CodeGen: Fix libcall names for exp10 on the various darwins

It's really great that we have the same information duplicated in
TargetLibraryInfo and RuntimeLibcalls which both assume everything
by default.

Should fix issue reported after #92287

llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp

@@ -2050,8 +2050,15 @@ SDValue SelectionDAGLegalize::ExpandSPLAT_VECTOR(SDNode *Node) {
 std::pair<SDValue, SDValue> SelectionDAGLegalize::ExpandLibCall(RTLIB::Libcall LC, SDNode *Node,
                                             TargetLowering::ArgListTy &&Args,
                                             bool isSigned) {
-  SDValue Callee = DAG.getExternalSymbol(TLI.getLibcallName(LC),
-                                         TLI.getPointerTy(DAG.getDataLayout()));
+  EVT CodePtrTy = TLI.getPointerTy(DAG.getDataLayout());
+  SDValue Callee;
+  if (const char *LibcallName = TLI.getLibcallName(LC))
+    Callee = DAG.getExternalSymbol(LibcallName, CodePtrTy);
+  else {
+    Callee = DAG.getUNDEF(CodePtrTy);
+    DAG.getContext()->emitError(Twine("no libcall available for ") +
+                                Node->getOperationName(&DAG));
+  }
 
   EVT RetVT = Node->getValueType(0);
   Type *RetTy = RetVT.getTypeForEVT(*DAG.getContext());

llvm/lib/CodeGen/TargetLoweringBase.cpp

@@ -227,6 +227,34 @@ void TargetLoweringBase::InitLibcalls(const Triple &TT) {
                               CallingConv::ARM_AAPCS_VFP);
       }
     }
+
+    switch (TT.getOS()) {
+    case Triple::MacOSX:
+      if (TT.isMacOSXVersionLT(10, 9)) {
+        setLibcallName(RTLIB::EXP10_F32, nullptr);
+        setLibcallName(RTLIB::EXP10_F64, nullptr);
+      } else {
+        setLibcallName(RTLIB::EXP10_F32, "__exp10f");
+        setLibcallName(RTLIB::EXP10_F64, "__exp10");
+      }
+      break;
+    case Triple::IOS:
+    case Triple::TvOS:
+    case Triple::WatchOS:
+    case Triple::XROS:
+      if (!TT.isWatchOS() &&
+          (TT.isOSVersionLT(7, 0) || (TT.isOSVersionLT(9, 0) && TT.isX86()))) {
+        setLibcallName(RTLIB::EXP10_F32, nullptr);
+        setLibcallName(RTLIB::EXP10_F64, nullptr);
+      } else {
+        setLibcallName(RTLIB::EXP10_F32, "__exp10f");
+        setLibcallName(RTLIB::EXP10_F64, "__exp10");
+      }
+
+      break;
+    default:
+      break;
+    }
   } else {
     setLibcallName(RTLIB::FPEXT_F16_F32, "__gnu_h2f_ieee");
     setLibcallName(RTLIB::FPROUND_F32_F16, "__gnu_f2h_ieee");

llvm/test/CodeGen/AArch64/exp10-libcall-names.ll

@@ -0,0 +1,39 @@
+; RUN: llc -mtriple=aarch64-linux-gnu < %s | FileCheck -check-prefix=LINUX %s
+; RUN: llc -mtriple=aarch64-apple-macos10.9 < %s | FileCheck -check-prefix=APPLE %s
+; RUN: llc -mtriple=aarch64-apple-ios7.0 < %s | FileCheck -check-prefix=APPLE %s
+; RUN: llc -mtriple=aarch64-apple-tvos7.0 < %s | FileCheck -check-prefix=APPLE %s
+; RUN: llc -mtriple=aarch64-apple-watchos7.0 < %s | FileCheck -check-prefix=APPLE %s
+; RUN: llc -mtriple=aarch64-apple-xros7.0 < %s | FileCheck -check-prefix=APPLE %s
+
+; RUN: not llc -mtriple=aarch64-apple-macos10.8 -filetype=null %s 2>&1 | FileCheck -check-prefix=ERR %s
+; RUN: not llc -mtriple=aarch64-apple-ios6.0 -filetype=null %s 2>&1 | FileCheck -check-prefix=ERR %s
+; RUN: not llc -mtriple=aarch64-apple-tvos6.0 -filetype=null %s 2>&1 | FileCheck -check-prefix=ERR %s
+; RUN: not llc -mtriple=aarch64-apple-xros6.0 -filetype=null %s 2>&1 | FileCheck -check-prefix=ERR %s
+
+; Check exp10/exp10f is emitted as __exp10/__exp10f on assorted systems.
+
+; ERR: no libcall available for fexp10
+
+define float @test_exp10_f32(float %x) {
+; LINUX-LABEL: test_exp10_f32:
+; LINUX:       // %bb.0:
+; LINUX-NEXT:    b exp10f
+;
+; APPLE-LABEL: test_exp10_f32:
+; APPLE:       ; %bb.0:
+; APPLE-NEXT:    b ___exp10f
+  %ret = call float @llvm.exp10.f32(float %x)
+  ret float %ret
+}
+
+define double @test_exp10_f64(double %x) {
+; LINUX-LABEL: test_exp10_f64:
+; LINUX:       // %bb.0:
+; LINUX-NEXT:    b exp10
+;
+; APPLE-LABEL: test_exp10_f64:
+; APPLE:       ; %bb.0:
+; APPLE-NEXT:    b ___exp10
+  %ret = call double @llvm.exp10.f64(double %x)
+  ret double %ret
+}

llvm/test/CodeGen/ARM/exp10-libcall-names.ll

@@ -0,0 +1,39 @@
+; RUN: llc -mtriple=armv7-linux-gnu < %s | FileCheck -check-prefix=LINUX %s
+; RUN: llc -mtriple=armv7-apple-macos10.9 < %s | FileCheck -check-prefix=APPLE %s
+; RUN: llc -mtriple=armv7-apple-ios7.0 < %s | FileCheck -check-prefix=APPLE %s
+; RUN: llc -mtriple=armv7-apple-tvos7.0 < %s | FileCheck -check-prefix=APPLE %s
+; RUN: llc -mtriple=armv7-apple-watchos7.0 < %s | FileCheck -check-prefix=APPLE %s
+; RUN: llc -mtriple=armv7-apple-xros7.0 < %s | FileCheck -check-prefix=APPLE %s
+
+; RUN: not llc -mtriple=armv7-apple-macos10.8 -filetype=null %s 2>&1 | FileCheck -check-prefix=ERR %s
+; RUN: not llc -mtriple=armv7-apple-ios6.0 -filetype=null %s 2>&1 | FileCheck -check-prefix=ERR %s
+; RUN: not llc -mtriple=armv7-apple-tvos6.0 -filetype=null %s 2>&1 | FileCheck -check-prefix=ERR %s
+; RUN: not llc -mtriple=armv7-apple-xros6.0 -filetype=null %s 2>&1 | FileCheck -check-prefix=ERR %s
+
+; Check exp10/exp10f is emitted as __exp10/__exp10f on assorted systems.
+
+; ERR: no libcall available for fexp10
+
+define float @test_exp10_f32(float %x) {
+; LINUX-LABEL: test_exp10_f32:
+; LINUX:       @ %bb.0:
+; LINUX-NEXT:    b exp10f
+;
+; APPLE-LABEL: test_exp10_f32:
+; APPLE:       @ %bb.0:
+; APPLE-NEXT:    b ___exp10f
+  %ret = call float @llvm.exp10.f32(float %x)
+  ret float %ret
+}
+
+define double @test_exp10_f64(double %x) {
+; LINUX-LABEL: test_exp10_f64:
+; LINUX:       @ %bb.0:
+; LINUX-NEXT:    b exp10
+;
+; APPLE-LABEL: test_exp10_f64:
+; APPLE:       @ %bb.0:
+; APPLE-NEXT:    b ___exp10
+  %ret = call double @llvm.exp10.f64(double %x)
+  ret double %ret
+}

llvm/test/CodeGen/X86/exp10-libcall-names.ll

@@ -0,0 +1,40 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
+; RUN: llc -mtriple=x86_64-linux-gnu < %s | FileCheck -check-prefix=LINUX %s
+; RUN: llc -mtriple=x86_64-apple-macos10.9 < %s | FileCheck -check-prefix=APPLE %s
+; RUN: llc -mtriple=x86_64-apple-ios9.0 < %s | FileCheck -check-prefix=APPLE %s
+; RUN: llc -mtriple=x86_64-apple-tvos9.0 < %s | FileCheck -check-prefix=APPLE %s
+; RUN: llc -mtriple=x86_64-apple-watchos9.0 < %s | FileCheck -check-prefix=APPLE %s
+; RUN: llc -mtriple=x86_64-apple-xros9.0 < %s | FileCheck -check-prefix=APPLE %s
+
+; RUN: not llc -mtriple=x86_64-apple-macos10.8 -filetype=null %s 2>&1 | FileCheck -check-prefix=ERR %s
+; RUN: not llc -mtriple=x86_64-apple-ios8.0 -filetype=null %s 2>&1 | FileCheck -check-prefix=ERR %s
+; RUN: not llc -mtriple=x86_64-apple-tvos8.0 -filetype=null %s 2>&1 | FileCheck -check-prefix=ERR %s
+; RUN: not llc -mtriple=x86_64-apple-xros8.0 -filetype=null %s 2>&1 | FileCheck -check-prefix=ERR %s
+
+; Check exp10/exp10f is emitted as __exp10/__exp10f on assorted systems.
+
+; ERR: no libcall available for fexp10
+
+define float @test_exp10_f32(float %x) {
+; LINUX-LABEL: test_exp10_f32:
+; LINUX:       # %bb.0:
+; LINUX-NEXT:    jmp exp10f@PLT # TAILCALL
+;
+; APPLE-LABEL: test_exp10_f32:
+; APPLE:       ## %bb.0:
+; APPLE-NEXT:    jmp ___exp10f ## TAILCALL
+  %ret = call float @llvm.exp10.f32(float %x)
+  ret float %ret
+}
+
+define double @test_exp10_f64(double %x) {
+; LINUX-LABEL: test_exp10_f64:
+; LINUX:       # %bb.0:
+; LINUX-NEXT:    jmp exp10@PLT # TAILCALL
+;
+; APPLE-LABEL: test_exp10_f64:
+; APPLE:       ## %bb.0:
+; APPLE-NEXT:    jmp ___exp10 ## TAILCALL
+  %ret = call double @llvm.exp10.f64(double %x)
+  ret double %ret
+}