This patch reverts the previous commit "xtensa: Optimize bitwise splicing
operation" (e3a4bd0bbdccdde0cff85f93064b01a44fb10d2a).
In recent versions of gcc, expressions like '(A & M) | (B & ~M)' are
transformed into '((A ^ B) & M) ^ B' by GIMPLE simplification, so the
existence of that MD pattern is no longer relevant.
gcc/ChangeLog:
* config/xtensa/xtensa.md (*splice_bits):
Remove.
---
gcc/config/xtensa/xtensa.md | 47 -------------------------------------
1 file changed, 47 deletions(-)
diff --git a/gcc/config/xtensa/xtensa.md b/gcc/config/xtensa/xtensa.md
index f22191a61e4..8354ab250a1 100644
--- a/gcc/config/xtensa/xtensa.md
+++ b/gcc/config/xtensa/xtensa.md
@@ -869,53 +869,6 @@
(set_attr "mode" "SI")
(set_attr "length" "3")])
-(define_insn_and_split "*splice_bits"
- [(set (match_operand:SI 0 "register_operand" "=a")
- (ior:SI (and:SI (match_operand:SI 1 "register_operand" "r")
- (match_operand:SI 3 "const_int_operand" ""))
- (and:SI (match_operand:SI 2 "register_operand" "r")
- (match_operand:SI 4 "const_int_operand" ""))))]
-
- "!optimize_debug && optimize
- && INTVAL (operands[3]) + INTVAL (operands[4]) == -1
- && (exact_log2 (INTVAL (operands[3]) + 1) > 16
- || exact_log2 (INTVAL (operands[4]) + 1) > 16)"
- "#"
- "&& can_create_pseudo_p ()"
- [(set (match_dup 5)
- (ashift:SI (match_dup 1)
- (match_dup 4)))
- (set (match_dup 6)
- (lshiftrt:SI (match_dup 2)
- (match_dup 3)))
- (set (match_dup 0)
- (ior:SI (lshiftrt:SI (match_dup 5)
- (match_dup 4))
- (ashift:SI (match_dup 6)
- (match_dup 3))))]
-{
- int shift;
- if (INTVAL (operands[3]) < 0)
- {
- rtx x;
- x = operands[1], operands[1] = operands[2], operands[2] = x;
- x = operands[3], operands[3] = operands[4], operands[4] = x;
- }
- shift = floor_log2 (INTVAL (operands[3]) + 1);
- operands[3] = GEN_INT (shift);
- operands[4] = GEN_INT (32 - shift);
- operands[5] = gen_reg_rtx (SImode);
- operands[6] = gen_reg_rtx (SImode);
-}
- [(set_attr "type" "arith")
- (set_attr "mode" "SI")
- (set (attr "length")
- (if_then_else (match_test "TARGET_DENSITY
- && (INTVAL (operands[3]) == 0x7FFFFFFF
- || INTVAL (operands[4]) == 0x7FFFFFFF)")
- (const_int 11)
- (const_int 12)))])
-
;; Zero-extend instructions.
--
2.39.5
