diff --git a/llvm/test/Transforms/InstCombine/eq-of-parts.ll b/llvm/test/Transforms/InstCombine/eq-of-parts.ll index 00ee7bf64328..9494dd6bf8e5 100644 --- a/llvm/test/Transforms/InstCombine/eq-of-parts.ll +++ b/llvm/test/Transforms/InstCombine/eq-of-parts.ll @@ -1538,3 +1538,28 @@ define i1 @or_trunc_i1_wrong_operands(i64 %a1, i64 %a2, i64 %a3) { %or = or i1 %cmp, %trunc ret i1 %or } + +define i1 @jv_identical(i64 %arg1, i64 %arg2) { +; CHECK-LABEL: @jv_identical( +; CHECK-NEXT: [[ARG1_TRUNC:%.*]] = trunc i64 [[ARG1:%.*]] to i8 +; CHECK-NEXT: [[ARG2_TRUNC:%.*]] = trunc i64 [[ARG2:%.*]] to i8 +; CHECK-NEXT: [[EQ1:%.*]] = icmp eq i8 [[ARG1_TRUNC]], [[ARG2_TRUNC]] +; CHECK-NEXT: [[DOTUNSHIFTED:%.*]] = xor i64 [[ARG2]], [[ARG1]] +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i64 [[DOTUNSHIFTED]], 65536 +; CHECK-NEXT: [[AND2:%.*]] = and i1 [[EQ1]], [[TMP1]] +; CHECK-NEXT: ret i1 [[AND2]] +; + %arg1.trunc = trunc i64 %arg1 to i8 + %arg1.shift = lshr i64 %arg1, 16 + %arg1.shift.trunc = trunc i64 %arg1.shift to i16 + %arg2.trunc = trunc i64 %arg2 to i8 + %arg2.shift = lshr i64 %arg2, 16 + %arg2.shift.trunc = trunc i64 %arg2.shift to i16 + %eq1 = icmp eq i8 %arg1.trunc, %arg2.trunc + %eq2 = icmp eq i16 %arg1.shift.trunc, %arg2.shift.trunc + %and1 = and i1 %eq1, %eq2 + %xor = xor i64 %arg2, %arg1 + %cmp = icmp ult i64 %xor, 4294967296 + %and2 = and i1 %cmp, %and1 + ret i1 %and2 +}