Large spills fix

Author: lenary

llvm/lib/Target/RISCV/RISCVRegisterInfo.cpp

@@ -547,7 +547,9 @@ bool RISCVRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
       // MIPS Prefetch instructions require the offset to be 9 bits encoded.
       MI.getOperand(FIOperandNum + 1).ChangeToImmediate(0);
     } else if ((Opc == RISCV::PseudoRV32ZdinxLD ||
-                Opc == RISCV::PseudoRV32ZdinxSD) &&
+                Opc == RISCV::PseudoRV32ZdinxSD ||
+                Opc == RISCV::PseudoLD_RV32_OPT ||
+                Opc == RISCV::PseudoSD_RV32_OPT) &&
                Lo12 >= 2044) {
       // This instruction will be split into 2 instructions. The second
       // instruction will add 4 to the immediate. If that would overflow 12

llvm/test/CodeGen/RISCV/zilsd-large-spill.mir

@@ -21,7 +21,8 @@
   ; CHECK-NEXT:    lui a0, 1
   ; CHECK-NEXT:    add a0, sp, a0
   ; CHECK-NEXT:    sd a4, -2040(a0) # 8-byte Folded Spill
-  ; CHECK-NEXT:    sd a6, 2044(sp) # 8-byte Folded Spill
+  ; CHECK-NEXT:    addi a0, sp, 2044
+  ; CHECK-NEXT:    sd a6, 0(a0) # 8-byte Folded Spill
   ; CHECK-NEXT:    lui a0, 1
   ; CHECK-NEXT:    add a0, sp, a0
   ; CHECK-NEXT:    ld a0, -2024(a0) # 8-byte Folded Reload
@@ -31,7 +32,8 @@
   ; CHECK-NEXT:    lui a0, 1
   ; CHECK-NEXT:    add a0, sp, a0
   ; CHECK-NEXT:    ld a4, -2040(a0) # 8-byte Folded Reload
-  ; CHECK-NEXT:    ld a6, 2044(sp) # 8-byte Folded Reload
+  ; CHECK-NEXT:    addi a0, sp, 2044
+  ; CHECK-NEXT:    ld a6, 0(a0) # 8-byte Folded Reload
   ; CHECK-NEXT:    addi sp, sp, 2032
   ; CHECK-NEXT:    addi sp, sp, 48
   ; CHECK-NEXT:    .cfi_def_cfa_offset 0