1 ; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -O0
3 ; When WZR wasn't marked as reserved, this function tried to allocate
4 ; it at O0 and then generated an internal fault (mostly incidentally)
5 ; when it discovered that it was already in use for a multiplication.
7 ; I'm not really convinced this is a good test since it could easily
8 ; stop testing what it does now with no-one any the wiser. However, I
9 ; can't think of a better way to force the allocator to use WZR
12 define void @test() nounwind {
16 for.cond: ; preds = %for.body, %entry
17 br i1 undef, label %for.body, label %for.end
19 for.body: ; preds = %for.cond
22 for.end: ; preds = %for.cond
25 for.cond6: ; preds = %for.body9, %for.end
26 br i1 undef, label %for.body9, label %while.cond30
28 for.body9: ; preds = %for.cond6
29 store i16 0, i16* undef, align 2
30 %0 = load i32* undef, align 4
31 %1 = load i32* undef, align 4
32 %mul15 = mul i32 %0, %1
33 %add16 = add i32 %mul15, 32768
34 %div = udiv i32 %add16, 65535
35 %add17 = add i32 %div, 1
36 store i32 %add17, i32* undef, align 4
39 while.cond30: ; preds = %for.cond6