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35 lines
910 B
35 lines
910 B
4 months ago
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; This test makes sure that add instructions are properly eliminated.
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; This test is for Integer BitWidth <= 64 && BitWidth % 8 != 0.
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; RUN: opt < %s -instcombine -S | \
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; RUN: grep -v OK | not grep add
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define i1 @test1(i1 %x) {
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%tmp.2 = xor i1 %x, 1
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;; Add of sign bit -> xor of sign bit.
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%tmp.4 = add i1 %tmp.2, 1
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ret i1 %tmp.4
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}
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define i47 @test2(i47 %x) {
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%tmp.2 = xor i47 %x, 70368744177664
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;; Add of sign bit -> xor of sign bit.
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%tmp.4 = add i47 %tmp.2, 70368744177664
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ret i47 %tmp.4
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}
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define i15 @test3(i15 %x) {
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%tmp.2 = xor i15 %x, 16384
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;; Add of sign bit -> xor of sign bit.
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%tmp.4 = add i15 %tmp.2, 16384
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ret i15 %tmp.4
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}
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define i49 @test6(i49 %x) {
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;; (x & 254)+1 -> (x & 254)|1
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%tmp.2 = and i49 %x, 562949953421310
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%tmp.4 = add i49 %tmp.2, 1
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ret i49 %tmp.4
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}
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