[GlobalISel][AArch64] Add legalization for G_FLOG

This adds support for legalizing G_FLOG into a RTLib call.

It adds a legalizer test, and updates the existing floating point tests.

https://reviews.llvm.org/D57347

llvm-svn: 352429

1 files changed, 7 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index 4c686a5138d..fef1605fecf 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -134,6 +134,10 @@ static RTLIB::Libcall getRTLibDesc(unsigned Opcode, unsigned Size) {
     assert((Size == 32 || Size == 64 || Size == 128) && "Unsupported size");
     return Size == 128 ? RTLIB::LOG10_F128
                        : Size == 64 ? RTLIB::LOG10_F64 : RTLIB::LOG10_F32;
+  case TargetOpcode::G_FLOG:
+    assert((Size == 32 || Size == 64 || Size == 128) && "Unsupported size");
+    return Size == 128 ? RTLIB::LOG_F128
+                       : Size == 64 ? RTLIB::LOG_F64 : RTLIB::LOG_F32;
   }
   llvm_unreachable("Unknown libcall function");
 }
@@ -228,7 +232,8 @@ LegalizerHelper::libcall(MachineInstr &MI) {
   case TargetOpcode::G_FREM:
   case TargetOpcode::G_FCOS:
   case TargetOpcode::G_FSIN:
-  case TargetOpcode::G_FLOG10: {
+  case TargetOpcode::G_FLOG10:
+  case TargetOpcode::G_FLOG: {
     if (Size > 64) {
       LLVM_DEBUG(dbgs() << "Size " << Size << " too large to legalize.\n");
       return UnableToLegalize;
@@ -1090,6 +1095,7 @@ LegalizerHelper::widenScalar(MachineInstr &MI, unsigned TypeIdx, LLT WideTy) {
   case TargetOpcode::G_FCOS:
   case TargetOpcode::G_FSIN:
   case TargetOpcode::G_FLOG10:
+  case TargetOpcode::G_FLOG:
     assert(TypeIdx == 0);
     Observer.changingInstr(MI);