simplify-patfrag.td
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// RUN: llvm-tblgen -gen-dag-isel -I %p/../../include %s 2>&1 | FileCheck %s
include "llvm/Target/Target.td"
// Minimal Target definition
def DemoInstrInfo : InstrInfo;
def Demo : Target {
let InstructionSet = DemoInstrInfo;
}
// Some registers which can hold ints or floats
foreach i = 0-7 in
def "R" # i: Register<"r" # i>;
def GPR : RegisterClass<"Demo", [i32, f32], 32, (sequence "R%u", 0, 7)>;
// Instruction to convert an int to a float
def i2f : Instruction {
let Size = 2;
let OutOperandList = (outs GPR:$dst);
let InOperandList = (ins GPR:$src);
let AsmString = "i2f $dst, $src";
}
// Some kind of special type-conversion node supported by this target
def specialconvert : SDNode<"TEST_TARGET_ISD::SPECIAL_CONVERT", SDTUnaryOp>;
// A PatFrags that matches either bitconvert or the special version
def anyconvert : PatFrags<(ops node:$src),
[(bitconvert node:$src),
(specialconvert node:$src)]>;
// And a rule that matches that PatFrag and turns it into i2f
def : Pat<(f32 (anyconvert (i32 GPR:$val))), (i2f GPR:$val)>;
// CHECK: SwitchOpcode{{.*}}ISD::BITCAST
// CHECK: MorphNodeTo1{{.*}}i2f
// CHECK: SwitchOpcode{{.*}}TEST_TARGET_ISD::SPECIAL_CONVERT
// CHECK: MorphNodeTo1{{.*}}i2f