Reapply "Finish deleting the le32/le64 targets" (#99079) (#101983)

This reverts commit d3f8105.

Halide no longer relies on this target:
#98497 (comment)

Author: AaronBallman

clang/docs/ReleaseNotes.rst

@@ -37,6 +37,8 @@ These changes are ones which we think may surprise users when upgrading to
 Clang |release| because of the opportunity they pose for disruption to existing
 code bases.
 
+- The ``le32`` and ``le64`` targets have been removed.
+
 C/C++ Language Potentially Breaking Changes
 -------------------------------------------
 

clang/docs/tools/clang-formatted-files.txt

@@ -362,7 +362,6 @@ clang/lib/Basic/Targets/BPF.cpp
 clang/lib/Basic/Targets/BPF.h
 clang/lib/Basic/Targets/Hexagon.h
 clang/lib/Basic/Targets/Lanai.h
-clang/lib/Basic/Targets/Le64.h
 clang/lib/Basic/Targets/M68k.h
 clang/lib/Basic/Targets/MSP430.h
 clang/lib/Basic/Targets/NVPTX.cpp

clang/lib/Basic/CMakeLists.txt

@@ -102,7 +102,6 @@ add_clang_library(clangBasic
   Targets/DirectX.cpp
   Targets/Hexagon.cpp
   Targets/Lanai.cpp
-  Targets/Le64.cpp
   Targets/LoongArch.cpp
   Targets/M68k.cpp
   Targets/MSP430.cpp

clang/lib/Basic/Targets.cpp

@@ -23,7 +23,6 @@
 #include "Targets/DirectX.h"
 #include "Targets/Hexagon.h"
 #include "Targets/Lanai.h"
-#include "Targets/Le64.h"
 #include "Targets/LoongArch.h"
 #include "Targets/M68k.h"
 #include "Targets/MSP430.h"
@@ -344,17 +343,6 @@ std::unique_ptr<TargetInfo> AllocateTarget(const llvm::Triple &Triple,
       return std::make_unique<M68kTargetInfo>(Triple, Opts);
     }
 
-  case llvm::Triple::le32:
-    switch (os) {
-    case llvm::Triple::NaCl:
-      return std::make_unique<NaClTargetInfo<PNaClTargetInfo>>(Triple, Opts);
-    default:
-      return nullptr;
-    }
-
-  case llvm::Triple::le64:
-    return std::make_unique<Le64TargetInfo>(Triple, Opts);
-
   case llvm::Triple::ppc:
     switch (os) {
     case llvm::Triple::Linux:

clang/lib/Basic/Targets/Le64.cpp

@@ -841,9 +841,6 @@ class LLVM_LIBRARY_VISIBILITY NaClTargetInfo : public OSTargetInfo<Target> {
                             "i64:64-i128:128-n8:16:32:64-S128");
     } else if (Triple.getArch() == llvm::Triple::mipsel) {
       // Handled on mips' setDataLayout.
-    } else {
-      assert(Triple.getArch() == llvm::Triple::le32);
-      this->resetDataLayout("e-p:32:32-i64:64");
     }
   }
 };

clang/lib/Basic/Targets/Le64.h

@@ -116,8 +116,6 @@ createTargetCodeGenInfo(CodeGenModule &CGM) {
   default:
     return createDefaultTargetCodeGenInfo(CGM);
 
-  case llvm::Triple::le32:
-    return createPNaClTargetCodeGenInfo(CGM);
   case llvm::Triple::m68k:
     return createM68kTargetCodeGenInfo(CGM);
   case llvm::Triple::mips:

clang/lib/Basic/Targets/OSTargets.h

@@ -582,13 +582,6 @@ CodeGen::CGCXXABI *CodeGen::CreateItaniumCXXABI(CodeGenModule &CGM) {
     return new XLCXXABI(CGM);
 
   case TargetCXXABI::GenericItanium:
-    if (CGM.getContext().getTargetInfo().getTriple().getArch()
-        == llvm::Triple::le32) {
-      // For PNaCl, use ARM-style method pointers so that PNaCl code
-      // does not assume anything about the alignment of function
-      // pointers.
-      return new ItaniumCXXABI(CGM, /*UseARMMethodPtrABI=*/true);
-    }
     return new ItaniumCXXABI(CGM);
 
   case TargetCXXABI::Microsoft:

clang/lib/CodeGen/CodeGenModule.cpp

@@ -3928,12 +3928,6 @@ static void RenderBuiltinOptions(const ToolChain &TC, const llvm::Triple &T,
     if (UseBuiltins)
       A->render(Args, CmdArgs);
   }
-
-  // le32-specific flags:
-  //  -fno-math-builtin: clang should not convert math builtins to intrinsics
-  //                     by default.
-  if (TC.getArch() == llvm::Triple::le32)
-    CmdArgs.push_back("-fno-math-builtin");
 }
 
 bool Driver::getDefaultModuleCachePath(SmallVectorImpl<char> &Result) {