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; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -O0
; Skipping for arm64, there's no evidence it would ever have hit the same
; problem.
; When WZR wasn't marked as reserved, this function tried to allocate
; it at O0 and then generated an internal fault (mostly incidentally)
; when it discovered that it was already in use for a multiplication.
; I'm not really convinced this is a good test since it could easily
; stop testing what it does now with no-one any the wiser. However, I
; can't think of a better way to force the allocator to use WZR
; specifically.
define void @test() nounwind {
entry:
br label %for.cond
for.cond: ; preds = %for.body, %entry
br i1 undef, label %for.body, label %for.end
for.body: ; preds = %for.cond
br label %for.cond
for.end: ; preds = %for.cond
br label %for.cond6
for.cond6: ; preds = %for.body9, %for.end
br i1 undef, label %for.body9, label %while.cond30
for.body9: ; preds = %for.cond6
store i16 0, i16* undef, align 2
%0 = load i32* undef, align 4
%1 = load i32* undef, align 4
%mul15 = mul i32 %0, %1
%add16 = add i32 %mul15, 32768
%div = udiv i32 %add16, 65535
%add17 = add i32 %div, 1
store i32 %add17, i32* undef, align 4
br label %for.cond6
while.cond30: ; preds = %for.cond6
ret void
}
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