op0) && !HARD_REGISTER_P (op0) && CONSTANT_P (op1))
return true;
if (REG_P (op1) && CONSTANT_P (op0))
if (REG_P (op1) && !HARD_REGISTER_P (op1) && CONSTANT_P (op0))
return true;
return false;