1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2 ; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s \
3 ; RUN: | FileCheck %s -check-prefix=RV32I
5 @a = global [4096 x i32] zeroinitializer, align 4
6 @b = global [4096 x i32] zeroinitializer, align 4
8 ; This test demonstrates very slightly improved codegen in the case that
9 ; a correct isLegalAddImmediate is implemented, thanks to LoopStrengthReduce.
11 define i32 @main() nounwind {
13 ; RV32I: # %bb.0: # %entry
14 ; RV32I-NEXT: mv a0, zero
15 ; RV32I-NEXT: lui a1, %hi(b)
16 ; RV32I-NEXT: addi a1, a1, %lo(b)
17 ; RV32I-NEXT: lui a2, %hi(a)
18 ; RV32I-NEXT: addi a2, a2, %lo(a)
19 ; RV32I-NEXT: lui a3, 1
20 ; RV32I-NEXT: .LBB0_1: # %for.body
21 ; RV32I-NEXT: # =>This Inner Loop Header: Depth=1
22 ; RV32I-NEXT: addi a4, a0, -2048
23 ; RV32I-NEXT: sw a4, 0(a2)
24 ; RV32I-NEXT: sw a0, 0(a1)
25 ; RV32I-NEXT: addi a0, a0, 1
26 ; RV32I-NEXT: addi a1, a1, 4
27 ; RV32I-NEXT: addi a2, a2, 4
28 ; RV32I-NEXT: bne a0, a3, .LBB0_1
29 ; RV32I-NEXT: # %bb.2: # %for.end
30 ; RV32I-NEXT: mv a0, zero
36 %i.08 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
37 %sub = add nsw i32 %i.08, -2048
38 %arrayidx = getelementptr inbounds [4096 x i32], [4096 x i32]* @a, i32 0, i32 %i.08
39 store i32 %sub, i32* %arrayidx, align 4
40 %arrayidx1 = getelementptr inbounds [4096 x i32], [4096 x i32]* @b, i32 0, i32 %i.08
41 store i32 %i.08, i32* %arrayidx1, align 4
42 %inc = add nuw nsw i32 %i.08, 1
43 %exitcond = icmp eq i32 %inc, 4096
44 br i1 %exitcond, label %for.end, label %for.body