diff options
| author | Aurelien Jarno <aurelien@aurel32.net> | 2012-09-06 16:47:13 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2012-09-11 18:05:55 +0200 |
| commit | 56e4943825e70a45d1fbba4fffa431000c6e1c7a (patch) | |
| tree | a529f814adc7c7f63677fabef6a044b75e789ef0 /tcg/optimize.c | |
| parent | c5cc28ff8feac21b502d64453c9491ff38f5d62d (diff) | |
tcg/optimize: split expression simplification
Split expression simplification in multiple parts so that a given op
can appear multiple times. This patch should not change anything.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'tcg/optimize.c')
| -rw-r--r-- | tcg/optimize.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/tcg/optimize.c b/tcg/optimize.c index 9c65474a8c..63f970d045 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -322,7 +322,7 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, break; } - /* Simplify expression if possible. */ + /* Simplify expression for "op r, a, 0 => mov r, a" cases */ switch (op) { CASE_OP_32_64(add): CASE_OP_32_64(sub): @@ -352,6 +352,12 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, continue; } break; + default: + break; + } + + /* Simplify expression for "op r, a, 0 => movi r, 0" cases */ + switch (op) { CASE_OP_32_64(mul): if ((temps[args[2]].state == TCG_TEMP_CONST && temps[args[2]].val == 0)) { @@ -362,6 +368,12 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, continue; } break; + default: + break; + } + + /* Simplify expression for "op r, a, a => mov r, a" cases */ + switch (op) { CASE_OP_32_64(or): CASE_OP_32_64(and): if (args[1] == args[2]) { |