known-bits.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -instcombine < %s | FileCheck %s
define void @test_shl(i1 %x) {
; CHECK-LABEL: @test_shl(
; CHECK-NEXT: call void @sink(i8 0)
; CHECK-NEXT: ret void
;
%y = zext i1 %x to i8
%z = shl i8 64, %y
%a = and i8 %z, 1
call void @sink(i8 %a)
ret void
}
define void @test_lshr(i1 %x) {
; CHECK-LABEL: @test_lshr(
; CHECK-NEXT: call void @sink(i8 0)
; CHECK-NEXT: ret void
;
%y = zext i1 %x to i8
%z = lshr i8 64, %y
%a = and i8 %z, 1
call void @sink(i8 %a)
ret void
}
define void @test_ashr(i1 %x) {
; CHECK-LABEL: @test_ashr(
; CHECK-NEXT: call void @sink(i8 0)
; CHECK-NEXT: ret void
;
%y = zext i1 %x to i8
%z = ashr i8 -16, %y
%a = and i8 %z, 3
call void @sink(i8 %a)
ret void
}
define void @test_udiv(i8 %x) {
; CHECK-LABEL: @test_udiv(
; CHECK-NEXT: call void @sink(i8 0)
; CHECK-NEXT: ret void
;
%y = udiv i8 10, %x
%z = and i8 %y, 64
call void @sink(i8 %z)
ret void
}
declare void @sink(i8)