diff options
Diffstat (limited to 'src/cmd/compile/internal/gc/logic_test.go')
| -rw-r--r-- | src/cmd/compile/internal/gc/logic_test.go | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/gc/logic_test.go b/src/cmd/compile/internal/gc/logic_test.go new file mode 100644 index 0000000..78d2dd2 --- /dev/null +++ b/src/cmd/compile/internal/gc/logic_test.go @@ -0,0 +1,289 @@ +package gc + +import "testing" + +// Tests to make sure logic simplification rules are correct. + +func TestLogic64(t *testing.T) { + // test values to determine function equality + values := [...]int64{-1 << 63, 1<<63 - 1, -4, -3, -2, -1, 0, 1, 2, 3, 4} + + // golden functions we use repeatedly + zero := func(x int64) int64 { return 0 } + id := func(x int64) int64 { return x } + or := func(x, y int64) int64 { return x | y } + and := func(x, y int64) int64 { return x & y } + y := func(x, y int64) int64 { return y } + + for _, test := range [...]struct { + name string + f func(int64) int64 + golden func(int64) int64 + }{ + {"x|x", func(x int64) int64 { return x | x }, id}, + {"x|0", func(x int64) int64 { return x | 0 }, id}, + {"x|-1", func(x int64) int64 { return x | -1 }, func(x int64) int64 { return -1 }}, + {"x&x", func(x int64) int64 { return x & x }, id}, + {"x&0", func(x int64) int64 { return x & 0 }, zero}, + {"x&-1", func(x int64) int64 { return x & -1 }, id}, + {"x^x", func(x int64) int64 { return x ^ x }, zero}, + {"x^0", func(x int64) int64 { return x ^ 0 }, id}, + {"x^-1", func(x int64) int64 { return x ^ -1 }, func(x int64) int64 { return ^x }}, + {"x+0", func(x int64) int64 { return x + 0 }, id}, + {"x-x", func(x int64) int64 { return x - x }, zero}, + {"x*0", func(x int64) int64 { return x * 0 }, zero}, + {"^^x", func(x int64) int64 { return ^^x }, id}, + } { + for _, v := range values { + got := test.f(v) + want := test.golden(v) + if want != got { + t.Errorf("[%s](%d)=%d, want %d", test.name, v, got, want) + } + } + } + for _, test := range [...]struct { + name string + f func(int64, int64) int64 + golden func(int64, int64) int64 + }{ + {"x|(x|y)", func(x, y int64) int64 { return x | (x | y) }, or}, + {"x|(y|x)", func(x, y int64) int64 { return x | (y | x) }, or}, + {"(x|y)|x", func(x, y int64) int64 { return (x | y) | x }, or}, + {"(y|x)|x", func(x, y int64) int64 { return (y | x) | x }, or}, + {"x&(x&y)", func(x, y int64) int64 { return x & (x & y) }, and}, + {"x&(y&x)", func(x, y int64) int64 { return x & (y & x) }, and}, + {"(x&y)&x", func(x, y int64) int64 { return (x & y) & x }, and}, + {"(y&x)&x", func(x, y int64) int64 { return (y & x) & x }, and}, + {"x^(x^y)", func(x, y int64) int64 { return x ^ (x ^ y) }, y}, + {"x^(y^x)", func(x, y int64) int64 { return x ^ (y ^ x) }, y}, + {"(x^y)^x", func(x, y int64) int64 { return (x ^ y) ^ x }, y}, + {"(y^x)^x", func(x, y int64) int64 { return (y ^ x) ^ x }, y}, + {"-(y-x)", func(x, y int64) int64 { return -(y - x) }, func(x, y int64) int64 { return x - y }}, + {"(x+y)-x", func(x, y int64) int64 { return (x + y) - x }, y}, + {"(y+x)-x", func(x, y int64) int64 { return (y + x) - x }, y}, + } { + for _, v := range values { + for _, w := range values { + got := test.f(v, w) + want := test.golden(v, w) + if want != got { + t.Errorf("[%s](%d,%d)=%d, want %d", test.name, v, w, got, want) + } + } + } + } +} + +func TestLogic32(t *testing.T) { + // test values to determine function equality + values := [...]int32{-1 << 31, 1<<31 - 1, -4, -3, -2, -1, 0, 1, 2, 3, 4} + + // golden functions we use repeatedly + zero := func(x int32) int32 { return 0 } + id := func(x int32) int32 { return x } + or := func(x, y int32) int32 { return x | y } + and := func(x, y int32) int32 { return x & y } + y := func(x, y int32) int32 { return y } + + for _, test := range [...]struct { + name string + f func(int32) int32 + golden func(int32) int32 + }{ + {"x|x", func(x int32) int32 { return x | x }, id}, + {"x|0", func(x int32) int32 { return x | 0 }, id}, + {"x|-1", func(x int32) int32 { return x | -1 }, func(x int32) int32 { return -1 }}, + {"x&x", func(x int32) int32 { return x & x }, id}, + {"x&0", func(x int32) int32 { return x & 0 }, zero}, + {"x&-1", func(x int32) int32 { return x & -1 }, id}, + {"x^x", func(x int32) int32 { return x ^ x }, zero}, + {"x^0", func(x int32) int32 { return x ^ 0 }, id}, + {"x^-1", func(x int32) int32 { return x ^ -1 }, func(x int32) int32 { return ^x }}, + {"x+0", func(x int32) int32 { return x + 0 }, id}, + {"x-x", func(x int32) int32 { return x - x }, zero}, + {"x*0", func(x int32) int32 { return x * 0 }, zero}, + {"^^x", func(x int32) int32 { return ^^x }, id}, + } { + for _, v := range values { + got := test.f(v) + want := test.golden(v) + if want != got { + t.Errorf("[%s](%d)=%d, want %d", test.name, v, got, want) + } + } + } + for _, test := range [...]struct { + name string + f func(int32, int32) int32 + golden func(int32, int32) int32 + }{ + {"x|(x|y)", func(x, y int32) int32 { return x | (x | y) }, or}, + {"x|(y|x)", func(x, y int32) int32 { return x | (y | x) }, or}, + {"(x|y)|x", func(x, y int32) int32 { return (x | y) | x }, or}, + {"(y|x)|x", func(x, y int32) int32 { return (y | x) | x }, or}, + {"x&(x&y)", func(x, y int32) int32 { return x & (x & y) }, and}, + {"x&(y&x)", func(x, y int32) int32 { return x & (y & x) }, and}, + {"(x&y)&x", func(x, y int32) int32 { return (x & y) & x }, and}, + {"(y&x)&x", func(x, y int32) int32 { return (y & x) & x }, and}, + {"x^(x^y)", func(x, y int32) int32 { return x ^ (x ^ y) }, y}, + {"x^(y^x)", func(x, y int32) int32 { return x ^ (y ^ x) }, y}, + {"(x^y)^x", func(x, y int32) int32 { return (x ^ y) ^ x }, y}, + {"(y^x)^x", func(x, y int32) int32 { return (y ^ x) ^ x }, y}, + {"-(y-x)", func(x, y int32) int32 { return -(y - x) }, func(x, y int32) int32 { return x - y }}, + {"(x+y)-x", func(x, y int32) int32 { return (x + y) - x }, y}, + {"(y+x)-x", func(x, y int32) int32 { return (y + x) - x }, y}, + } { + for _, v := range values { + for _, w := range values { + got := test.f(v, w) + want := test.golden(v, w) + if want != got { + t.Errorf("[%s](%d,%d)=%d, want %d", test.name, v, w, got, want) + } + } + } + } +} + +func TestLogic16(t *testing.T) { + // test values to determine function equality + values := [...]int16{-1 << 15, 1<<15 - 1, -4, -3, -2, -1, 0, 1, 2, 3, 4} + + // golden functions we use repeatedly + zero := func(x int16) int16 { return 0 } + id := func(x int16) int16 { return x } + or := func(x, y int16) int16 { return x | y } + and := func(x, y int16) int16 { return x & y } + y := func(x, y int16) int16 { return y } + + for _, test := range [...]struct { + name string + f func(int16) int16 + golden func(int16) int16 + }{ + {"x|x", func(x int16) int16 { return x | x }, id}, + {"x|0", func(x int16) int16 { return x | 0 }, id}, + {"x|-1", func(x int16) int16 { return x | -1 }, func(x int16) int16 { return -1 }}, + {"x&x", func(x int16) int16 { return x & x }, id}, + {"x&0", func(x int16) int16 { return x & 0 }, zero}, + {"x&-1", func(x int16) int16 { return x & -1 }, id}, + {"x^x", func(x int16) int16 { return x ^ x }, zero}, + {"x^0", func(x int16) int16 { return x ^ 0 }, id}, + {"x^-1", func(x int16) int16 { return x ^ -1 }, func(x int16) int16 { return ^x }}, + {"x+0", func(x int16) int16 { return x + 0 }, id}, + {"x-x", func(x int16) int16 { return x - x }, zero}, + {"x*0", func(x int16) int16 { return x * 0 }, zero}, + {"^^x", func(x int16) int16 { return ^^x }, id}, + } { + for _, v := range values { + got := test.f(v) + want := test.golden(v) + if want != got { + t.Errorf("[%s](%d)=%d, want %d", test.name, v, got, want) + } + } + } + for _, test := range [...]struct { + name string + f func(int16, int16) int16 + golden func(int16, int16) int16 + }{ + {"x|(x|y)", func(x, y int16) int16 { return x | (x | y) }, or}, + {"x|(y|x)", func(x, y int16) int16 { return x | (y | x) }, or}, + {"(x|y)|x", func(x, y int16) int16 { return (x | y) | x }, or}, + {"(y|x)|x", func(x, y int16) int16 { return (y | x) | x }, or}, + {"x&(x&y)", func(x, y int16) int16 { return x & (x & y) }, and}, + {"x&(y&x)", func(x, y int16) int16 { return x & (y & x) }, and}, + {"(x&y)&x", func(x, y int16) int16 { return (x & y) & x }, and}, + {"(y&x)&x", func(x, y int16) int16 { return (y & x) & x }, and}, + {"x^(x^y)", func(x, y int16) int16 { return x ^ (x ^ y) }, y}, + {"x^(y^x)", func(x, y int16) int16 { return x ^ (y ^ x) }, y}, + {"(x^y)^x", func(x, y int16) int16 { return (x ^ y) ^ x }, y}, + {"(y^x)^x", func(x, y int16) int16 { return (y ^ x) ^ x }, y}, + {"-(y-x)", func(x, y int16) int16 { return -(y - x) }, func(x, y int16) int16 { return x - y }}, + {"(x+y)-x", func(x, y int16) int16 { return (x + y) - x }, y}, + {"(y+x)-x", func(x, y int16) int16 { return (y + x) - x }, y}, + } { + for _, v := range values { + for _, w := range values { + got := test.f(v, w) + want := test.golden(v, w) + if want != got { + t.Errorf("[%s](%d,%d)=%d, want %d", test.name, v, w, got, want) + } + } + } + } +} + +func TestLogic8(t *testing.T) { + // test values to determine function equality + values := [...]int8{-1 << 7, 1<<7 - 1, -4, -3, -2, -1, 0, 1, 2, 3, 4} + + // golden functions we use repeatedly + zero := func(x int8) int8 { return 0 } + id := func(x int8) int8 { return x } + or := func(x, y int8) int8 { return x | y } + and := func(x, y int8) int8 { return x & y } + y := func(x, y int8) int8 { return y } + + for _, test := range [...]struct { + name string + f func(int8) int8 + golden func(int8) int8 + }{ + {"x|x", func(x int8) int8 { return x | x }, id}, + {"x|0", func(x int8) int8 { return x | 0 }, id}, + {"x|-1", func(x int8) int8 { return x | -1 }, func(x int8) int8 { return -1 }}, + {"x&x", func(x int8) int8 { return x & x }, id}, + {"x&0", func(x int8) int8 { return x & 0 }, zero}, + {"x&-1", func(x int8) int8 { return x & -1 }, id}, + {"x^x", func(x int8) int8 { return x ^ x }, zero}, + {"x^0", func(x int8) int8 { return x ^ 0 }, id}, + {"x^-1", func(x int8) int8 { return x ^ -1 }, func(x int8) int8 { return ^x }}, + {"x+0", func(x int8) int8 { return x + 0 }, id}, + {"x-x", func(x int8) int8 { return x - x }, zero}, + {"x*0", func(x int8) int8 { return x * 0 }, zero}, + {"^^x", func(x int8) int8 { return ^^x }, id}, + } { + for _, v := range values { + got := test.f(v) + want := test.golden(v) + if want != got { + t.Errorf("[%s](%d)=%d, want %d", test.name, v, got, want) + } + } + } + for _, test := range [...]struct { + name string + f func(int8, int8) int8 + golden func(int8, int8) int8 + }{ + {"x|(x|y)", func(x, y int8) int8 { return x | (x | y) }, or}, + {"x|(y|x)", func(x, y int8) int8 { return x | (y | x) }, or}, + {"(x|y)|x", func(x, y int8) int8 { return (x | y) | x }, or}, + {"(y|x)|x", func(x, y int8) int8 { return (y | x) | x }, or}, + {"x&(x&y)", func(x, y int8) int8 { return x & (x & y) }, and}, + {"x&(y&x)", func(x, y int8) int8 { return x & (y & x) }, and}, + {"(x&y)&x", func(x, y int8) int8 { return (x & y) & x }, and}, + {"(y&x)&x", func(x, y int8) int8 { return (y & x) & x }, and}, + {"x^(x^y)", func(x, y int8) int8 { return x ^ (x ^ y) }, y}, + {"x^(y^x)", func(x, y int8) int8 { return x ^ (y ^ x) }, y}, + {"(x^y)^x", func(x, y int8) int8 { return (x ^ y) ^ x }, y}, + {"(y^x)^x", func(x, y int8) int8 { return (y ^ x) ^ x }, y}, + {"-(y-x)", func(x, y int8) int8 { return -(y - x) }, func(x, y int8) int8 { return x - y }}, + {"(x+y)-x", func(x, y int8) int8 { return (x + y) - x }, y}, + {"(y+x)-x", func(x, y int8) int8 { return (y + x) - x }, y}, + } { + for _, v := range values { + for _, w := range values { + got := test.f(v, w) + want := test.golden(v, w) + if want != got { + t.Errorf("[%s](%d,%d)=%d, want %d", test.name, v, w, got, want) + } + } + } + } +} |