Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/Analysis/ValueTracking/known-signbit-shift.ll

@@ -1,49 +0,0 @@
-; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -instcombine -S | FileCheck %s
-
-; Result of left shifting a non-negative integer
-; with nsw flag should also be non-negative
-define i1 @test_shift_nonnegative(i32 %a) {
-; CHECK-LABEL: @test_shift_nonnegative(
-; CHECK-NEXT:    ret i1 true
-;
-  %b = lshr i32 %a, 2
-  %shift = shl nsw i32 %b, 3
-  %cmp = icmp sge i32 %shift, 0
-  ret i1 %cmp
-}
-
-; Result of left shifting a negative integer with
-; nsw flag should also be negative
-define i1 @test_shift_negative(i32 %a, i32 %b) {
-; CHECK-LABEL: @test_shift_negative(
-; CHECK-NEXT:    ret i1 true
-;
-  %c = or i32 %a, -2147483648
-  %d = and i32 %b, 7
-  %shift = shl nsw i32 %c, %d
-  %cmp = icmp slt i32 %shift, 0
-  ret i1 %cmp
-}
-
-; If sign bit is a known zero, it cannot be a known one.
-; This test should not crash opt. The shift produces poison.
-define i32 @test_no_sign_bit_conflict1(i1 %b) {
-; CHECK-LABEL: @test_no_sign_bit_conflict1(
-; CHECK-NEXT:    ret i32 0
-;
-  %sel = select i1 %b, i32 8193, i32 8192
-  %mul = shl nsw i32 %sel, 18
-  ret i32 %mul
-}
-
-; If sign bit is a known one, it cannot be a known zero.
-; This test should not crash opt. The shift produces poison.
-define i32 @test_no_sign_bit_conflict2(i1 %b) {
-; CHECK-LABEL: @test_no_sign_bit_conflict2(
-; CHECK-NEXT:    ret i32 0
-;
-  %sel = select i1 %b, i32 -8193, i32 -8194
-  %mul = shl nsw i32 %sel, 18
-  ret i32 %mul
-}