Revert "Revert r339977: [GISel]: Add Opcodes for a few LLVM Intrinsics"

This reverts commit 7debc33.

I missed updating legalizer-info-validation.mir as I had assertions
turned off in my build and that specific test requires asserts. Fixed it
now.

llvm-svn: 340197

Author: Aditya Nandakumar

llvm/include/llvm/Support/TargetOpcodes.def

@@ -268,6 +268,12 @@ HANDLE_TARGET_OPCODE(G_INTTOPTR)
 /// COPY is the relevant instruction.
 HANDLE_TARGET_OPCODE(G_BITCAST)
 
+/// INTRINSIC trunc intrinsic.
+HANDLE_TARGET_OPCODE(G_INTRINSIC_TRUNC)
+
+/// INTRINSIC round intrinsic.
+HANDLE_TARGET_OPCODE(G_INTRINSIC_ROUND)
+
 /// Generic load (including anyext load)
 HANDLE_TARGET_OPCODE(G_LOAD)
 

llvm/include/llvm/Target/GenericOpcodes.td

@@ -512,6 +512,21 @@ def G_FLOG2 : GenericInstruction {
   let hasSideEffects = 0;
 }
 
+//------------------------------------------------------------------------------
+// Opcodes for LLVM Intrinsics
+//------------------------------------------------------------------------------
+def G_INTRINSIC_TRUNC : GenericInstruction {
+  let OutOperandList = (outs type0:$dst);
+  let InOperandList = (ins type0:$src1);
+  let hasSideEffects = 0;
+}
+
+def G_INTRINSIC_ROUND : GenericInstruction {
+  let OutOperandList = (outs type0:$dst);
+  let InOperandList = (ins type0:$src1);
+  let hasSideEffects = 0;
+}
+
 //------------------------------------------------------------------------------
 // Memory ops
 //------------------------------------------------------------------------------

llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp

@@ -861,6 +861,16 @@ bool IRTranslator::translateKnownIntrinsic(const CallInst &CI, Intrinsic::ID ID,
         .addDef(getOrCreateVReg(CI))
         .addUse(getOrCreateVReg(*CI.getArgOperand(0)));
     return true;
+  case Intrinsic::trunc:
+    MIRBuilder.buildInstr(TargetOpcode::G_INTRINSIC_TRUNC)
+        .addDef(getOrCreateVReg(CI))
+        .addUse(getOrCreateVReg(*CI.getArgOperand(0)));
+    return true;
+  case Intrinsic::round:
+    MIRBuilder.buildInstr(TargetOpcode::G_INTRINSIC_ROUND)
+        .addDef(getOrCreateVReg(CI))
+        .addUse(getOrCreateVReg(*CI.getArgOperand(0)));
+    return true;
   case Intrinsic::fma:
     MIRBuilder.buildInstr(TargetOpcode::G_FMA)
         .addDef(getOrCreateVReg(CI))

llvm/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll

@@ -1408,6 +1408,26 @@ define float @test_fabs_intrin(float %a) {
   ret float %res
 }
 
+declare float @llvm.trunc.f32(float)
+define float @test_intrinsic_trunc(float %a) {
+; CHECK-LABEL: name: test_intrinsic_trunc
+; CHECK: [[A:%[0-9]+]]:_(s32) = COPY $s0
+; CHECK: [[RES:%[0-9]+]]:_(s32) = G_INTRINSIC_TRUNC [[A]]
+; CHECK: $s0 = COPY [[RES]]
+  %res = call float @llvm.trunc.f32(float %a)
+  ret float %res
+}
+
+declare float @llvm.round.f32(float)
+define float @test_intrinsic_round(float %a) {
+; CHECK-LABEL: name: test_intrinsic_round
+; CHECK: [[A:%[0-9]+]]:_(s32) = COPY $s0
+; CHECK: [[RES:%[0-9]+]]:_(s32) = G_INTRINSIC_ROUND [[A]]
+; CHECK: $s0 = COPY [[RES]]
+  %res = call float @llvm.round.f32(float %a)
+  ret float %res
+}
+
 declare i32 @llvm.ctlz.i32(i32, i1)
 define i32 @test_ctlz_intrinsic_zero_not_undef(i32 %a) {
 ; CHECK-LABEL: name: test_ctlz_intrinsic_zero_not_undef

llvm/test/CodeGen/AArch64/GlobalISel/legalizer-info-validation.mir

@@ -78,6 +78,12 @@
 # DEBUG-NEXT: G_BITCAST (opcode {{[0-9]+}}): 2 type indices
 # DEBUG:      .. the first uncovered type index: 2, OK
 #
+# DEBUG-NEXT: G_INTRINSIC_TRUNC (opcode {{[0-9]+}}): 1 type index
+# DEBUG:      .. type index coverage check SKIPPED: no rules defined
+#
+# DEBUG-NEXT: G_INTRINSIC_ROUND (opcode {{[0-9]+}}): 1 type index
+# DEBUG:      .. type index coverage check SKIPPED: no rules defined
+#
 # DEBUG-NEXT: G_LOAD (opcode {{[0-9]+}}): 2 type indices
 # DEBUG:      .. type index coverage check SKIPPED: user-defined predicate detected
 #