forked from OSchip/llvm-project
[ValueTracking] Add tests for non equal shifts (NFC)
This commit is contained in:
Nikita Popov
parent
8bc2c662d9
commit
5c85c37c87
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@ -343,4 +343,164 @@ exit:
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ret i1 %cmp
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}
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define i1 @shl_nuw(i16 %x) {
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; CHECK-LABEL: @shl_nuw(
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; CHECK-NEXT: [[NZ:%.*]] = or i16 [[X:%.*]], 2
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; CHECK-NEXT: [[MUL:%.*]] = shl nuw i16 [[NZ]], 1
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i16 [[NZ]], [[MUL]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%nz = or i16 %x, 2
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%mul = shl nuw i16 %nz, 1
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%cmp = icmp eq i16 %nz, %mul
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ret i1 %cmp
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}
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define i1 @shl_nsw(i16 %x) {
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; CHECK-LABEL: @shl_nsw(
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; CHECK-NEXT: [[NZ:%.*]] = or i16 [[X:%.*]], 2
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; CHECK-NEXT: [[MUL:%.*]] = shl nsw i16 [[NZ]], 1
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i16 [[NZ]], [[MUL]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%nz = or i16 %x, 2
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%mul = shl nsw i16 %nz, 1
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%cmp = icmp eq i16 %nz, %mul
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ret i1 %cmp
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}
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define i1 @shl_may_wrap(i16 %x) {
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; CHECK-LABEL: @shl_may_wrap(
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; CHECK-NEXT: [[NZ:%.*]] = or i16 [[X:%.*]], 2
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; CHECK-NEXT: [[MUL:%.*]] = shl i16 [[NZ]], 1
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i16 [[NZ]], [[MUL]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%nz = or i16 %x, 2
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%mul = shl i16 %nz, 1
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%cmp = icmp eq i16 %nz, %mul
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ret i1 %cmp
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}
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define i1 @shl_shift_may_be_zero(i16 %x, i16 %shift) {
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; CHECK-LABEL: @shl_shift_may_be_zero(
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; CHECK-NEXT: [[NZ:%.*]] = or i16 [[X:%.*]], 2
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; CHECK-NEXT: [[MUL:%.*]] = shl nuw i16 [[NZ]], [[SHIFT:%.*]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i16 [[NZ]], [[MUL]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%nz = or i16 %x, 2
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%mul = shl nuw i16 %nz, %shift
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%cmp = icmp eq i16 %nz, %mul
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ret i1 %cmp
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}
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define i1 @shl_op_may_be_zero(i16 %x) {
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; CHECK-LABEL: @shl_op_may_be_zero(
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; CHECK-NEXT: [[MUL:%.*]] = shl nuw i16 [[X:%.*]], 1
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i16 [[X]], [[MUL]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%mul = shl nuw i16 %x, 1
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%cmp = icmp eq i16 %x, %mul
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ret i1 %cmp
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}
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; The additional muls in these tests are necessary to actually
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; test the isKnownNonEqual() code, rather than InstSimplify's own
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; comparison folding.
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define i1 @shl_shl_nuw(i8 %B, i8 %shift) {
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; CHECK-LABEL: @shl_shl_nuw(
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; CHECK-NEXT: [[A:%.*]] = add i8 [[B:%.*]], 1
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; CHECK-NEXT: [[A_OP:%.*]] = shl nuw i8 [[A]], [[SHIFT:%.*]]
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; CHECK-NEXT: [[B_OP:%.*]] = shl nuw i8 [[B]], [[SHIFT]]
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; CHECK-NEXT: [[A_OP2:%.*]] = mul nuw i8 [[A_OP]], 3
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; CHECK-NEXT: [[B_OP2:%.*]] = mul nuw i8 [[B_OP]], 3
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[A_OP2]], [[B_OP2]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%A = add i8 %B, 1
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%A.op = shl nuw i8 %A, %shift
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%B.op = shl nuw i8 %B, %shift
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%A.op2 = mul nuw i8 %A.op, 3
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%B.op2 = mul nuw i8 %B.op, 3
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%cmp = icmp eq i8 %A.op2, %B.op2
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ret i1 %cmp
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}
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define i1 @shl_shl_nsw(i8 %B, i8 %shift) {
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; CHECK-LABEL: @shl_shl_nsw(
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; CHECK-NEXT: [[A:%.*]] = add i8 [[B:%.*]], 1
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; CHECK-NEXT: [[A_OP:%.*]] = shl nsw i8 [[A]], [[SHIFT:%.*]]
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; CHECK-NEXT: [[B_OP:%.*]] = shl nsw i8 [[B]], [[SHIFT]]
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; CHECK-NEXT: [[A_OP2:%.*]] = mul nuw i8 [[A_OP]], 3
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; CHECK-NEXT: [[B_OP2:%.*]] = mul nuw i8 [[B_OP]], 3
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[A_OP2]], [[B_OP2]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%A = add i8 %B, 1
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%A.op = shl nsw i8 %A, %shift
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%B.op = shl nsw i8 %B, %shift
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%A.op2 = mul nuw i8 %A.op, 3
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%B.op2 = mul nuw i8 %B.op, 3
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%cmp = icmp eq i8 %A.op2, %B.op2
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ret i1 %cmp
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}
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define i1 @shl_shl_may_wrap(i8 %B, i8 %shift) {
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; CHECK-LABEL: @shl_shl_may_wrap(
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; CHECK-NEXT: [[A:%.*]] = add i8 [[B:%.*]], 1
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; CHECK-NEXT: [[A_OP:%.*]] = shl i8 [[A]], [[SHIFT:%.*]]
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; CHECK-NEXT: [[B_OP:%.*]] = shl nsw i8 [[B]], [[SHIFT]]
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; CHECK-NEXT: [[A_OP2:%.*]] = mul nuw i8 [[A_OP]], 3
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; CHECK-NEXT: [[B_OP2:%.*]] = mul nuw i8 [[B_OP]], 3
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[A_OP2]], [[B_OP2]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%A = add i8 %B, 1
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%A.op = shl i8 %A, %shift
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%B.op = shl nsw i8 %B, %shift
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%A.op2 = mul nuw i8 %A.op, 3
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%B.op2 = mul nuw i8 %B.op, 3
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%cmp = icmp eq i8 %A.op2, %B.op2
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ret i1 %cmp
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}
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define i1 @shl_shl_mixed_wrap(i8 %B, i8 %shift) {
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; CHECK-LABEL: @shl_shl_mixed_wrap(
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; CHECK-NEXT: [[A:%.*]] = add i8 [[B:%.*]], 1
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; CHECK-NEXT: [[A_OP:%.*]] = shl nuw i8 [[A]], [[SHIFT:%.*]]
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; CHECK-NEXT: [[B_OP:%.*]] = shl nsw i8 [[B]], [[SHIFT]]
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; CHECK-NEXT: [[A_OP2:%.*]] = mul nuw i8 [[A_OP]], 3
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; CHECK-NEXT: [[B_OP2:%.*]] = mul nuw i8 [[B_OP]], 3
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[A_OP2]], [[B_OP2]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%A = add i8 %B, 1
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%A.op = shl nuw i8 %A, %shift
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%B.op = shl nsw i8 %B, %shift
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%A.op2 = mul nuw i8 %A.op, 3
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%B.op2 = mul nuw i8 %B.op, 3
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%cmp = icmp eq i8 %A.op2, %B.op2
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ret i1 %cmp
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}
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define i1 @shl_shl_may_be_equal(i8 %A, i8 %B, i8 %shift) {
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; CHECK-LABEL: @shl_shl_may_be_equal(
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; CHECK-NEXT: [[A_OP:%.*]] = shl nuw i8 [[A:%.*]], [[SHIFT:%.*]]
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; CHECK-NEXT: [[B_OP:%.*]] = shl nuw i8 [[B:%.*]], [[SHIFT]]
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; CHECK-NEXT: [[A_OP2:%.*]] = mul nuw i8 [[A_OP]], 3
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; CHECK-NEXT: [[B_OP2:%.*]] = mul nuw i8 [[B_OP]], 3
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[A_OP2]], [[B_OP2]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%A.op = shl nuw i8 %A, %shift
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%B.op = shl nuw i8 %B, %shift
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%A.op2 = mul nuw i8 %A.op, 3
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%B.op2 = mul nuw i8 %B.op, 3
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%cmp = icmp eq i8 %A.op2, %B.op2
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ret i1 %cmp
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}
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!0 = !{ i8 1, i8 5 }
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