[llvm-exegesis] Generate snippet setup code.
Summary:
This ensures that the snippet always sees the same values for registers,
making measurements reproducible.
This will also allow exploring different values.
Reviewers: gchatelet
Subscribers: tschuett, llvm-commits
Differential Revision: https://reviews.llvm.org/D48542
llvm-svn: 335465
diff --git a/llvm/tools/llvm-exegesis/lib/Assembler.h b/llvm/tools/llvm-exegesis/lib/Assembler.h
index 932542c..fb39053 100644
--- a/llvm/tools/llvm-exegesis/lib/Assembler.h
+++ b/llvm/tools/llvm-exegesis/lib/Assembler.h
@@ -33,6 +33,8 @@
namespace exegesis {
+class ExegesisTarget;
+
// Gather the set of reserved registers (depends on function's calling
// convention and target machine).
llvm::BitVector getFunctionReservedRegs(const llvm::TargetMachine &TM);
@@ -41,7 +43,9 @@
// Instructions. Runs a set of llvm Passes to provide correct prologue and
// epilogue. Once the MachineFunction is ready, it is assembled for TM to
// AsmStream, the temporary function is eventually discarded.
-void assembleToStream(std::unique_ptr<llvm::LLVMTargetMachine> TM,
+void assembleToStream(const ExegesisTarget *ET,
+ std::unique_ptr<llvm::LLVMTargetMachine> TM,
+ llvm::ArrayRef<unsigned> RegsToDef,
llvm::ArrayRef<llvm::MCInst> Instructions,
llvm::raw_pwrite_stream &AsmStream);