xref: /llvm-project/llvm/test/CodeGen/RISCV/rvv/fixed-vectors-store-merge-crash.ll (revision 74f985b793bf4005e49736f8c2cef8b5cbf7c1ab)
1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2; RUN: llc < %s -mtriple=riscv64 -mattr=+zbb,+v | FileCheck %s
3
4; This test loads to values and stores them in reversed order. This previously
5; asserted because part of DAGCombiner::tryStoreMerge thinks we can use an i64
6; rotate, but the loads aren't sufficiently aligned. So then it tried to use
7; a vector type, but that can't handle the swapped case.
8
9@foo = global [2 x i32] zeroinitializer, align 4
10@bar = global [2 x i32] zeroinitializer, align 4
11
12define void @baz() nounwind {
13; CHECK-LABEL: baz:
14; CHECK:       # %bb.0: # %entry
15; CHECK-NEXT:    lui a0, %hi(foo)
16; CHECK-NEXT:    addi a1, a0, %lo(foo)
17; CHECK-NEXT:    lw a1, 4(a1)
18; CHECK-NEXT:    lw a0, %lo(foo)(a0)
19; CHECK-NEXT:    lui a2, %hi(bar)
20; CHECK-NEXT:    sw a1, %lo(bar)(a2)
21; CHECK-NEXT:    addi a1, a2, %lo(bar)
22; CHECK-NEXT:    sw a0, 4(a1)
23; CHECK-NEXT:    ret
24entry:
25  %0 = load i32, ptr getelementptr inbounds ([2 x i32], ptr @foo, i64 0, i64 1), align 4
26  store i32 %0, ptr @bar, align 4
27  %1 = load i32, ptr @foo, align 4
28  store i32 %1, ptr getelementptr inbounds ([2 x i32], ptr @bar, i64 0, i64 1), align 4
29  ret void
30}
31