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| ; RUN: opt < %s -sccp -S | FileCheck %s
; Test that SCCP has basic knowledge of when div can nuke overdefined values.
; 0 / X = 0 even if X is overdefined.
; CHECK-LABEL: test1
; CHECK-NEXT: ret i32 0
define i32 @test1(i32 %foo) {
%tinkywinky = udiv i32 0, %foo
ret i32 %tinkywinky
}
; CHECK-LABEL: test2
; CHECK-NEXT: ret i32 0
define i32 @test2(i32 %foo) {
%tinkywinky = sdiv i32 0, %foo
ret i32 %tinkywinky
}
; CHECK-LABEL: test3
; CHECK: ret i32 %tinkywinky
define i32 @test3(i32 %foo) {
%tinkywinky = udiv i32 %foo, 0
ret i32 %tinkywinky
}
; CHECK-LABEL: test4
; CHECK: ret i32 %tinkywinky
define i32 @test4(i32 %foo) {
%tinkywinky = sdiv i32 %foo, 0
ret i32 %tinkywinky
}
|