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author | Noah Goldstein <goldstein.w.n@gmail.com> | 2024-03-28 14:23:58 -0500 |
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committer | Noah Goldstein <goldstein.w.n@gmail.com> | 2024-04-04 12:42:58 -0500 |
commit | 02b49d14a50cbfad0196cdddba6771f0593fdc3b (patch) | |
tree | 563f72c72d75c1daff0e429bb3a23f9f6db7ead6 /llvm | |
parent | 220cdf940e953002df1521bbd061d8e0b4ffed5c (diff) | |
download | llvm-02b49d14a50cbfad0196cdddba6771f0593fdc3b.zip llvm-02b49d14a50cbfad0196cdddba6771f0593fdc3b.tar.gz llvm-02b49d14a50cbfad0196cdddba6771f0593fdc3b.tar.bz2 |
[ValueTracking] Add tests for computing known bits from `(icmp eq (and/or x,y), C)`; NFC
Diffstat (limited to 'llvm')
-rw-r--r-- | llvm/test/Transforms/InstCombine/known-bits.ll | 110 |
1 files changed, 105 insertions, 5 deletions
diff --git a/llvm/test/Transforms/InstCombine/known-bits.ll b/llvm/test/Transforms/InstCombine/known-bits.ll index 5305c78..af3db82 100644 --- a/llvm/test/Transforms/InstCombine/known-bits.ll +++ b/llvm/test/Transforms/InstCombine/known-bits.ll @@ -124,7 +124,6 @@ exit: ret i8 %or2 } - define i8 @test_cond_and_bothways(i8 %x) { ; CHECK-LABEL: @test_cond_and_bothways( ; CHECK-NEXT: [[AND:%.*]] = and i8 [[X:%.*]], 91 @@ -181,8 +180,6 @@ exit: ret i8 %or2 } - - define i8 @test_cond_and_commuted(i8 %x, i1 %c1, i1 %c2) { ; CHECK-LABEL: @test_cond_and_commuted( ; CHECK-NEXT: [[AND:%.*]] = and i8 [[X:%.*]], 3 @@ -343,7 +340,7 @@ exit: ret i8 %or2 } -define i32 @test_icmp_trunc1(i32 %x){ +define i32 @test_icmp_trunc1(i32 %x) { ; CHECK-LABEL: @test_icmp_trunc1( ; CHECK-NEXT: entry: ; CHECK-NEXT: [[Y:%.*]] = trunc i32 [[X:%.*]] to i16 @@ -365,7 +362,7 @@ else: ret i32 0 } -define i32 @test_icmp_trunc_assume(i32 %x){ +define i32 @test_icmp_trunc_assume(i32 %x) { ; CHECK-LABEL: @test_icmp_trunc_assume( ; CHECK-NEXT: entry: ; CHECK-NEXT: [[Y:%.*]] = trunc i32 [[X:%.*]] to i16 @@ -532,7 +529,110 @@ if.else: ret i1 %other } +define i8 @and_eq_bits_must_be_set(i8 %x, i8 %y) { +; CHECK-LABEL: @and_eq_bits_must_be_set( +; CHECK-NEXT: [[XY:%.*]] = and i8 [[X:%.*]], [[Y:%.*]] +; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[XY]], 123 +; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]]) +; CHECK-NEXT: [[R:%.*]] = and i8 [[X]], 1 +; CHECK-NEXT: ret i8 [[R]] +; + %xy = and i8 %x, %y + %cmp = icmp eq i8 %xy, 123 + call void @llvm.assume(i1 %cmp) + %r = and i8 %x, 1 + ret i8 %r +} + +define i8 @and_eq_bits_must_be_set2(i8 %x, i8 %y) { +; CHECK-LABEL: @and_eq_bits_must_be_set2( +; CHECK-NEXT: [[XY:%.*]] = and i8 [[X:%.*]], [[Y:%.*]] +; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[XY]], 123 +; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]]) +; CHECK-NEXT: [[R:%.*]] = and i8 [[Y]], 11 +; CHECK-NEXT: ret i8 [[R]] +; + %xy = and i8 %x, %y + %cmp = icmp eq i8 %xy, 123 + call void @llvm.assume(i1 %cmp) + %r = and i8 %y, 11 + ret i8 %r +} + +define i8 @and_eq_bits_must_be_set2_partial_fail(i8 %x, i8 %y) { +; CHECK-LABEL: @and_eq_bits_must_be_set2_partial_fail( +; CHECK-NEXT: [[XY:%.*]] = and i8 [[X:%.*]], [[Y:%.*]] +; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[XY]], 123 +; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]]) +; CHECK-NEXT: [[R:%.*]] = and i8 [[Y]], 111 +; CHECK-NEXT: ret i8 [[R]] +; + %xy = and i8 %x, %y + %cmp = icmp eq i8 %xy, 123 + call void @llvm.assume(i1 %cmp) + %r = and i8 %y, 111 + ret i8 %r +} + +define i8 @or_eq_bits_must_be_unset(i8 %x, i8 %y) { +; CHECK-LABEL: @or_eq_bits_must_be_unset( +; CHECK-NEXT: [[XY:%.*]] = or i8 [[X:%.*]], [[Y:%.*]] +; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[XY]], 124 +; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]]) +; CHECK-NEXT: [[R:%.*]] = and i8 [[X]], 3 +; CHECK-NEXT: ret i8 [[R]] +; + %xy = or i8 %x, %y + %cmp = icmp eq i8 %xy, 124 + call void @llvm.assume(i1 %cmp) + %r = and i8 %x, 3 + ret i8 %r +} + +define i8 @or_eq_bits_must_be_unset2(i8 %x, i8 %y) { +; CHECK-LABEL: @or_eq_bits_must_be_unset2( +; CHECK-NEXT: [[XY:%.*]] = or i8 [[X:%.*]], [[Y:%.*]] +; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[XY]], 124 +; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]]) +; CHECK-NEXT: [[R:%.*]] = and i8 [[Y]], 1 +; CHECK-NEXT: ret i8 [[R]] +; + %xy = or i8 %x, %y + %cmp = icmp eq i8 %xy, 124 + call void @llvm.assume(i1 %cmp) + %r = and i8 %y, 1 + ret i8 %r +} +define i8 @or_eq_bits_must_be_unset2_partial_fail(i8 %x, i8 %y) { +; CHECK-LABEL: @or_eq_bits_must_be_unset2_partial_fail( +; CHECK-NEXT: [[XY:%.*]] = or i8 [[X:%.*]], [[Y:%.*]] +; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[XY]], 124 +; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]]) +; CHECK-NEXT: [[R:%.*]] = and i8 [[Y]], 7 +; CHECK-NEXT: ret i8 [[R]] +; + %xy = or i8 %x, %y + %cmp = icmp eq i8 %xy, 124 + call void @llvm.assume(i1 %cmp) + %r = and i8 %y, 7 + ret i8 %r +} + +define i8 @or_ne_bits_must_be_unset2_fail(i8 %x, i8 %y) { +; CHECK-LABEL: @or_ne_bits_must_be_unset2_fail( +; CHECK-NEXT: [[XY:%.*]] = or i8 [[X:%.*]], [[Y:%.*]] +; CHECK-NEXT: [[CMP:%.*]] = icmp ne i8 [[XY]], 124 +; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]]) +; CHECK-NEXT: [[R:%.*]] = and i8 [[X]], 3 +; CHECK-NEXT: ret i8 [[R]] +; + %xy = or i8 %x, %y + %cmp = icmp ne i8 %xy, 124 + call void @llvm.assume(i1 %cmp) + %r = and i8 %x, 3 + ret i8 %r +} declare void @use(i1) declare void @sink(i8) |