[GISel]: Add Opcodes for a few LLVM Intrinsics

https://reviews.llvm.org/D50401

Add opcodes for llvm.intrinsic.trunc, round, and update the IRTranslator
for the same.

Reviewed by: dsanders.

llvm-svn: 339977

diff --git a/llvm/include/llvm/Support/TargetOpcodes.def b/llvm/include/llvm/Support/TargetOpcodes.def
index 9143e5b..dfd15ac 100644 (file)
--- a/llvm/include/llvm/Support/TargetOpcodes.def
+++ b/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)
 

diff --git a/llvm/include/llvm/Target/GenericOpcodes.td b/llvm/include/llvm/Target/GenericOpcodes.td
index 90c121d..2a2bef2 100644 (file)
--- a/llvm/include/llvm/Target/GenericOpcodes.td
+++ b/llvm/include/llvm/Target/GenericOpcodes.td
@@ -513,6 +513,21 @@ def G_FLOG2 : GenericInstruction {
 }
 
 //------------------------------------------------------------------------------
+// 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
 //------------------------------------------------------------------------------
 

diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
index 74f51cc..3fda5cb 100644 (file)
--- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -850,6 +850,16 @@ 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))

diff --git a/llvm/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll b/llvm/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
index 75615e9..cf30558 100644 (file)
--- a/llvm/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
+++ b/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