xref: /llvm-project/llvm/test/Transforms/LoopUnroll/RISCV/invalid-cost.ll (revision ef992b60798b6cd2c50b25351bfc392e319896b7)
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt %s -S -mtriple=riscv64 -passes=loop-unroll | FileCheck %s
3
4; Demonstrate handling of invalid costs in LoopUnroll.  This test uses
5; scalable vectors on RISCV w/o +V to create a situation where a construct
6; can not be lowered, and is thus invalid regardless of what the target
7; does or does not implement in terms of a cost model.
8
9target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n64-S128"
10target triple = "riscv64-unknown-unknown"
11
12define void @invalid(ptr %p) nounwind ssp {
13; CHECK-LABEL: @invalid(
14; CHECK-NEXT:  entry:
15; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
16; CHECK:       for.body:
17; CHECK-NEXT:    [[I_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY]] ]
18; CHECK-NEXT:    [[A:%.*]] = load <vscale x 1 x i8>, ptr [[P:%.*]], align 1
19; CHECK-NEXT:    [[B:%.*]] = add <vscale x 1 x i8> [[A]], [[A]]
20; CHECK-NEXT:    store <vscale x 1 x i8> [[B]], ptr [[P]], align 1
21; CHECK-NEXT:    [[INC]] = add nsw i32 [[I_0]], 1
22; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[I_0]], 10
23; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END:%.*]]
24; CHECK:       for.end:
25; CHECK-NEXT:    ret void
26;
27entry:
28  br label %for.body
29
30for.body:                                         ; preds = %for.body, %entry
31  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
32  %a = load <vscale x 1 x i8>, ptr %p
33  %b = add <vscale x 1 x i8> %a, %a
34  store <vscale x 1 x i8> %b, ptr %p
35  %inc = add nsw i32 %i.0, 1
36  %cmp = icmp slt i32 %i.0, 10
37  br i1 %cmp, label %for.body, label %for.end
38
39for.end:                                          ; preds = %for.body
40  ret void
41}
42
43
44declare void @f()
45