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goldsteinngoldsteinn
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[ValueTracking] Add tests for computing knownbits from (icmp upred X (and/or X, Y)); NFC
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‎llvm/test/Transforms/InstCombine/known-bits.ll

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@@ -543,6 +543,206 @@ define i8 @and_eq_bits_must_be_set(i8 %x, i8 %y) {
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ret i8 %r
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}
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define i8 @test_icmp_or(i8 %n, i8 %n2, i8 %other) {
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; CHECK-LABEL: @test_icmp_or(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[N_OR:%.*]] = or i8 [[N:%.*]], [[N2:%.*]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i8 [[N_OR]], 32
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; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: [[R:%.*]] = and i8 [[N]], 32
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; CHECK-NEXT: ret i8 [[R]]
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; CHECK: if.else:
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; CHECK-NEXT: ret i8 [[OTHER:%.*]]
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;
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entry:
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%n_or = or i8 %n, %n2
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%cmp = icmp ult i8 %n_or, 32
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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%r = and i8 %n, 32
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ret i8 %r
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if.else:
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ret i8 %other
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}
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define i8 @test_icmp_or2(i8 %n, i8 %n2, i8 %other) {
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; CHECK-LABEL: @test_icmp_or2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[N_OR:%.*]] = or i8 [[N:%.*]], [[N2:%.*]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i8 [[N_OR]], 14
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; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: ret i8 [[OTHER:%.*]]
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; CHECK: if.else:
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; CHECK-NEXT: [[R:%.*]] = and i8 [[N]], 32
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; CHECK-NEXT: ret i8 [[R]]
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;
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entry:
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%n_or = or i8 %n, %n2
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%cmp = icmp uge i8 %n_or, 15
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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ret i8 %other
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if.else:
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%r = and i8 %n, 32
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ret i8 %r
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}
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define i8 @test_icmp_or_fail_bad_range(i8 %n, i8 %n2, i8 %other) {
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; CHECK-LABEL: @test_icmp_or_fail_bad_range(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[N_OR:%.*]] = or i8 [[N:%.*]], [[N2:%.*]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i8 [[N_OR]], 33
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; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: [[R:%.*]] = and i8 [[N]], 32
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; CHECK-NEXT: ret i8 [[R]]
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; CHECK: if.else:
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; CHECK-NEXT: ret i8 [[OTHER:%.*]]
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;
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entry:
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%n_or = or i8 %n, %n2
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%cmp = icmp ule i8 %n_or, 32
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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%r = and i8 %n, 32
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ret i8 %r
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if.else:
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ret i8 %other
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}
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define i8 @test_icmp_or_fail_bad_pred(i8 %n, i8 %n2, i8 %other) {
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; CHECK-LABEL: @test_icmp_or_fail_bad_pred(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[N_OR:%.*]] = or i8 [[N:%.*]], [[N2:%.*]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i8 [[N_OR]], 32
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; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: [[R:%.*]] = and i8 [[N]], 32
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; CHECK-NEXT: ret i8 [[R]]
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; CHECK: if.else:
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; CHECK-NEXT: ret i8 [[OTHER:%.*]]
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;
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entry:
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%n_or = or i8 %n, %n2
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%cmp = icmp ugt i8 %n_or, 32
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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%r = and i8 %n, 32
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ret i8 %r
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if.else:
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ret i8 %other
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}
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define i8 @test_icmp_and(i8 %n, i8 %n2, i8 %other) {
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; CHECK-LABEL: @test_icmp_and(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[N_AND:%.*]] = and i8 [[N:%.*]], [[N2:%.*]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i8 [[N_AND]], -33
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; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: [[R:%.*]] = and i8 [[N]], 32
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; CHECK-NEXT: ret i8 [[R]]
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; CHECK: if.else:
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; CHECK-NEXT: ret i8 [[OTHER:%.*]]
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;
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entry:
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%n_and = and i8 %n, %n2
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%cmp = icmp ugt i8 %n_and, 223
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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%r = and i8 %n, 32
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ret i8 %r
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if.else:
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ret i8 %other
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}
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define i8 @test_icmp_and2(i8 %n, i8 %n2, i8 %other) {
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; CHECK-LABEL: @test_icmp_and2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[N_AND:%.*]] = and i8 [[N:%.*]], [[N2:%.*]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i8 [[N_AND]], -31
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; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: ret i8 [[OTHER:%.*]]
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; CHECK: if.else:
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; CHECK-NEXT: [[R:%.*]] = and i8 [[N]], 32
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; CHECK-NEXT: ret i8 [[R]]
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;
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entry:
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%n_and = and i8 %n, %n2
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%cmp = icmp ule i8 %n_and, 224
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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ret i8 %other
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if.else:
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%r = and i8 %n, 32
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ret i8 %r
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}
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define i8 @test_icmp_and_fail_bad_range(i8 %n, i8 %n2, i8 %other) {
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; CHECK-LABEL: @test_icmp_and_fail_bad_range(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[N_AND:%.*]] = and i8 [[N:%.*]], [[N2:%.*]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i8 [[N_AND]], -34
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; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: [[R:%.*]] = and i8 [[N]], 32
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; CHECK-NEXT: ret i8 [[R]]
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; CHECK: if.else:
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; CHECK-NEXT: ret i8 [[OTHER:%.*]]
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;
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entry:
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%n_and = and i8 %n, %n2
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%cmp = icmp uge i8 %n_and, 223
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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%r = and i8 %n, 32
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ret i8 %r
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if.else:
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ret i8 %other
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}
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define i8 @test_icmp_and_fail_bad_pred(i8 %n, i8 %n2, i8 %other) {
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; CHECK-LABEL: @test_icmp_and_fail_bad_pred(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[N_AND:%.*]] = and i8 [[N:%.*]], [[N2:%.*]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i8 [[N_AND]], 31
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; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: [[R:%.*]] = and i8 [[N]], 32
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; CHECK-NEXT: ret i8 [[R]]
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; CHECK: if.else:
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; CHECK-NEXT: ret i8 [[OTHER:%.*]]
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;
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entry:
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%n_and = and i8 %n, %n2
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%cmp = icmp sge i8 %n_and, 32
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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%r = and i8 %n, 32
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ret i8 %r
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if.else:
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ret i8 %other
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}
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define i8 @and_eq_bits_must_be_set2(i8 %x, i8 %y) {
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; CHECK-LABEL: @and_eq_bits_must_be_set2(
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; CHECK-NEXT: [[XY:%.*]] = and i8 [[X:%.*]], [[Y:%.*]]

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