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| author | Segher Boessenkool <segher@kernel.crashing.org> | 2016-12-05 14:54:42 +0100 |
|---|---|---|
| committer | Segher Boessenkool <segher@gcc.gnu.org> | 2016-12-05 14:54:42 +0100 |
| commit | a80b4f579a10d01a6cfdfff37150cfccd134dc41 (patch) | |
| tree | 9e5fd3717e2ff5efc41a1cd7f51addd0bc9f4e33 /gcc/combine.c | |
| parent | 519e0faa00bda70c9ffd66b7e7a6011c5e742d2b (diff) | |
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Subject: [PATCH] Revert "Do not simplify "(and (reg) (const bit)" to
if_then_else."
* combine.c: Revert r243162.
From-SVN: r243256
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 7ba634a..b429453 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -5602,18 +5602,6 @@ combine_simplify_rtx (rtx x, machine_mode op0_mode, int in_dest, && OBJECT_P (SUBREG_REG (XEXP (x, 0))))))) { rtx cond, true_rtx, false_rtx; - unsigned HOST_WIDE_INT nz; - - /* If the operation is an AND wrapped in a SIGN_EXTEND or ZERO_EXTEND with - either operand being just a constant single bit value, do nothing since - IF_THEN_ELSE is likely to increase the expression's complexity. */ - if (HWI_COMPUTABLE_MODE_P (mode) - && pow2p_hwi (nz = nonzero_bits (x, mode)) - && ! ((code == SIGN_EXTEND || code == ZERO_EXTEND) - && GET_CODE (XEXP (x, 0)) == AND - && CONST_INT_P (XEXP (XEXP (x, 0), 0)) - && UINTVAL (XEXP (XEXP (x, 0), 0)) == nz)) - return x; cond = if_then_else_cond (x, &true_rtx, &false_rtx); if (cond != 0 |