fixup! fix test and change threshold

Author: michaelmaitland

llvm/lib/Target/RISCV/RISCVRegisterInfo.h

@@ -63,9 +63,9 @@ struct RISCVRegisterInfo : public RISCVGenRegisterInfo {
 
   unsigned getCSRFirstUseCost() const override {
     // The cost will be compared against BlockFrequency where entry has the
-    // value of 1 << 14. A value of 64 will choose to spill or split cold
+    // value of 1 << 14. A value of 5 will choose to spill or split cold
     // path instead of using a callee-saved register.
-    return 64;
+    return 5;
   }
 
   const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF) const override;

llvm/test/CodeGen/RISCV/csr-first-use-cost.ll

@@ -1,6 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
-; RUN: llc %s -mtriple=riscv64 -regalloc-csr-first-time-cost=0 | FileCheck %s -check-prefix=ZERO-COST
-; RUN: llc %s -mtriple=riscv64 | FileCheck %s -check-prefix=DEFAULT-COST
+; RUN: llc -mtriple=riscv64 -regalloc-csr-first-time-cost=0 < %s | FileCheck %s -check-prefix=ZERO-COST
+; RUN: llc -mtriple=riscv64 < %s | FileCheck %s -check-prefix=DEFAULT-COST
 
 define fastcc void @Perl_sv_setnv(i8 %c, ptr %.str.54.3682) nounwind {
 ; ZERO-COST-LABEL: Perl_sv_setnv: