Add hook to insert late LLVM=>LLVM passes just before isel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100640 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/llvm/Target/TargetMachine.h b/include/llvm/Target/TargetMachine.h
index d1d665f..2f29de5 100644
--- a/include/llvm/Target/TargetMachine.h
+++ b/include/llvm/Target/TargetMachine.h
@@ -264,10 +264,15 @@
bool DisableVerify = true);
/// Target-Independent Code Generator Pass Configuration Options.
-
- /// addInstSelector - This method should add any "last minute" LLVM->LLVM
- /// passes, then install an instruction selector pass, which converts from
- /// LLVM code to machine instructions.
+
+ /// addPreISelPasses - This method should add any "last minute" LLVM->LLVM
+ /// passes (which are run just before instruction selector).
+ virtual bool addPreISel(PassManagerBase &, CodeGenOpt::Level) {
+ return true;
+ }
+
+ /// addInstSelector - This method should install an instruction selector pass,
+ /// which converts from LLVM code to machine instructions.
virtual bool addInstSelector(PassManagerBase &, CodeGenOpt::Level) {
return true;
}
diff --git a/lib/CodeGen/LLVMTargetMachine.cpp b/lib/CodeGen/LLVMTargetMachine.cpp
index ced6664..714ad73 100644
--- a/lib/CodeGen/LLVMTargetMachine.cpp
+++ b/lib/CodeGen/LLVMTargetMachine.cpp
@@ -268,6 +268,8 @@
PM.add(createStackProtectorPass(getTargetLowering()));
+ addPreISel(PM, OptLevel);
+
if (PrintISelInput)
PM.add(createPrintFunctionPass("\n\n"
"*** Final LLVM Code input to ISel ***\n",