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45 lines
945 B
LLVM
45 lines
945 B
LLVM
; This test makes sure that these instructions are properly eliminated.
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; RUN: opt < %s -instcombine -S | not grep select
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define i41 @test1(i1 %C) {
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%V = select i1 %C, i41 1, i41 0 ; V = C
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ret i41 %V
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}
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define i999 @test2(i1 %C) {
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%V = select i1 %C, i999 0, i999 1 ; V = C
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ret i999 %V
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}
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define i41 @test3(i41 %X) {
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;; (x <s 0) ? -1 : 0 -> ashr x, 31
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%t = icmp slt i41 %X, 0
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%V = select i1 %t, i41 -1, i41 0
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ret i41 %V
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}
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define i1023 @test4(i1023 %X) {
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;; (x <s 0) ? -1 : 0 -> ashr x, 31
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%t = icmp slt i1023 %X, 0
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%V = select i1 %t, i1023 -1, i1023 0
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ret i1023 %V
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}
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define i41 @test5(i41 %X) {
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;; ((X & 27) ? 27 : 0)
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%Y = and i41 %X, 32
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%t = icmp ne i41 %Y, 0
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%V = select i1 %t, i41 32, i41 0
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ret i41 %V
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}
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define i1023 @test6(i1023 %X) {
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;; ((X & 27) ? 27 : 0)
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%Y = and i1023 %X, 64
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%t = icmp ne i1023 %Y, 0
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%V = select i1 %t, i1023 64, i1023 0
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ret i1023 %V
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}
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