Revert "[X86][FastISel] Support medium code model in more places (llvm#75375)"

This reverts commit c64334f.

Author: Zentrik

llvm/lib/Target/X86/X86FastISel.cpp

@@ -711,8 +711,7 @@ bool X86FastISel::handleConstantAddresses(const Value *V, X86AddressMode &AM) {
   // Handle constant address.
   if (const GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
     // Can't handle alternate code models yet.
-    if (TM.getCodeModel() != CodeModel::Small &&
-        TM.getCodeModel() != CodeModel::Medium)
+    if (TM.getCodeModel() != CodeModel::Small)
       return false;
 
     // Can't handle TLS yet.
@@ -1045,8 +1044,7 @@ bool X86FastISel::X86SelectCallAddress(const Value *V, X86AddressMode &AM) {
   // Handle constant address.
   if (const GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
     // Can't handle alternate code models yet.
-    if (TM.getCodeModel() != CodeModel::Small &&
-        TM.getCodeModel() != CodeModel::Medium)
+    if (TM.getCodeModel() != CodeModel::Small)
       return false;
 
     // RIP-relative addresses can't have additional register operands.
@@ -3771,8 +3769,7 @@ unsigned X86FastISel::X86MaterializeFP(const ConstantFP *CFP, MVT VT) {
 
   // Can't handle alternate code models yet.
   CodeModel::Model CM = TM.getCodeModel();
-  if (CM != CodeModel::Small && CM != CodeModel::Medium &&
-      CM != CodeModel::Large)
+  if (CM != CodeModel::Small && CM != CodeModel::Large)
     return 0;
 
   // Get opcode and regclass of the output for the given load instruction.
@@ -3810,7 +3807,7 @@ unsigned X86FastISel::X86MaterializeFP(const ConstantFP *CFP, MVT VT) {
     PICBase = getInstrInfo()->getGlobalBaseReg(FuncInfo.MF);
   else if (OpFlag == X86II::MO_GOTOFF)
     PICBase = getInstrInfo()->getGlobalBaseReg(FuncInfo.MF);
-  else if (Subtarget->is64Bit() && TM.getCodeModel() != CodeModel::Large)
+  else if (Subtarget->is64Bit() && TM.getCodeModel() == CodeModel::Small)
     PICBase = X86::RIP;
 
   // Create the load from the constant pool.
@@ -3840,11 +3837,8 @@ unsigned X86FastISel::X86MaterializeFP(const ConstantFP *CFP, MVT VT) {
 }
 
 unsigned X86FastISel::X86MaterializeGV(const GlobalValue *GV, MVT VT) {
-  // Can't handle large GlobalValues yet.
-  if (TM.getCodeModel() != CodeModel::Small &&
-      TM.getCodeModel() != CodeModel::Medium)
-    return 0;
-  if (!isa<GlobalObject>(GV) || TM.isLargeGlobalObject(cast<GlobalObject>(GV)))
+  // Can't handle alternate code models yet.
+  if (TM.getCodeModel() != CodeModel::Small)
     return 0;
 
   // Materialize addresses with LEA/MOV instructions.

llvm/test/CodeGen/X86/fast-isel-constpool.ll

@@ -1,6 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; RUN: llc -mtriple=x86_64-apple-darwin -fast-isel -code-model=small < %s | FileCheck %s
-; RUN: llc -mtriple=x86_64-apple-darwin -fast-isel -code-model=medium < %s | FileCheck %s
 ; RUN: llc -mtriple=x86_64-apple-darwin -fast-isel -code-model=large < %s | FileCheck %s --check-prefix=LARGE
 ; RUN: llc -mtriple=x86_64 -fast-isel -code-model=large -relocation-model=pic < %s | FileCheck %s --check-prefix=LARGE_PIC
 ; RUN: llc -mtriple=x86_64-apple-darwin -fast-isel -code-model=small -mattr=avx < %s | FileCheck %s --check-prefix=AVX