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16 lines
756 B
LLVM
16 lines
756 B
LLVM
; PR1280 - we should be able to reduce this function to a trunc/sext but it
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; would involve using a bit width (24) that doesn't match a size that
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; the back end can handle. This test makes sure that such a transform
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; is not done. It should be removed when code gen supports "funny"
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; bit widths.
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {add i49.*-8388608}
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define i49 @test5(i49 %x) {
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;; If we have ADD(XOR(AND(X, 0xFF), 0x80), 0xF..F80), it's a sext.
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%X = and i49 %x, 16777215 ; 0x0000000ffffff
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%tmp.2 = xor i49 %X, 8388608 ; 0x0000000800000
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%tmp.4 = add i49 %tmp.2, -8388608 ; 0x1FFFFFF800000
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ret i49 %tmp.4
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}
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