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