Add a trapif instruction.

This is a conditional trap controlled by integer CPU flags.
Compare to brif.

lib/cretonne/meta/base/formats.py

@@ -74,6 +74,7 @@ RegFill = InstructionFormat(
 
 Trap = InstructionFormat(trapcode)
 CondTrap = InstructionFormat(VALUE, trapcode)
+IntCondTrap = InstructionFormat(intcc, VALUE, trapcode)
 
 # Finally extract the names of global variables in this module.
 InstructionFormat.extract_names(globals())

lib/cretonne/meta/base/instructions.py

@@ -167,6 +167,15 @@ trapnz = Instruction(
         """,
         ins=(c, code), can_trap=True)
 
+Cond = Operand('Cond', intcc)
+f = Operand('f', iflags)
+
+trapif = Instruction(
+        'trapif', r"""
+        Trap when condition is true in integer CPU flags.
+        """,
+        ins=(Cond, f, code), can_trap=True)
+
 rvals = Operand('rvals', VARIABLE_ARGS, doc='return values')
 
 x_return = Instruction(