387 lines
12 KiB
LLVM
387 lines
12 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; a & (a ^ b) --> a & ~b
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define i32 @and_xor_common_op(i32 %pa, i32 %pb) {
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; CHECK-LABEL: @and_xor_common_op(
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; CHECK-NEXT: [[A:%.*]] = udiv i32 42, [[PA:%.*]]
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; CHECK-NEXT: [[B:%.*]] = udiv i32 43, [[PB:%.*]]
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; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[B]], -1
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; CHECK-NEXT: [[R:%.*]] = and i32 [[A]], [[TMP1]]
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; CHECK-NEXT: ret i32 [[R]]
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;
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%a = udiv i32 42, %pa ; thwart complexity-based canonicalization
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%b = udiv i32 43, %pb ; thwart complexity-based canonicalization
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%xor = xor i32 %a, %b
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%r = and i32 %a, %xor
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ret i32 %r
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}
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; a & (b ^ a) --> a & ~b
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define i32 @and_xor_common_op_commute1(i32 %pa, i32 %pb) {
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; CHECK-LABEL: @and_xor_common_op_commute1(
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; CHECK-NEXT: [[A:%.*]] = udiv i32 42, [[PA:%.*]]
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; CHECK-NEXT: [[B:%.*]] = udiv i32 43, [[PB:%.*]]
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; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[B]], -1
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; CHECK-NEXT: [[R:%.*]] = and i32 [[A]], [[TMP1]]
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; CHECK-NEXT: ret i32 [[R]]
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;
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%a = udiv i32 42, %pa ; thwart complexity-based canonicalization
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%b = udiv i32 43, %pb ; thwart complexity-based canonicalization
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%xor = xor i32 %b, %a
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%r = and i32 %a, %xor
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ret i32 %r
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}
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; (b ^ a) & a --> a & ~b
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define i32 @and_xor_common_op_commute2(i32 %pa, i32 %pb) {
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; CHECK-LABEL: @and_xor_common_op_commute2(
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; CHECK-NEXT: [[A:%.*]] = udiv i32 42, [[PA:%.*]]
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; CHECK-NEXT: [[B:%.*]] = udiv i32 43, [[PB:%.*]]
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; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[B]], -1
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; CHECK-NEXT: [[R:%.*]] = and i32 [[A]], [[TMP1]]
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; CHECK-NEXT: ret i32 [[R]]
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;
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%a = udiv i32 42, %pa ; thwart complexity-based canonicalization
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%b = udiv i32 43, %pb ; thwart complexity-based canonicalization
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%xor = xor i32 %b, %a
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%r = and i32 %xor, %a
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ret i32 %r
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}
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; (a ^ b) & a --> a & ~b
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define <2 x i32> @and_xor_common_op_commute3(<2 x i32> %pa, <2 x i32> %pb) {
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; CHECK-LABEL: @and_xor_common_op_commute3(
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; CHECK-NEXT: [[A:%.*]] = udiv <2 x i32> <i32 42, i32 43>, [[PA:%.*]]
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; CHECK-NEXT: [[B:%.*]] = udiv <2 x i32> <i32 43, i32 42>, [[PB:%.*]]
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; CHECK-NEXT: [[TMP1:%.*]] = xor <2 x i32> [[B]], <i32 -1, i32 -1>
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; CHECK-NEXT: [[R:%.*]] = and <2 x i32> [[A]], [[TMP1]]
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; CHECK-NEXT: ret <2 x i32> [[R]]
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;
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%a = udiv <2 x i32> <i32 42, i32 43>, %pa ; thwart complexity-based canonicalization
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%b = udiv <2 x i32> <i32 43, i32 42>, %pb ; thwart complexity-based canonicalization
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%xor = xor <2 x i32> %a, %b
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%r = and <2 x i32> %xor, %a
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ret <2 x i32> %r
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}
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; It's ok to match a common constant.
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; The xor should be a 'not' op (-1 constant).
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define <4 x i32> @and_xor_common_op_constant(<4 x i32> %A) {
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; CHECK-LABEL: @and_xor_common_op_constant(
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; CHECK-NEXT: [[TMP1:%.*]] = xor <4 x i32> [[A:%.*]], <i32 -1, i32 -1, i32 -1, i32 -1>
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; CHECK-NEXT: [[TMP2:%.*]] = and <4 x i32> [[TMP1]], <i32 1, i32 2, i32 3, i32 4>
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; CHECK-NEXT: ret <4 x i32> [[TMP2]]
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;
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%1 = xor <4 x i32> %A, <i32 1, i32 2, i32 3, i32 4>
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%2 = and <4 x i32> <i32 1, i32 2, i32 3, i32 4>, %1
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ret <4 x i32> %2
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}
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; a & (a ^ ~b) --> a & b
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define i32 @and_xor_not_common_op(i32 %a, i32 %b) {
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; CHECK-LABEL: @and_xor_not_common_op(
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; CHECK-NEXT: [[T4:%.*]] = and i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret i32 [[T4]]
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;
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%b2 = xor i32 %b, -1
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%t2 = xor i32 %a, %b2
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%t4 = and i32 %t2, %a
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ret i32 %t4
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}
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; a & (a ^ ~b) --> a & b
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define i32 @and_xor_not_common_op_extrause(i32 %a, i32 %b, i32* %dst) {
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; CHECK-LABEL: @and_xor_not_common_op_extrause(
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; CHECK-NEXT: [[B2:%.*]] = xor i32 [[B:%.*]], -1
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; CHECK-NEXT: store i32 [[B2]], i32* [[DST:%.*]], align 4
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; CHECK-NEXT: [[T4:%.*]] = and i32 [[A:%.*]], [[B]]
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; CHECK-NEXT: ret i32 [[T4]]
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;
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%b2 = xor i32 %b, -1
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store i32 %b2, i32* %dst
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%t2 = xor i32 %a, %b2
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%t4 = and i32 %t2, %a
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ret i32 %t4
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}
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; a & ~(a ^ b) --> a & b
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define i32 @and_not_xor_common_op(i32 %a, i32 %b) {
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; CHECK-LABEL: @and_not_xor_common_op(
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; CHECK-NEXT: [[T4:%.*]] = and i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret i32 [[T4]]
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;
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%b2 = xor i32 %b, %a
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%t2 = xor i32 %b2, -1
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%t4 = and i32 %t2, %a
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ret i32 %t4
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}
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declare i32 @gen32()
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define i32 @and_not_xor_common_op_commutative(i32 %b) {
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; CHECK-LABEL: @and_not_xor_common_op_commutative(
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; CHECK-NEXT: [[A:%.*]] = call i32 @gen32()
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; CHECK-NEXT: [[T4:%.*]] = and i32 [[A]], [[B:%.*]]
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; CHECK-NEXT: ret i32 [[T4]]
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;
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%a = call i32 @gen32()
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%b2 = xor i32 %a, %b ; swapped order
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%t2 = xor i32 %b2, -1
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%t4 = and i32 %a, %t2 ; swapped order
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ret i32 %t4
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}
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; rdar://10770603
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; (x & y) | (x ^ y) -> x | y
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define i64 @or(i64 %x, i64 %y) {
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; CHECK-LABEL: @or(
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; CHECK-NEXT: [[TMP1:%.*]] = or i64 [[Y:%.*]], [[X:%.*]]
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; CHECK-NEXT: ret i64 [[TMP1]]
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;
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%1 = and i64 %y, %x
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%2 = xor i64 %y, %x
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%3 = add i64 %1, %2
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ret i64 %3
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}
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; (x & y) + (x ^ y) -> x | y
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define i64 @or2(i64 %x, i64 %y) {
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; CHECK-LABEL: @or2(
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; CHECK-NEXT: [[TMP1:%.*]] = or i64 [[Y:%.*]], [[X:%.*]]
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; CHECK-NEXT: ret i64 [[TMP1]]
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;
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%1 = and i64 %y, %x
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%2 = xor i64 %y, %x
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%3 = or i64 %1, %2
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ret i64 %3
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}
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; PR37098 - https://bugs.llvm.org/show_bug.cgi?id=37098
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; Reassociate bitwise logic to eliminate a shift.
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; There are 4 commuted * 3 shift ops * 3 logic ops = 36 potential variations of this fold.
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; Mix the commutation options to provide coverage using less tests.
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define i8 @and_shl(i8 %x, i8 %y, i8 %z, i8 %shamt) {
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; CHECK-LABEL: @and_shl(
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; CHECK-NEXT: [[SX:%.*]] = shl i8 [[X:%.*]], [[SHAMT:%.*]]
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; CHECK-NEXT: [[SY:%.*]] = shl i8 [[Y:%.*]], [[SHAMT]]
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; CHECK-NEXT: [[A:%.*]] = and i8 [[SX]], [[Z:%.*]]
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; CHECK-NEXT: [[R:%.*]] = and i8 [[SY]], [[A]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%sx = shl i8 %x, %shamt
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%sy = shl i8 %y, %shamt
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%a = and i8 %sx, %z
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%r = and i8 %sy, %a
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ret i8 %r
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}
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define i8 @or_shl(i8 %x, i8 %y, i8 %z, i8 %shamt) {
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; CHECK-LABEL: @or_shl(
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; CHECK-NEXT: [[SX:%.*]] = shl i8 [[X:%.*]], [[SHAMT:%.*]]
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; CHECK-NEXT: [[SY:%.*]] = shl i8 [[Y:%.*]], [[SHAMT]]
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; CHECK-NEXT: [[A:%.*]] = or i8 [[SX]], [[Z:%.*]]
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; CHECK-NEXT: [[R:%.*]] = or i8 [[A]], [[SY]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%sx = shl i8 %x, %shamt
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%sy = shl i8 %y, %shamt
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%a = or i8 %sx, %z
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%r = or i8 %a, %sy
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ret i8 %r
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}
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define i8 @xor_shl(i8 %x, i8 %y, i8 %zarg, i8 %shamt) {
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; CHECK-LABEL: @xor_shl(
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; CHECK-NEXT: [[Z:%.*]] = sdiv i8 42, [[ZARG:%.*]]
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; CHECK-NEXT: [[SX:%.*]] = shl i8 [[X:%.*]], [[SHAMT:%.*]]
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; CHECK-NEXT: [[SY:%.*]] = shl i8 [[Y:%.*]], [[SHAMT]]
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; CHECK-NEXT: [[A:%.*]] = xor i8 [[Z]], [[SX]]
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; CHECK-NEXT: [[R:%.*]] = xor i8 [[A]], [[SY]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%z = sdiv i8 42, %zarg ; thwart complexity-based canonicalization
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%sx = shl i8 %x, %shamt
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%sy = shl i8 %y, %shamt
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%a = xor i8 %z, %sx
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%r = xor i8 %a, %sy
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ret i8 %r
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}
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define i8 @and_lshr(i8 %x, i8 %y, i8 %zarg, i8 %shamt) {
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; CHECK-LABEL: @and_lshr(
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; CHECK-NEXT: [[Z:%.*]] = sdiv i8 42, [[ZARG:%.*]]
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; CHECK-NEXT: [[SX:%.*]] = lshr i8 [[X:%.*]], [[SHAMT:%.*]]
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; CHECK-NEXT: [[SY:%.*]] = lshr i8 [[Y:%.*]], [[SHAMT]]
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; CHECK-NEXT: [[A:%.*]] = and i8 [[Z]], [[SX]]
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; CHECK-NEXT: [[R:%.*]] = and i8 [[SY]], [[A]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%z = sdiv i8 42, %zarg ; thwart complexity-based canonicalization
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%sx = lshr i8 %x, %shamt
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%sy = lshr i8 %y, %shamt
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%a = and i8 %z, %sx
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%r = and i8 %sy, %a
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ret i8 %r
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}
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define i8 @or_lshr(i8 %x, i8 %y, i8 %z, i8 %shamt) {
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; CHECK-LABEL: @or_lshr(
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; CHECK-NEXT: [[SX:%.*]] = lshr i8 [[X:%.*]], [[SHAMT:%.*]]
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; CHECK-NEXT: [[SY:%.*]] = lshr i8 [[Y:%.*]], [[SHAMT]]
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; CHECK-NEXT: [[A:%.*]] = or i8 [[SX]], [[Z:%.*]]
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; CHECK-NEXT: [[R:%.*]] = or i8 [[SY]], [[A]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%sx = lshr i8 %x, %shamt
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%sy = lshr i8 %y, %shamt
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%a = or i8 %sx, %z
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%r = or i8 %sy, %a
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ret i8 %r
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}
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define i8 @xor_lshr(i8 %x, i8 %y, i8 %z, i8 %shamt) {
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; CHECK-LABEL: @xor_lshr(
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; CHECK-NEXT: [[SX:%.*]] = lshr i8 [[X:%.*]], [[SHAMT:%.*]]
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; CHECK-NEXT: [[SY:%.*]] = lshr i8 [[Y:%.*]], [[SHAMT]]
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; CHECK-NEXT: [[A:%.*]] = xor i8 [[SX]], [[Z:%.*]]
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; CHECK-NEXT: [[R:%.*]] = xor i8 [[A]], [[SY]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%sx = lshr i8 %x, %shamt
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%sy = lshr i8 %y, %shamt
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%a = xor i8 %sx, %z
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%r = xor i8 %a, %sy
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ret i8 %r
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}
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define i8 @and_ashr(i8 %x, i8 %y, i8 %zarg, i8 %shamt) {
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; CHECK-LABEL: @and_ashr(
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; CHECK-NEXT: [[Z:%.*]] = sdiv i8 42, [[ZARG:%.*]]
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; CHECK-NEXT: [[SX:%.*]] = ashr i8 [[X:%.*]], [[SHAMT:%.*]]
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; CHECK-NEXT: [[SY:%.*]] = ashr i8 [[Y:%.*]], [[SHAMT]]
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; CHECK-NEXT: [[A:%.*]] = and i8 [[Z]], [[SX]]
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; CHECK-NEXT: [[R:%.*]] = and i8 [[A]], [[SY]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%z = sdiv i8 42, %zarg ; thwart complexity-based canonicalization
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%sx = ashr i8 %x, %shamt
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%sy = ashr i8 %y, %shamt
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%a = and i8 %z, %sx
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%r = and i8 %a, %sy
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ret i8 %r
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}
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define i8 @or_ashr(i8 %x, i8 %y, i8 %zarg, i8 %shamt) {
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; CHECK-LABEL: @or_ashr(
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; CHECK-NEXT: [[Z:%.*]] = sdiv i8 42, [[ZARG:%.*]]
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; CHECK-NEXT: [[SX:%.*]] = ashr i8 [[X:%.*]], [[SHAMT:%.*]]
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; CHECK-NEXT: [[SY:%.*]] = ashr i8 [[Y:%.*]], [[SHAMT]]
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; CHECK-NEXT: [[A:%.*]] = or i8 [[Z]], [[SX]]
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; CHECK-NEXT: [[R:%.*]] = or i8 [[SY]], [[A]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%z = sdiv i8 42, %zarg ; thwart complexity-based canonicalization
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%sx = ashr i8 %x, %shamt
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%sy = ashr i8 %y, %shamt
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%a = or i8 %z, %sx
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%r = or i8 %sy, %a
|
||
|
|
ret i8 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i8> @xor_ashr(<2 x i8> %x, <2 x i8> %y, <2 x i8> %z, <2 x i8> %shamt) {
|
||
|
|
; CHECK-LABEL: @xor_ashr(
|
||
|
|
; CHECK-NEXT: [[SX:%.*]] = ashr <2 x i8> [[X:%.*]], [[SHAMT:%.*]]
|
||
|
|
; CHECK-NEXT: [[SY:%.*]] = ashr <2 x i8> [[Y:%.*]], [[SHAMT]]
|
||
|
|
; CHECK-NEXT: [[A:%.*]] = xor <2 x i8> [[SX]], [[Z:%.*]]
|
||
|
|
; CHECK-NEXT: [[R:%.*]] = xor <2 x i8> [[A]], [[SY]]
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[R]]
|
||
|
|
;
|
||
|
|
%sx = ashr <2 x i8> %x, %shamt
|
||
|
|
%sy = ashr <2 x i8> %y, %shamt
|
||
|
|
%a = xor <2 x i8> %sx, %z
|
||
|
|
%r = xor <2 x i8> %a, %sy
|
||
|
|
ret <2 x i8> %r
|
||
|
|
}
|
||
|
|
|
||
|
|
; Negative test - different logic ops
|
||
|
|
|
||
|
|
define i8 @or_and_shl(i8 %x, i8 %y, i8 %z, i8 %shamt) {
|
||
|
|
; CHECK-LABEL: @or_and_shl(
|
||
|
|
; CHECK-NEXT: [[SX:%.*]] = shl i8 [[X:%.*]], [[SHAMT:%.*]]
|
||
|
|
; CHECK-NEXT: [[SY:%.*]] = shl i8 [[Y:%.*]], [[SHAMT]]
|
||
|
|
; CHECK-NEXT: [[A:%.*]] = or i8 [[SX]], [[Z:%.*]]
|
||
|
|
; CHECK-NEXT: [[R:%.*]] = and i8 [[SY]], [[A]]
|
||
|
|
; CHECK-NEXT: ret i8 [[R]]
|
||
|
|
;
|
||
|
|
%sx = shl i8 %x, %shamt
|
||
|
|
%sy = shl i8 %y, %shamt
|
||
|
|
%a = or i8 %sx, %z
|
||
|
|
%r = and i8 %sy, %a
|
||
|
|
ret i8 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
; Negative test - different shift ops
|
||
|
|
|
||
|
|
define i8 @or_lshr_shl(i8 %x, i8 %y, i8 %z, i8 %shamt) {
|
||
|
|
; CHECK-LABEL: @or_lshr_shl(
|
||
|
|
; CHECK-NEXT: [[SX:%.*]] = lshr i8 [[X:%.*]], [[SHAMT:%.*]]
|
||
|
|
; CHECK-NEXT: [[SY:%.*]] = shl i8 [[Y:%.*]], [[SHAMT]]
|
||
|
|
; CHECK-NEXT: [[A:%.*]] = or i8 [[SX]], [[Z:%.*]]
|
||
|
|
; CHECK-NEXT: [[R:%.*]] = or i8 [[A]], [[SY]]
|
||
|
|
; CHECK-NEXT: ret i8 [[R]]
|
||
|
|
;
|
||
|
|
%sx = lshr i8 %x, %shamt
|
||
|
|
%sy = shl i8 %y, %shamt
|
||
|
|
%a = or i8 %sx, %z
|
||
|
|
%r = or i8 %a, %sy
|
||
|
|
ret i8 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
; Negative test - different shift amounts
|
||
|
|
|
||
|
|
define i8 @or_lshr_shamt2(i8 %x, i8 %y, i8 %z, i8 %shamt) {
|
||
|
|
; CHECK-LABEL: @or_lshr_shamt2(
|
||
|
|
; CHECK-NEXT: [[SX:%.*]] = lshr i8 [[X:%.*]], 5
|
||
|
|
; CHECK-NEXT: [[SY:%.*]] = lshr i8 [[Y:%.*]], [[SHAMT:%.*]]
|
||
|
|
; CHECK-NEXT: [[A:%.*]] = or i8 [[SX]], [[Z:%.*]]
|
||
|
|
; CHECK-NEXT: [[R:%.*]] = or i8 [[SY]], [[A]]
|
||
|
|
; CHECK-NEXT: ret i8 [[R]]
|
||
|
|
;
|
||
|
|
%sx = lshr i8 %x, 5
|
||
|
|
%sy = lshr i8 %y, %shamt
|
||
|
|
%a = or i8 %sx, %z
|
||
|
|
%r = or i8 %sy, %a
|
||
|
|
ret i8 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
; Negative test - multi-use
|
||
|
|
|
||
|
|
define i8 @xor_lshr_multiuse(i8 %x, i8 %y, i8 %z, i8 %shamt) {
|
||
|
|
; CHECK-LABEL: @xor_lshr_multiuse(
|
||
|
|
; CHECK-NEXT: [[SX:%.*]] = lshr i8 [[X:%.*]], [[SHAMT:%.*]]
|
||
|
|
; CHECK-NEXT: [[SY:%.*]] = lshr i8 [[Y:%.*]], [[SHAMT]]
|
||
|
|
; CHECK-NEXT: [[A:%.*]] = xor i8 [[SX]], [[Z:%.*]]
|
||
|
|
; CHECK-NEXT: [[R:%.*]] = xor i8 [[A]], [[SY]]
|
||
|
|
; CHECK-NEXT: [[R2:%.*]] = sdiv i8 [[A]], [[R]]
|
||
|
|
; CHECK-NEXT: ret i8 [[R2]]
|
||
|
|
;
|
||
|
|
%sx = lshr i8 %x, %shamt
|
||
|
|
%sy = lshr i8 %y, %shamt
|
||
|
|
%a = xor i8 %sx, %z
|
||
|
|
%r = xor i8 %a, %sy
|
||
|
|
%r2 = sdiv i8 %a, %r
|
||
|
|
ret i8 %r2
|
||
|
|
}
|
||
|
|
|