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tcg/optimize: Optimize bswap

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Somehow we forgot these operations, once upon a time.
This will allow immediate stores to have their bswap
optimized away.

Backports commit 6498594c8eda83c5f5915afc34bd03396f8de6df from qemu
This commit is contained in:
Richard Henderson 2018-12-18 05:49:25 -05:00 committed by Lioncash
parent 1bcbdc2f1b
commit fdb3d6488e
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 12 additions and 0 deletions
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12
qemu/tcg/optimize.c
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@ -355,6 +355,15 @@ static TCGArg do_constant_folding_2(TCGOpcode op, TCGArg x, TCGArg y)
CASE_OP_32_64(ext16u):
return (uint16_t)x;
CASE_OP_32_64(bswap16):
return bswap16(x);
CASE_OP_32_64(bswap32):
return bswap32(x);
case INDEX_op_bswap64_i64:
return bswap64(x);
case INDEX_op_ext_i32_i64:
case INDEX_op_ext32s_i64:
return (int32_t)x;
@ -1104,6 +1113,9 @@ void tcg_optimize(TCGContext *s)
CASE_OP_32_64(ext16s):
CASE_OP_32_64(ext16u):
CASE_OP_32_64(ctpop):
CASE_OP_32_64(bswap16):
CASE_OP_32_64(bswap32):
case INDEX_op_bswap64_i64:
case INDEX_op_ext32s_i64:
case INDEX_op_ext32u_i64:
case INDEX_op_ext_i32_i64: