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Imported Upstream version 5.18.0.167
Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a
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; RUN: opt < %s -sccp -S | FileCheck %s
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; Test that SCCP has basic knowledge of when and/or/mul nuke overdefined values.
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; CHECK-LABEL: test
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; CHECK: ret i32 0
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define i32 @test(i32 %X) {
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%Y = and i32 %X, 0
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ret i32 %Y
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}
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; CHECK-LABEL: test2
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; CHECK: ret i32 -1
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define i32 @test2(i32 %X) {
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%Y = or i32 -1, %X
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ret i32 %Y
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}
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; CHECK-LABEL: test3
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; CHECK: ret i32 0
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define i32 @test3(i32 %X) {
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%Y = and i32 undef, %X
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ret i32 %Y
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}
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; CHECK-LABEL: test4
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; CHECK: ret i32 -1
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define i32 @test4(i32 %X) {
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%Y = or i32 %X, undef
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ret i32 %Y
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}
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; X * 0 = 0 even if X is overdefined.
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; CHECK-LABEL: test5
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; CHECK: ret i32 0
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define i32 @test5(i32 %foo) {
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%patatino = mul i32 %foo, 0
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ret i32 %patatino
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}
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