forked from OSchip/llvm-project
[InstCombine] add tests for more variants of isPowerOf2; NFC
llvm-svn: 364227
This commit is contained in:
Sanjay Patel
parent
a612e34c14
commit
2aa800052a
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@ -306,3 +306,262 @@ define i1 @is_pow2_ctpop_wrong_pred2(i32 %x) {
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%r = and i1 %cmp2, %cmp
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ret i1 %r
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}
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; (X == 0) || (ctpop(X) u> 1) --> ctpop(X) != 1
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define i1 @isnot_pow2_ctpop(i32 %x) {
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; CHECK-LABEL: @isnot_pow2_ctpop(
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; CHECK-NEXT: [[T0:%.*]] = tail call i32 @llvm.ctpop.i32(i32 [[X:%.*]]), !range !0
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[T0]], 1
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; CHECK-NEXT: [[ISZERO:%.*]] = icmp eq i32 [[X]], 0
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; CHECK-NEXT: [[R:%.*]] = or i1 [[ISZERO]], [[CMP]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = tail call i32 @llvm.ctpop.i32(i32 %x)
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%cmp = icmp ugt i32 %t0, 1
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%iszero = icmp eq i32 %x, 0
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%r = or i1 %iszero, %cmp
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ret i1 %r
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}
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; Extra uses don't change the fold.
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define i1 @isnot_pow2_ctpop_extra_uses(i32 %x) {
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; CHECK-LABEL: @isnot_pow2_ctpop_extra_uses(
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; CHECK-NEXT: [[T0:%.*]] = tail call i32 @llvm.ctpop.i32(i32 [[X:%.*]]), !range !0
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[T0]], 1
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; CHECK-NEXT: call void @use_i1(i1 [[CMP]])
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; CHECK-NEXT: [[ISZERO:%.*]] = icmp eq i32 [[X]], 0
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; CHECK-NEXT: call void @use_i1(i1 [[ISZERO]])
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; CHECK-NEXT: [[R:%.*]] = or i1 [[ISZERO]], [[CMP]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = tail call i32 @llvm.ctpop.i32(i32 %x)
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%cmp = icmp ugt i32 %t0, 1
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call void @use_i1(i1 %cmp)
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%iszero = icmp eq i32 %x, 0
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call void @use_i1(i1 %iszero)
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%r = or i1 %iszero, %cmp
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ret i1 %r
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}
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; Test vector type and commuted 'or' operands.
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define <2 x i1> @isnot_pow2_ctpop_commute_vec(<2 x i8> %x) {
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; CHECK-LABEL: @isnot_pow2_ctpop_commute_vec(
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; CHECK-NEXT: [[T0:%.*]] = tail call <2 x i8> @llvm.ctpop.v2i8(<2 x i8> [[X:%.*]])
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt <2 x i8> [[T0]], <i8 1, i8 1>
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; CHECK-NEXT: [[ISZERO:%.*]] = icmp eq <2 x i8> [[X]], zeroinitializer
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; CHECK-NEXT: [[R:%.*]] = or <2 x i1> [[CMP]], [[ISZERO]]
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; CHECK-NEXT: ret <2 x i1> [[R]]
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;
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%t0 = tail call <2 x i8> @llvm.ctpop.v2i8(<2 x i8> %x)
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%cmp = icmp ugt <2 x i8> %t0, <i8 1, i8 1>
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%iszero = icmp eq <2 x i8> %x, zeroinitializer
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%r = or <2 x i1> %cmp, %iszero
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ret <2 x i1> %r
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}
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; Negative test - wrong constant.
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define i1 @isnot_pow2_ctpop_wrong_cmp_op1(i32 %x) {
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; CHECK-LABEL: @isnot_pow2_ctpop_wrong_cmp_op1(
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; CHECK-NEXT: [[T0:%.*]] = tail call i32 @llvm.ctpop.i32(i32 [[X:%.*]]), !range !0
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[T0]], 2
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; CHECK-NEXT: [[ISZERO:%.*]] = icmp eq i32 [[X]], 0
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; CHECK-NEXT: [[R:%.*]] = or i1 [[ISZERO]], [[CMP]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = tail call i32 @llvm.ctpop.i32(i32 %x)
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%cmp = icmp ugt i32 %t0, 2
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%iszero = icmp eq i32 %x, 0
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%r = or i1 %iszero, %cmp
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ret i1 %r
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}
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; Negative test - wrong constant.
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define i1 @isnot_pow2_ctpop_wrong_cmp_op2(i32 %x) {
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; CHECK-LABEL: @isnot_pow2_ctpop_wrong_cmp_op2(
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; CHECK-NEXT: [[T0:%.*]] = tail call i32 @llvm.ctpop.i32(i32 [[X:%.*]]), !range !0
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[T0]], 1
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; CHECK-NEXT: [[ISZERO:%.*]] = icmp eq i32 [[X]], 1
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; CHECK-NEXT: [[R:%.*]] = or i1 [[ISZERO]], [[CMP]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = tail call i32 @llvm.ctpop.i32(i32 %x)
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%cmp = icmp ugt i32 %t0, 1
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%iszero = icmp eq i32 %x, 1
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%r = or i1 %iszero, %cmp
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ret i1 %r
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}
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; Negative test - wrong predicate (but this could reduce).
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define i1 @isnot_pow2_ctpop_wrong_pred1(i32 %x) {
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; CHECK-LABEL: @isnot_pow2_ctpop_wrong_pred1(
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; CHECK-NEXT: [[T0:%.*]] = tail call i32 @llvm.ctpop.i32(i32 [[X:%.*]]), !range !0
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[T0]], 1
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; CHECK-NEXT: [[ISZERO:%.*]] = icmp eq i32 [[X]], 0
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; CHECK-NEXT: [[R:%.*]] = or i1 [[ISZERO]], [[CMP]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = tail call i32 @llvm.ctpop.i32(i32 %x)
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%cmp = icmp eq i32 %t0, 1
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%iszero = icmp eq i32 %x, 0
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%r = or i1 %iszero, %cmp
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ret i1 %r
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}
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; Negative test - wrong predicate.
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define i1 @isnot_pow2_ctpop_wrong_pred2(i32 %x) {
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; CHECK-LABEL: @isnot_pow2_ctpop_wrong_pred2(
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; CHECK-NEXT: [[T0:%.*]] = tail call i32 @llvm.ctpop.i32(i32 [[X:%.*]]), !range !0
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[T0]], 1
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; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[X]], 0
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; CHECK-NEXT: [[R:%.*]] = or i1 [[CMP2]], [[CMP]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = tail call i32 @llvm.ctpop.i32(i32 %x)
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%cmp = icmp ugt i32 %t0, 1
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%cmp2 = icmp slt i32 %x, 0
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%r = or i1 %cmp2, %cmp
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ret i1 %r
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}
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define i1 @is_pow2_negate_op(i32 %x) {
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; CHECK-LABEL: @is_pow2_negate_op(
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; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[X:%.*]], -1
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; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], [[X]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP2]], 0
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; CHECK-NEXT: [[NOTZERO:%.*]] = icmp ne i32 [[X]], 0
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; CHECK-NEXT: [[R:%.*]] = and i1 [[NOTZERO]], [[CMP]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%neg = sub i32 0, %x
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%and = and i32 %neg, %x
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%cmp = icmp eq i32 %and, %x
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%notzero = icmp ne i32 %x, 0
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%r = and i1 %notzero, %cmp
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ret i1 %r
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}
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define <2 x i1> @is_pow2_negate_op_vec(<2 x i32> %x) {
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; CHECK-LABEL: @is_pow2_negate_op_vec(
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; CHECK-NEXT: [[TMP1:%.*]] = add <2 x i32> [[X:%.*]], <i32 -1, i32 -1>
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; CHECK-NEXT: [[TMP2:%.*]] = and <2 x i32> [[TMP1]], [[X]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i32> [[TMP2]], zeroinitializer
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; CHECK-NEXT: [[NOTZERO:%.*]] = icmp ne <2 x i32> [[X]], zeroinitializer
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; CHECK-NEXT: [[R:%.*]] = and <2 x i1> [[CMP]], [[NOTZERO]]
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; CHECK-NEXT: ret <2 x i1> [[R]]
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;
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%neg = sub <2 x i32> zeroinitializer, %x
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%and = and <2 x i32> %neg, %x
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%cmp = icmp eq <2 x i32> %and, %x
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%notzero = icmp ne <2 x i32> %x, zeroinitializer
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%r = and <2 x i1> %cmp, %notzero
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ret <2 x i1> %r
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}
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define i1 @is_pow2_decrement_op(i8 %x) {
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; CHECK-LABEL: @is_pow2_decrement_op(
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; CHECK-NEXT: [[DEC:%.*]] = add i8 [[X:%.*]], -1
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; CHECK-NEXT: [[AND:%.*]] = and i8 [[DEC]], [[X]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[AND]], 0
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; CHECK-NEXT: [[NOTZERO:%.*]] = icmp ne i8 [[X]], 0
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; CHECK-NEXT: [[R:%.*]] = and i1 [[CMP]], [[NOTZERO]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%dec = add i8 %x, -1
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%and = and i8 %dec, %x
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%cmp = icmp eq i8 %and, 0
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%notzero = icmp ne i8 %x, 0
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%r = and i1 %cmp, %notzero
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ret i1 %r
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}
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define <2 x i1> @is_pow2_decrement_op_vec(<2 x i8> %x) {
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; CHECK-LABEL: @is_pow2_decrement_op_vec(
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; CHECK-NEXT: [[DEC:%.*]] = add <2 x i8> [[X:%.*]], <i8 -1, i8 -1>
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; CHECK-NEXT: [[AND:%.*]] = and <2 x i8> [[DEC]], [[X]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i8> [[AND]], zeroinitializer
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; CHECK-NEXT: [[NOTZERO:%.*]] = icmp ne <2 x i8> [[X]], zeroinitializer
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; CHECK-NEXT: [[R:%.*]] = and <2 x i1> [[NOTZERO]], [[CMP]]
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; CHECK-NEXT: ret <2 x i1> [[R]]
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;
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%dec = add <2 x i8> %x, <i8 -1, i8 -1>
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%and = and <2 x i8> %dec, %x
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%cmp = icmp eq <2 x i8> %and, zeroinitializer
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%notzero = icmp ne <2 x i8> %x, zeroinitializer
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%r = and <2 x i1> %notzero, %cmp
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ret <2 x i1> %r
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}
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define i1 @isnot_pow2_negate_op(i32 %x) {
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; CHECK-LABEL: @isnot_pow2_negate_op(
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; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[X:%.*]], -1
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; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], [[X]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[TMP2]], 0
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; CHECK-NEXT: [[ISZERO:%.*]] = icmp eq i32 [[X]], 0
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; CHECK-NEXT: [[R:%.*]] = or i1 [[CMP]], [[ISZERO]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%neg = sub i32 0, %x
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%and = and i32 %neg, %x
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%cmp = icmp ne i32 %and, %x
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%iszero = icmp eq i32 %x, 0
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%r = or i1 %cmp, %iszero
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ret i1 %r
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}
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define <2 x i1> @isnot_pow2_negate_op_vec(<2 x i32> %x) {
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; CHECK-LABEL: @isnot_pow2_negate_op_vec(
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; CHECK-NEXT: [[TMP1:%.*]] = add <2 x i32> [[X:%.*]], <i32 -1, i32 -1>
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; CHECK-NEXT: [[TMP2:%.*]] = and <2 x i32> [[TMP1]], [[X]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i32> [[TMP2]], zeroinitializer
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; CHECK-NEXT: [[ISZERO:%.*]] = icmp eq <2 x i32> [[X]], zeroinitializer
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; CHECK-NEXT: [[R:%.*]] = or <2 x i1> [[ISZERO]], [[CMP]]
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; CHECK-NEXT: ret <2 x i1> [[R]]
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;
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%neg = sub <2 x i32> zeroinitializer, %x
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%and = and <2 x i32> %neg, %x
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%cmp = icmp ne <2 x i32> %and, %x
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%iszero = icmp eq <2 x i32> %x, zeroinitializer
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%r = or <2 x i1> %iszero, %cmp
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ret <2 x i1> %r
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}
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define i1 @isnot_pow2_decrement_op(i8 %x) {
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; CHECK-LABEL: @isnot_pow2_decrement_op(
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; CHECK-NEXT: [[DEC:%.*]] = add i8 [[X:%.*]], -1
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; CHECK-NEXT: [[AND:%.*]] = and i8 [[DEC]], [[X]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp ne i8 [[AND]], 0
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; CHECK-NEXT: [[ISZERO:%.*]] = icmp eq i8 [[X]], 0
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; CHECK-NEXT: [[R:%.*]] = or i1 [[ISZERO]], [[CMP]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%dec = add i8 %x, -1
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%and = and i8 %dec, %x
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%cmp = icmp ne i8 %and, 0
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%iszero = icmp eq i8 %x, 0
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%r = or i1 %iszero, %cmp
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ret i1 %r
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}
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define <2 x i1> @isnot_pow2_decrement_op_vec(<2 x i8> %x) {
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; CHECK-LABEL: @isnot_pow2_decrement_op_vec(
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; CHECK-NEXT: [[DEC:%.*]] = add <2 x i8> [[X:%.*]], <i8 -1, i8 -1>
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; CHECK-NEXT: [[AND:%.*]] = and <2 x i8> [[DEC]], [[X]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i8> [[AND]], zeroinitializer
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; CHECK-NEXT: [[ISZERO:%.*]] = icmp eq <2 x i8> [[X]], zeroinitializer
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; CHECK-NEXT: [[R:%.*]] = or <2 x i1> [[CMP]], [[ISZERO]]
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; CHECK-NEXT: ret <2 x i1> [[R]]
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;
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%dec = add <2 x i8> %x, <i8 -1, i8 -1>
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%and = and <2 x i8> %dec, %x
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%cmp = icmp ne <2 x i8> %and, zeroinitializer
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%iszero = icmp eq <2 x i8> %x, zeroinitializer
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%r = or <2 x i1> %cmp, %iszero
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ret <2 x i1> %r
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}
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