test/CodeGen/RISCV/fold-addi-loadstore.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s \
; RUN:   | FileCheck -check-prefix=RV32I %s
; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s \
; RUN:   | FileCheck -check-prefix=RV64I %s

; We can often fold an ADDI into the offset of load/store instructions:
;   (load (addi base, off1), off2) -> (load base, off1+off2)
;   (store val, (addi base, off1), off2) -> (store val, base, off1+off2)
; This is possible when the off1+off2 continues to fit the 12-bit immediate.
; Check if we do the fold under various conditions. If off1 is (the low part of)
; an address the fold's safety depends on the variable's alignment.

@g_0 = dso_local global i64 0
@g_1 = dso_local global i64 0, align 1
@g_2 = dso_local global i64 0, align 2
@g_4 = dso_local global i64 0, align 4
@g_8 = dso_local global i64 0, align 8
@g_16 = dso_local global i64 0, align 16

define dso_local i64 @load_g_0() nounwind {
; RV32I-LABEL: load_g_0:
; RV32I:       # %bb.0: # %entry
; RV32I-NEXT:    lui a1, %hi(g_0)
; RV32I-NEXT:    lw a0, %lo(g_0)(a1)
; RV32I-NEXT:    lw a1, %lo(g_0+4)(a1)
; RV32I-NEXT:    ret
;
; RV64I-LABEL: load_g_0:
; RV64I:       # %bb.0: # %entry
; RV64I-NEXT:    lui a0, %hi(g_0)
; RV64I-NEXT:    ld a0, %lo(g_0)(a0)
; RV64I-NEXT:    ret
entry:
  %0 = load i64, i64* @g_0
  ret i64 %0
}

define dso_local i64 @load_g_1() nounwind {
; RV32I-LABEL: load_g_1:
; RV32I:       # %bb.0: # %entry
; RV32I-NEXT:    lui a1, %hi(g_1)
; RV32I-NEXT:    lw a0, %lo(g_1)(a1)
; RV32I-NEXT:    addi a1, a1, %lo(g_1)
; RV32I-NEXT:    lw a1, 4(a1)
; RV32I-NEXT:    ret
;
; RV64I-LABEL: load_g_1:
; RV64I:       # %bb.0: # %entry
; RV64I-NEXT:    lui a0, %hi(g_1)
; RV64I-NEXT:    ld a0, %lo(g_1)(a0)
; RV64I-NEXT:    ret
entry:
  %0 = load i64, i64* @g_1
  ret i64 %0
}

define dso_local i64 @load_g_2() nounwind {
; RV32I-LABEL: load_g_2:
; RV32I:       # %bb.0: # %entry
; RV32I-NEXT:    lui a1, %hi(g_2)
; RV32I-NEXT:    lw a0, %lo(g_2)(a1)
; RV32I-NEXT:    addi a1, a1, %lo(g_2)
; RV32I-NEXT:    lw a1, 4(a1)
; RV32I-NEXT:    ret
;
; RV64I-LABEL: load_g_2:
; RV64I:       # %bb.0: # %entry
; RV64I-NEXT:    lui a0, %hi(g_2)
; RV64I-NEXT:    ld a0, %lo(g_2)(a0)
; RV64I-NEXT:    ret
entry:
  %0 = load i64, i64* @g_2
  ret i64 %0
}

define dso_local i64 @load_g_4() nounwind {
; RV32I-LABEL: load_g_4:
; RV32I:       # %bb.0: # %entry
; RV32I-NEXT:    lui a1, %hi(g_4)
; RV32I-NEXT:    lw a0, %lo(g_4)(a1)
; RV32I-NEXT:    addi a1, a1, %lo(g_4)
; RV32I-NEXT:    lw a1, 4(a1)
; RV32I-NEXT:    ret
;
; RV64I-LABEL: load_g_4:
; RV64I:       # %bb.0: # %entry
; RV64I-NEXT:    lui a0, %hi(g_4)
; RV64I-NEXT:    ld a0, %lo(g_4)(a0)
; RV64I-NEXT:    ret
entry:
  %0 = load i64, i64* @g_4
  ret i64 %0
}

define dso_local i64 @load_g_8() nounwind {
; RV32I-LABEL: load_g_8:
; RV32I:       # %bb.0: # %entry
; RV32I-NEXT:    lui a1, %hi(g_8)
; RV32I-NEXT:    lw a0, %lo(g_8)(a1)
; RV32I-NEXT:    lw a1, %lo(g_8+4)(a1)
; RV32I-NEXT:    ret
;
; RV64I-LABEL: load_g_8:
; RV64I:       # %bb.0: # %entry
; RV64I-NEXT:    lui a0, %hi(g_8)
; RV64I-NEXT:    ld a0, %lo(g_8)(a0)
; RV64I-NEXT:    ret
entry:
  %0 = load i64, i64* @g_8
  ret i64 %0
}

define dso_local i64 @load_g_16() nounwind {
; RV32I-LABEL: load_g_16:
; RV32I:       # %bb.0: # %entry
; RV32I-NEXT:    lui a1, %hi(g_16)
; RV32I-NEXT:    lw a0, %lo(g_16)(a1)
; RV32I-NEXT:    lw a1, %lo(g_16+4)(a1)
; RV32I-NEXT:    ret
;
; RV64I-LABEL: load_g_16:
; RV64I:       # %bb.0: # %entry
; RV64I-NEXT:    lui a0, %hi(g_16)
; RV64I-NEXT:    ld a0, %lo(g_16)(a0)
; RV64I-NEXT:    ret
entry:
  %0 = load i64, i64* @g_16
  ret i64 %0
}

define dso_local void @store_g_4() nounwind {
; RV32I-LABEL: store_g_4:
; RV32I:       # %bb.0: # %entry
; RV32I-NEXT:    lui a0, %hi(g_4)
; RV32I-NEXT:    sw zero, %lo(g_4)(a0)
; RV32I-NEXT:    addi a0, a0, %lo(g_4)
; RV32I-NEXT:    sw zero, 4(a0)
; RV32I-NEXT:    ret
;
; RV64I-LABEL: store_g_4:
; RV64I:       # %bb.0: # %entry
; RV64I-NEXT:    lui a0, %hi(g_4)
; RV64I-NEXT:    sd zero, %lo(g_4)(a0)
; RV64I-NEXT:    ret
entry:
   store i64 0, i64* @g_4
   ret void
}

define dso_local void @store_g_8() nounwind {
; RV32I-LABEL: store_g_8:
; RV32I:       # %bb.0: # %entry
; RV32I-NEXT:    lui a0, %hi(g_8)
; RV32I-NEXT:    sw zero, %lo(g_8+4)(a0)
; RV32I-NEXT:    sw zero, %lo(g_8)(a0)
; RV32I-NEXT:    ret
;
; RV64I-LABEL: store_g_8:
; RV64I:       # %bb.0: # %entry
; RV64I-NEXT:    lui a0, %hi(g_8)
; RV64I-NEXT:    sd zero, %lo(g_8)(a0)
; RV64I-NEXT:    ret
entry:
   store i64 0, i64* @g_8
   ret void
}

; Check for folds in accesses to the second element of an i64 array.

@ga_8 = dso_local local_unnamed_addr global [2 x i64] zeroinitializer, align 8
@ga_16 = dso_local local_unnamed_addr global [2 x i64] zeroinitializer, align 16

define dso_local i64 @load_ga_8() nounwind {
; RV32I-LABEL: load_ga_8:
; RV32I:       # %bb.0: # %entry
; RV32I-NEXT:    lui a0, %hi(ga_8)
; RV32I-NEXT:    addi a1, a0, %lo(ga_8)
; RV32I-NEXT:    lw a0, 8(a1)
; RV32I-NEXT:    lw a1, 12(a1)
; RV32I-NEXT:    ret
;
; RV64I-LABEL: load_ga_8:
; RV64I:       # %bb.0: # %entry
; RV64I-NEXT:    lui a0, %hi(ga_8+8)
; RV64I-NEXT:    ld a0, %lo(ga_8+8)(a0)
; RV64I-NEXT:    ret
entry:
  %0 = load i64, i64* getelementptr inbounds ([2 x i64], [2 x i64]* @ga_8, i32 0, i32 1)
  ret i64 %0
}

define dso_local i64 @load_ga_16() nounwind {
; RV32I-LABEL: load_ga_16:
; RV32I:       # %bb.0: # %entry
; RV32I-NEXT:    lui a1, %hi(ga_16)
; RV32I-NEXT:    lw a0, %lo(ga_16+8)(a1)
; RV32I-NEXT:    lw a1, %lo(ga_16+12)(a1)
; RV32I-NEXT:    ret
;
; RV64I-LABEL: load_ga_16:
; RV64I:       # %bb.0: # %entry
; RV64I-NEXT:    lui a0, %hi(ga_16)
; RV64I-NEXT:    ld a0, %lo(ga_16+8)(a0)
; RV64I-NEXT:    ret
entry:
  %0 = load i64, i64* getelementptr inbounds ([2 x i64], [2 x i64]* @ga_16, i32 0, i32 1)
  ret i64 %0
}

; Check for folds in accesses to thread-local variables.

@tl_4 = dso_local thread_local global i64 0, align 4
@tl_8 = dso_local thread_local global i64 0, align 8

define dso_local i64 @load_tl_4() nounwind {
; RV32I-LABEL: load_tl_4:
; RV32I:       # %bb.0: # %entry
; RV32I-NEXT:    lui a0, %tprel_hi(tl_4)
; RV32I-NEXT:    add a1, a0, tp, %tprel_add(tl_4)
; RV32I-NEXT:    lw a0, %tprel_lo(tl_4)(a1)
; RV32I-NEXT:    addi a1, a1, %tprel_lo(tl_4)
; RV32I-NEXT:    lw a1, 4(a1)
; RV32I-NEXT:    ret
;
; RV64I-LABEL: load_tl_4:
; RV64I:       # %bb.0: # %entry
; RV64I-NEXT:    lui a0, %tprel_hi(tl_4)
; RV64I-NEXT:    add a0, a0, tp, %tprel_add(tl_4)
; RV64I-NEXT:    ld a0, %tprel_lo(tl_4)(a0)
; RV64I-NEXT:    ret
entry:
  %0 = load i64, i64* @tl_4
  ret i64 %0
}

define dso_local i64 @load_tl_8() nounwind {
; RV32I-LABEL: load_tl_8:
; RV32I:       # %bb.0: # %entry
; RV32I-NEXT:    lui a0, %tprel_hi(tl_8)
; RV32I-NEXT:    add a1, a0, tp, %tprel_add(tl_8)
; RV32I-NEXT:    lw a0, %tprel_lo(tl_8)(a1)
; RV32I-NEXT:    lw a1, %tprel_lo(tl_8+4)(a1)
; RV32I-NEXT:    ret
;
; RV64I-LABEL: load_tl_8:
; RV64I:       # %bb.0: # %entry
; RV64I-NEXT:    lui a0, %tprel_hi(tl_8)
; RV64I-NEXT:    add a0, a0, tp, %tprel_add(tl_8)
; RV64I-NEXT:    ld a0, %tprel_lo(tl_8)(a0)
; RV64I-NEXT:    ret
entry:
  %0 = load i64, i64* @tl_8
  ret i64 %0
}

define dso_local i64 @load_const_ok() nounwind {
; RV32I-LABEL: load_const_ok:
; RV32I:       # %bb.0: # %entry
; RV32I-NEXT:    lw a0, 2040(zero)
; RV32I-NEXT:    lw a1, 2044(zero)
; RV32I-NEXT:    ret
;
; RV64I-LABEL: load_const_ok:
; RV64I:       # %bb.0: # %entry
; RV64I-NEXT:    ld a0, 2040(zero)
; RV64I-NEXT:    ret
entry:
  %0 = load i64, i64* inttoptr (i32 2040 to i64*)
  ret i64 %0
}

define dso_local i64 @load_cost_overflow() nounwind {
; RV32I-LABEL: load_cost_overflow:
; RV32I:       # %bb.0: # %entry
; RV32I-NEXT:    lui a0, 1
; RV32I-NEXT:    lw a1, -2048(a0)
; RV32I-NEXT:    lw a0, 2044(zero)
; RV32I-NEXT:    ret
;
; RV64I-LABEL: load_cost_overflow:
; RV64I:       # %bb.0: # %entry
; RV64I-NEXT:    ld a0, 2044(zero)
; RV64I-NEXT:    ret
entry:
  %0 = load i64, i64* inttoptr (i64 2044 to i64*)
  ret i64 %0
}