[RISCV] Add hasPostISelHook to sf.vfnrclip pseudo instructions. (llvm#114274)

Add Uses = [FRM] to the underlying MC instructions.
    
Tweak a couple test cases so the MachineVerifier would have caught this.

Author: topperc

llvm/lib/Target/RISCV/RISCVInstrInfoXSf.td

@@ -222,7 +222,8 @@ let Predicates = [HasVendorXSfvfwmaccqqq], DecoderNamespace = "XSfvfwmaccqqq",
   def VFWMACC_4x4x4 : CustomSiFiveVMACC<0b111100, OPFVV, "sf.vfwmacc.4x4x4">;
 }
 
-let Predicates = [HasVendorXSfvfnrclipxfqf], DecoderNamespace = "XSfvfnrclipxfqf" in {
+let Predicates = [HasVendorXSfvfnrclipxfqf], DecoderNamespace = "XSfvfnrclipxfqf",
+    Uses = [FRM] in {
   def VFNRCLIP_XU_F_QF : CustomSiFiveVFNRCLIP<0b100010, OPFVF, "sf.vfnrclip.xu.f.qf">;
   def VFNRCLIP_X_F_QF : CustomSiFiveVFNRCLIP<0b100011, OPFVF, "sf.vfnrclip.x.f.qf">;
 }
@@ -405,7 +406,7 @@ multiclass VPseudoSiFiveVFWMACC<string Constraint = ""> {
 
 multiclass VPseudoSiFiveVFNRCLIP<string Constraint = "@earlyclobber $rd"> {
   foreach i = 0-4 in
-    let hasSideEffects = 0 in
+    let hasSideEffects = 0, hasPostISelHook = 1 in
       defm "Pseudo" # NAME : VPseudoBinaryRoundingMode<MxListW[i].vrclass,
                                                        MxListVF4[i].vrclass,
                                                        FPR32, MxListW[i],

llvm/test/CodeGen/RISCV/rvv/sf_vfnrclip_x_f_qf.ll

@@ -13,18 +13,16 @@ declare <vscale x 1 x i8> @llvm.riscv.sf.vfnrclip.x.f.qf.nxv1i8.nxv1f32.iXLen(
 define <vscale x 1 x i8> @intrinsic_sf_vfnrclip_x_f_qf_nxv1i8_nxv1f32(<vscale x 1 x float> %0, float %1, iXLen %2) nounwind {
 ; CHECK-LABEL: intrinsic_sf_vfnrclip_x_f_qf_nxv1i8_nxv1f32:
 ; CHECK:       # %bb.0: # %entry
-; CHECK-NEXT:    fsrmi a1, 0
 ; CHECK-NEXT:    vsetvli zero, a0, e8, mf8, ta, ma
 ; CHECK-NEXT:    sf.vfnrclip.x.f.qf v9, v8, fa0
-; CHECK-NEXT:    fsrm a1
 ; CHECK-NEXT:    vmv1r.v v8, v9
 ; CHECK-NEXT:    ret
 entry:
   %a = call <vscale x 1 x i8> @llvm.riscv.sf.vfnrclip.x.f.qf.nxv1i8.nxv1f32.iXLen(
     <vscale x 1 x i8> undef,
     <vscale x 1 x float> %0,
     float %1,
-    iXLen 0, iXLen %2)
+    iXLen 7, iXLen %2)
 
   ret <vscale x 1 x i8> %a
 }

llvm/test/CodeGen/RISCV/rvv/sf_vfnrclip_xu_f_qf.ll

@@ -13,18 +13,16 @@ declare <vscale x 1 x i8> @llvm.riscv.sf.vfnrclip.xu.f.qf.nxv1i8.nxv1f32.iXLen(
 define <vscale x 1 x i8> @intrinsic_sf_vfnrclip_xu_f_qf_nxv1i8_nxv1f32(<vscale x 1 x float> %0, float %1, iXLen %2) nounwind {
 ; CHECK-LABEL: intrinsic_sf_vfnrclip_xu_f_qf_nxv1i8_nxv1f32:
 ; CHECK:       # %bb.0: # %entry
-; CHECK-NEXT:    fsrmi a1, 0
 ; CHECK-NEXT:    vsetvli zero, a0, e8, mf8, ta, ma
 ; CHECK-NEXT:    sf.vfnrclip.xu.f.qf v9, v8, fa0
-; CHECK-NEXT:    fsrm a1
 ; CHECK-NEXT:    vmv1r.v v8, v9
 ; CHECK-NEXT:    ret
 entry:
   %a = call <vscale x 1 x i8> @llvm.riscv.sf.vfnrclip.xu.f.qf.nxv1i8.nxv1f32.iXLen(
     <vscale x 1 x i8> undef,
     <vscale x 1 x float> %0,
     float %1,
-    iXLen 0, iXLen %2)
+    iXLen 7, iXLen %2)
 
   ret <vscale x 1 x i8> %a
 }