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Diffstat (limited to 'test/Transforms/InstCombine/and.ll')
-rw-r--r-- | test/Transforms/InstCombine/and.ll | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/and.ll b/test/Transforms/InstCombine/and.ll new file mode 100644 index 0000000..7b08975 --- /dev/null +++ b/test/Transforms/InstCombine/and.ll @@ -0,0 +1,229 @@ +; This test makes sure that these instructions are properly eliminated. +; + +; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine | llvm-dis | not grep and +; END. + +implementation + +int %test1(int %A) { + %B = and int %A, 0 ; zero result + ret int %B +} + +int %test2(int %A) { + %B = and int %A, -1 ; noop + ret int %B +} + +bool %test3(bool %A) { + %B = and bool %A, false ; always = false + ret bool %B +} + +bool %test4(bool %A) { + %B = and bool %A, true ; noop + ret bool %B +} + +int %test5(int %A) { + %B = and int %A, %A + ret int %B +} + +bool %test6(bool %A) { + %B = and bool %A, %A + ret bool %B +} + +int %test7(int %A) { ; A & ~A == 0 + %NotA = xor int %A, -1 + %B = and int %A, %NotA + ret int %B +} + +ubyte %test8(ubyte %A) { ; AND associates + %B = and ubyte %A, 3 + %C = and ubyte %B, 4 + ret ubyte %C +} + +bool %test9(int %A) { + %B = and int %A, -2147483648 ; Test of sign bit, convert to setle %A, 0 + %C = setne int %B, 0 + ret bool %C +} + +bool %test9(uint %A) { + %B = and uint %A, 2147483648 ; Test of sign bit, convert to setle %A, 0 + %C = setne uint %B, 0 + ret bool %C +} + +uint %test10(uint %A) { + %B = and uint %A, 12 + %C = xor uint %B, 15 + %D = and uint %C, 1 ; (X ^ C1) & C2 --> (X & C2) ^ (C1&C2) + ret uint %D +} + +uint %test11(uint %A, uint* %P) { + %B = or uint %A, 3 + %C = xor uint %B, 12 + store uint %C, uint* %P ; additional use of C + %D = and uint %C, 3 ; %C = and uint %B, 3 --> 3 + ret uint %D +} + +bool %test12(uint %A, uint %B) { + %C1 = setlt uint %A, %B + %C2 = setle uint %A, %B + %D = and bool %C1, %C2 ; (A < B) & (A <= B) === (A < B) + ret bool %D +} + +bool %test13(uint %A, uint %B) { + %C1 = setlt uint %A, %B + %C2 = setgt uint %A, %B + %D = and bool %C1, %C2 ; (A < B) & (A > B) === false + ret bool %D +} + +bool %test14(ubyte %A) { + %B = and ubyte %A, 128 + %C = setne ubyte %B, 0 + ret bool %C +} + +ubyte %test15(ubyte %A) { + %B = shr ubyte %A, ubyte 7 + %C = and ubyte %B, 2 ; Always equals zero + ret ubyte %C +} + +ubyte %test16(ubyte %A) { + %B = shl ubyte %A, ubyte 2 + %C = and ubyte %B, 3 + ret ubyte %C +} + +sbyte %test17(sbyte %X, sbyte %Y) { ;; ~(~X & Y) --> (X | ~Y) + %B = xor sbyte %X, -1 + %C = and sbyte %B, %Y + %D = xor sbyte %C, -1 + ret sbyte %D +} + +bool %test18(int %A) { + %B = and int %A, -128 + %C = setne int %B, 0 ;; C >= 128 + ret bool %C +} + +bool %test18a(ubyte %A) { + %B = and ubyte %A, 254 + %C = seteq ubyte %B, 0 + ret bool %C +} + +int %test19(int %A) { + %B = shl int %A, ubyte 3 + %C = and int %B, -2 ;; Clearing a zero bit + ret int %C +} + +ubyte %test20(ubyte %A) { + %C = shr ubyte %A, ubyte 7 + %D = and ubyte %C, 1 ;; Unneeded + ret ubyte %D +} + +bool %test22(int %A) { + %B = seteq int %A, 1 + %C = setge int %A, 3 + %D = and bool %B, %C ;; False + ret bool %D +} + +bool %test23(int %A) { + %B = setgt int %A, 1 + %C = setle int %A, 2 + %D = and bool %B, %C ;; A == 2 + ret bool %D +} + +bool %test24(int %A) { + %B = setgt int %A, 1 + %C = setne int %A, 2 + %D = and bool %B, %C ;; A > 2 + ret bool %D +} + +bool %test25(int %A) { + %B = setge int %A, 50 + %C = setlt int %A, 100 + %D = and bool %B, %C ;; (A-50) <u 50 + ret bool %D +} + +bool %test26(int %A) { + %B = setne int %A, 50 + %C = setne int %A, 51 + %D = and bool %B, %C ;; (A-50) > 1 + ret bool %D +} + +ubyte %test27(ubyte %A) { + %B = and ubyte %A, 4 + %C = sub ubyte %B, 16 + %D = and ubyte %C, 240 ;; 0xF0 + %E = add ubyte %D, 16 + ret ubyte %E +} + +int %test28(int %X) { ;; This is juse a zero extending shr. + %Y = shr int %X, ubyte 24 ;; Sign extend + %Z = and int %Y, 255 ;; Mask out sign bits + ret int %Z +} + +int %test29(ubyte %X) { + %Y = cast ubyte %X to int + %Z = and int %Y, 255 ;; Zero extend makes this unneeded. + ret int %Z +} + +int %test30(bool %X) { + %Y = cast bool %X to int + %Z = and int %Y, 1 + ret int %Z +} + +uint %test31(bool %X) { + %Y = cast bool %X to uint + %Z = shl uint %Y, ubyte 4 + %A = and uint %Z, 16 + ret uint %A +} + +uint %test32(uint %In) { + %Y = and uint %In, 16 + %Z = shr uint %Y, ubyte 2 + %A = and uint %Z, 1 + ret uint %A +} + +uint %test33(uint %b) { ;; Code corresponding to one-bit bitfield ^1. + %tmp.4.mask = and uint %b, 1 + %tmp.10 = xor uint %tmp.4.mask, 1 + %tmp.12 = and uint %b, 4294967294 + %tmp.13 = or uint %tmp.12, %tmp.10 + ret uint %tmp.13 +} + +int %test34(int %A, int %B) { + %tmp.2 = or int %B, %A + %tmp.4 = and int %tmp.2, %B + ret int %tmp.4 +} + |