Use conditional trap on jitted code

[igorsnunes]

See the code snippet below:

0x1f211dd8      lis     r3,16383
0x1f211ddc      ori     r3,r3,65535
0x1f211de0      cmplw   cr1,r11,r3
0x1f211de4      lwz     r12,-26432(r2)
0x1f211de8      nop
0x1f211dec      mtctr   r12
0x1f211df0      nop
0x1f211df4      nop
0x1f211df8      blectr  cr1
0x1f211dfc      trap
0x1f211e00      lwz     r3,44(r31)

The purpose of this chunk of code is to compare register $r3 and $r11. If $r11 is not less or equal $r3 (i.e., greater than) a "trap" exception is executed ($r12 is pointing to 0x1f211e00).

These operations could be substituted by:

lis     r3,16383
ori     r3,r3,65535
tdgt    r11,r3
lwz     r3,44(r31)

Accordingly to the PowerPc64 Isa, Table 130 (trap mnemonics).