[ARM] FP16Pat and FullFP16Pat patterns. NFC.

Create and use FP16Pat FullFP16Pat helper patterns to make the difference
explicit.

Differential Revision: https://reviews.llvm.org/D42634


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@323640 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/ARM/ARMInstrFormats.td

@@ -1024,6 +1024,12 @@ class Thumb2DSPPat<dag pattern, dag result> : Pat<pattern, result> {
 class Thumb2DSPMulPat<dag pattern, dag result> : Pat<pattern, result> {
   list<Predicate> Predicates = [IsThumb2, UseMulOps, HasDSP];
 }
+class FP16Pat<dag pattern, dag result> : Pat<pattern, result> {
+  list<Predicate> Predicates = [HasFP16];
+}
+class FullFP16Pat<dag pattern, dag result> : Pat<pattern, result> {
+  list<Predicate> Predicates = [HasFullFP16];
+}
 //===----------------------------------------------------------------------===//
 // Thumb Instruction Format Definitions.
 //

lib/Target/ARM/ARMInstrVFP.td

@@ -674,8 +674,8 @@ def VCVTBHS: ASuI<0b11101, 0b11, 0b0010, 0b01, 0, (outs SPR:$Sd), (ins SPR:$Sm),
                  Requires<[HasFP16]>,
              Sched<[WriteFPCVT]>;
 
-def : Pat<(f32 (fpextend HPR:$Sm)),
-          (VCVTBHS (COPY_TO_REGCLASS HPR:$Sm, SPR))>;
+def : FullFP16Pat<(f32 (fpextend HPR:$Sm)),
+                  (VCVTBHS (COPY_TO_REGCLASS HPR:$Sm, SPR))>;
 
 def VCVTBSH: ASuI<0b11101, 0b11, 0b0011, 0b01, 0, (outs SPR:$Sd), (ins SPR:$Sm),
                  /* FIXME */ IIC_fpCVTHS, "vcvtb", ".f16.f32\t$Sd, $Sm",
@@ -750,17 +750,17 @@ def VCVTTDH : ADuI<0b11101, 0b11, 0b0011, 0b11, 0,
   let Inst{5}     = Dm{4};
 }
 
-def : Pat<(fp_to_f16 SPR:$a),
-          (i32 (COPY_TO_REGCLASS (VCVTBSH SPR:$a), GPR))>;
+def : FP16Pat<(fp_to_f16 SPR:$a),
+              (i32 (COPY_TO_REGCLASS (VCVTBSH SPR:$a), GPR))>;
 
-def : Pat<(fp_to_f16 (f64 DPR:$a)),
-          (i32 (COPY_TO_REGCLASS (VCVTBDH DPR:$a), GPR))>;
+def : FP16Pat<(fp_to_f16 (f64 DPR:$a)),
+              (i32 (COPY_TO_REGCLASS (VCVTBDH DPR:$a), GPR))>;
 
-def : Pat<(f16_to_fp GPR:$a),
-          (VCVTBHS (COPY_TO_REGCLASS GPR:$a, SPR))>;
+def : FP16Pat<(f16_to_fp GPR:$a),
+              (VCVTBHS (COPY_TO_REGCLASS GPR:$a, SPR))>;
 
-def : Pat<(f64 (f16_to_fp GPR:$a)),
-          (VCVTBHD (COPY_TO_REGCLASS GPR:$a, SPR))>;
+def : FP16Pat<(f64 (f16_to_fp GPR:$a)),
+              (VCVTBHD (COPY_TO_REGCLASS GPR:$a, SPR))>;
 
 multiclass vcvt_inst<string opc, bits<2> rm,
                      SDPatternOperator node = null_frag> {