| FS_OPT_NEUTRAL_0 |
a op 0 = 0 op a = a
|
| FS_OPT_NEUTRAL_1 |
a op 1 = 1 op a = a
|
| FS_OPT_ADD_A_A |
a + a = a * 2
|
| FS_OPT_ADD_A_MINUS_B |
a + -b = a - b
|
| FS_OPT_ADD_SUB |
(a + x) - x = (a - x) + x
|
| FS_OPT_ADD_MUL_A_X_A |
a * x + a = a * (x + 1)
|
| FS_OPT_SUB_0_A |
0 - a = -a
|
| FS_OPT_MINUS_SUB |
|
| FS_OPT_SUB_MINUS |
a - (-b) = a + b
|
| FS_OPT_SUB_MUL_A_X_A |
a * x - a = a * (x - 1)
|
| FS_OPT_SUB_SUB_X_Y_Z |
(x - y) - z = x - (y + z)
|
| FS_OPT_SUB_C_NOT_X |
c - ~a = a + (c+1)
|
| FS_OPT_SUB_TO_ADD |
(-a) - b = -(a + b), a - (b - c) = a + (c - b), a - (b * C) -> a + (b * -C)
|
| FS_OPT_SUB_TO_NOT |
-1 - x -> ~x on two's complement
|
| FS_OPT_SUB_TO_CONV |
a - NULL = (int)a
|
| FS_OPT_MUL_MINUS |
(-a) * (b - c) -> a * (c - b)
|
| FS_OPT_MUL_MINUS_1 |
a * -1 = -a
|
| FS_OPT_MINUS_MUL_C |
(-a) * C = a * (-C)
|
| FS_OPT_MUL_MINUS_MINUS |
(-a) * (-b) = a * b
|
| FS_OPT_OR |
a | a = a | 0 = 0 | a = a
|
| FS_OPT_AND |
a & 0b1...1 = 0b1...1 & a = a & a = a
|
| FS_OPT_TO_EOR |
(a|b) & ~(a&b) = a^b
|
| FS_OPT_EOR_A_A |
a ^ a = 0
|
| FS_OPT_EOR_A_B_A |
(a ^ b) ^ a = b
|
| FS_OPT_EOR_TO_NOT_BOOL |
bool ^ 1 = !bool
|
| FS_OPT_EOR_TO_NOT |
x ^ 0b1..1 = ~x, (a ^ b) & b -> ~a & b
|
| FS_OPT_NOT_CMP |
!(a cmp b) = a !cmp b
|
| FS_OPT_OR_SHFT_TO_ROTL |
(x << c) | (x >> (bits - c)) == Rotl(x, c)
|
| FS_OPT_REASSOC_SHIFT |
(x SHF c1) SHF c2 = x SHF (c1+c2)
|
| FS_OPT_SHIFT_AND |
(a SHF c) AND (b SHF c) = (a AND b) SHF c
|
| FS_OPT_SHIFT_OR |
(a SHF c) OR (b SHF c) = (a OR b) SHF c
|
| FS_OPT_SHIFT_EOR |
(a SHF c) XOR (b SHF c) = (a XOR b) SHF c
|
| FS_OPT_CONV |
a Conv could be removed
|
| FS_OPT_CAST |
a Cast could be removed
|
| FS_OPT_MIN_MAX_EQ |
Min(a,a) = Max(a,a) = a.
|
| FS_OPT_MUX_COMBINE |
two Mux nodes where combined into one
|
| FS_OPT_MUX_CONV |
MuxI(sel, 1, 0) = (I)sel.
|
| FS_OPT_MUX_BOOL |
Muxb(sel, true, false) = sel.
|
| FS_OPT_MUX_NOT_BOOL |
Muxb(sel, false, true) = Not(sel)
|
| FS_OPT_MUX_OR_BOOL |
Muxb(sel, true, x) = Or(sel, x)
|
| FS_OPT_MUX_ORNOT_BOOL |
Muxb(sel, x, true) = Or(Not(sel), x)
|
| FS_OPT_MUX_AND_BOOL |
Muxb(sel, x, false) = And(sel, x)
|
| FS_OPT_MUX_ANDNOT_BOOL |
Muxb(sel, false, x) = And(Not(sel), x)
|
| FS_OPT_MUX_C |
Mux(C, f, t) = C ? t : f.
|
| FS_OPT_MUX_EQ |
Mux(v, x, x) = x.
|
| FS_OPT_MUX_TRANSFORM |
Mux(t ==/!= f, t, f) = f/t, Mux(t ==/!= 0, -t, t) = -t/t.
|
| FS_OPT_MUX_TO_MIN |
Mux(a < b, a, b) = Min(a,b)
|
| FS_OPT_MUX_TO_MAX |
Mux(a > b, a, b) = Max(a,b)
|
| FS_OPT_MUX_TO_BITOP |
Mux((a & 2^x) ==/!= 0, 2^x, 0) = (a & 2^x) (xor 2^x)
|
| FS_OPT_IDEM_UNARY |
Idempotent unary operation.
|
| FS_OPT_MINUS_NOT |
-(~x) = x + 1
|
| FS_OPT_NOT_MINUS_1 |
~(x - 1) = -x
|
| FS_OPT_NOT_PLUS_1 |
~x + 1 = -x
|
| FS_OPT_ADD_X_NOT_X |
~x + x = -1
|
| FS_OPT_FP_INV_MUL |
x / y = x * (1.0/y)
|
| FS_OPT_CONST_PHI |
Constant evaluation on Phi.
|
| FS_OPT_PREDICATE |
Predicate optimization.
|
| FS_OPT_DEMORGAN |
optimization using DeMorgan's law
|
| FS_OPT_CMP_OP_OP |
CMP optimization: Cmp(OP(x), OP(y)) = Cmp(x, y)
|
| FS_OPT_CMP_OP_C |
CMP optimization: Cmp(OP(x), c1) = Cmp(x, c2)
|
| FS_OPT_CMP_CONV_CONV |
CMP optimization: Cmp(Conv(x), Conv(y)) = Cmp(x, y)
|
| FS_OPT_CMP_CONV |
CMP optimization: Cmp(Conv(x), Conv(y)) = Cmp(Conv(x), y)
|
| FS_OPT_CMP_TO_BOOL |
CMP optimization: Cmp(x, y) = BoolOP(x, y)
|
| FS_OPT_CMP_CNST_MAGN |
CMP optimization: reduced magnitude of a const.
|
| FS_OPT_CMP_SHF_TO_AND |
CMP optimization: transformed shift into And.
|
| FS_OPT_CMP_MOD_TO_AND |
CMP optimization: transformed Mod into And.
|
| FS_OPT_NOP |
the operation is a NOP
|
| FS_OPT_GVN_FOLLOWER |
GVN-PRE: replaced a follower.
|
| FS_OPT_GVN_FULLY |
GVN-PRE: replaced by fully redundant value.
|
| FS_OPT_GVN_PARTLY |
GVN-PRE: replaced by partly redundant value.
|
| FS_OPT_COMBO_CONST |
Combo: evaluated into Constant.
|
| FS_OPT_COMBO_CF |
Combo: removed conditional control flow.
|
| FS_OPT_COMBO_FOLLOWER |
Combo: replaced a follower.
|
| FS_OPT_COMBO_CONGRUENT |
Combo: replaced by congruent.
|
| FS_OPT_JUMPTHREADING |
Jump threading: removed conditional control flow.
|
| FS_OPT_RTS_ABS |
RTS optimization: call to abs() replaced.
|
| FS_OPT_RTS_ALLOCA |
RTS optimization: call to alloca() replaced.
|
| FS_OPT_RTS_SQRT |
RTS optimization: call to sqrt() replaced.
|
| FS_OPT_RTS_CBRT |
RTS optimization: call to cbrt() replaced.
|
| FS_OPT_RTS_POW |
RTS optimization: call to pow() replaced.
|
| FS_OPT_RTS_EXP |
RTS optimization: call to exp() replaced.
|
| FS_OPT_RTS_LOG |
RTS optimization: call to log() replaced.
|
| FS_OPT_RTS_SIN |
RTS optimization: call to sin() replaced.
|
| FS_OPT_RTS_COS |
RTS optimization: call to cos() replaced.
|
| FS_OPT_RTS_TAN |
RTS optimization: call to tan() replaced.
|
| FS_OPT_RTS_ASIN |
RTS optimization: call to asin() replaced.
|
| FS_OPT_RTS_ACOS |
RTS optimization: call to acos() replaced.
|
| FS_OPT_RTS_ATAN |
RTS optimization: call to atan() replaced.
|
| FS_OPT_RTS_SINH |
RTS optimization: call to sinh() replaced.
|
| FS_OPT_RTS_COSH |
RTS optimization: call to cosh() replaced.
|
| FS_OPT_RTS_TANH |
RTS optimization: call to tanh() replaced.
|
| FS_OPT_RTS_SYMMETRIC |
RTS optimization: call to symmetric function f(-x) replaced by f(x)
|
| FS_OPT_RTS_STRCMP |
RTS optimization: call to strcmp() replaced.
|
| FS_OPT_RTS_STRNCMP |
RTS optimization: call to strncmp() replaced.
|
| FS_OPT_RTS_STRCPY |
RTS optimization: call to strcpy() replaced.
|
| FS_OPT_RTS_STRLEN |
RTS optimization: call to strlen() replaced.
|
| FS_OPT_RTS_MEMCPY |
RTS optimization: call to memcpy() replaced.
|
| FS_OPT_RTS_MEMPCPY |
RTS optimization: call to mempcpy() replaced.
|
| FS_OPT_RTS_MEMMOVE |
RTS optimization: call to memmove() replaced.
|
| FS_OPT_RTS_MEMSET |
RTS optimization: call to memset() replaced.
|
| FS_OPT_RTS_MEMCMP |
RTS optimization: call to memcmp() replaced.
|
| FS_BE_IA32_LEA |
Lea was created.
|
| FS_BE_IA32_LOAD_LEA |
Load merged with a Lea.
|
| FS_BE_IA32_STORE_LEA |
Store merged with a Lea.
|
| FS_BE_IA32_AM_S |
Source address mode node created.
|
| FS_BE_IA32_AM_D |
Destination address mode node created.
|
| FS_BE_IA32_CJMP |
CJmp created to save a cmp/test.
|
| FS_BE_IA32_2ADDRCPY |
Copy created due to 2-Addresscode constraints.
|
| FS_BE_IA32_SPILL2ST |
Created Store for a Spill.
|
| FS_BE_IA32_RELOAD2LD |
Created Load for a Reload.
|
| FS_BE_IA32_SUB2NEGADD |
Created Neg-Add for a Sub due to 2-Addresscode constraints.
|
| FS_BE_IA32_LEA2ADD |
Transformed Lea back into Add.
|
1.7.4