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https://github.com/c64scene-ar/llvm-6502.git
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dd3e51dd35
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8561 91177308-0d34-0410-b5e6-96231b3b80d8
25 lines
760 B
LLVM
25 lines
760 B
LLVM
; This test contains two cast instructions that cannot be eliminated. If the
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; input of the "test" function is negative, it should be correctly converted
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; to a 32 bit version of the number with all upper 16 bits clear (ushort->uint
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; involves no sign extension). Optimizing this to a single cast is invalid!
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;
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; RUN: llvm-as < %s | opt -raise -q | lli
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;
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implementation
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uint "test"(short %argc)
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begin
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%cast223 = cast short %argc to ushort ; <ushort> [#uses=1]
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%cast114 = cast ushort %cast223 to uint ; <uint> [#uses=1]
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ret uint %cast114
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end
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int "main"()
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begin
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%Ret = call uint %test(short -1)
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%test = cast uint %Ret to int
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%Res = seteq int %test, -1 ; If it returns -1 as int, it's a failure
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%Res = cast bool %Res to int
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ret int %Res
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end
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