[X86] Move getting module flag into `runOnMachineFunction` to reduce compile-time. NFCIlinaro-local/ci/tcwg_bmk_llvm_fx/llvm-master-aarch64-spec2k6-O2

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D131245

3 files changed, 8 insertions, 5 deletions

diff --git a/llvm/lib/Target/X86/X86AsmPrinter.cpp b/llvm/lib/Target/X86/X86AsmPrinter.cpp
index c205395aa084..3fc0eec8d1ed 100644
--- a/llvm/lib/Target/X86/X86AsmPrinter.cpp
+++ b/llvm/lib/Target/X86/X86AsmPrinter.cpp
@@ -66,6 +66,9 @@ bool X86AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
   EmitFPOData =
       Subtarget->isTargetWin32() && MF.getMMI().getModule()->getCodeViewFlag();
 
+  IndCSPrefix =
+      MF.getMMI().getModule()->getModuleFlag("indirect_branch_cs_prefix");
+
   SetupMachineFunction(MF);
 
   if (Subtarget->isTargetCOFF()) {
@@ -86,6 +89,8 @@ bool X86AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
 
   EmitFPOData = false;
 
+  IndCSPrefix = false;
+
   // We didn't modify anything.
   return false;
 }
diff --git a/llvm/lib/Target/X86/X86AsmPrinter.h b/llvm/lib/Target/X86/X86AsmPrinter.h
index d53c26b729ef..043c4b855475 100644
--- a/llvm/lib/Target/X86/X86AsmPrinter.h
+++ b/llvm/lib/Target/X86/X86AsmPrinter.h
@@ -31,6 +31,7 @@ class LLVM_LIBRARY_VISIBILITY X86AsmPrinter : public AsmPrinter {
   std::unique_ptr<MCCodeEmitter> CodeEmitter;
   bool EmitFPOData = false;
   bool ShouldEmitWeakSwiftAsyncExtendedFramePointerFlags = false;
+  bool IndCSPrefix = false;
 
   // This utility class tracks the length of a stackmap instruction's 'shadow'.
   // It is used by the X86AsmPrinter to ensure that the stackmap shadow
diff --git a/llvm/lib/Target/X86/X86MCInstLower.cpp b/llvm/lib/Target/X86/X86MCInstLower.cpp
index bfbded8c5d64..e6116642aaa4 100644
--- a/llvm/lib/Target/X86/X86MCInstLower.cpp
+++ b/llvm/lib/Target/X86/X86MCInstLower.cpp
@@ -2449,9 +2449,6 @@ void X86AsmPrinter::emitInstruction(const MachineInstr *MI) {
   if (OutStreamer->isVerboseAsm())
     addConstantComments(MI, *OutStreamer);
 
-  bool IndCS =
-      MF->getMMI().getModule()->getModuleFlag("indirect_branch_cs_prefix");
-
   switch (MI->getOpcode()) {
   case TargetOpcode::DBG_VALUE:
     llvm_unreachable("Should be handled target independently");
@@ -2501,7 +2498,7 @@ void X86AsmPrinter::emitInstruction(const MachineInstr *MI) {
   }
 
   case X86::TAILJMPd64:
-    if (IndCS && MI->hasRegisterImplicitUseOperand(X86::R11))
+    if (IndCSPrefix && MI->hasRegisterImplicitUseOperand(X86::R11))
       EmitAndCountInstruction(MCInstBuilder(X86::CS_PREFIX));
     LLVM_FALLTHROUGH;
   case X86::TAILJMPr:
@@ -2684,7 +2681,7 @@ void X86AsmPrinter::emitInstruction(const MachineInstr *MI) {
                                 .addReg(X86::NoRegister));
     return;
   case X86::CALL64pcrel32:
-    if (IndCS && MI->hasRegisterImplicitUseOperand(X86::R11))
+    if (IndCSPrefix && MI->hasRegisterImplicitUseOperand(X86::R11))
       EmitAndCountInstruction(MCInstBuilder(X86::CS_PREFIX));
     break;
   }