1 ; This test makes sure that add instructions are properly eliminated. 2 ; This test is for Integer BitWidth > 64 && BitWidth <= 1024. 3 4 ; RUN: opt < %s -instcombine -S | \ 5 ; RUN: grep -v OK | not grep add 6 ; END. 7 8 define i111 @test1(i111 %x) { 9 %tmp.2 = shl i111 1, 110 10 %tmp.4 = xor i111 %x, %tmp.2 11 ;; Add of sign bit -> xor of sign bit. 12 %tmp.6 = add i111 %tmp.4, %tmp.2 13 ret i111 %tmp.6 14 } 15 16 define i65 @test2(i65 %x) { 17 %tmp.0 = shl i65 1, 64 18 %tmp.2 = xor i65 %x, %tmp.0 19 ;; Add of sign bit -> xor of sign bit. 20 %tmp.4 = add i65 %tmp.2, %tmp.0 21 ret i65 %tmp.4 22 } 23 24 define i1024 @test3(i1024 %x) { 25 %tmp.0 = shl i1024 1, 1023 26 %tmp.2 = xor i1024 %x, %tmp.0 27 ;; Add of sign bit -> xor of sign bit. 28 %tmp.4 = add i1024 %tmp.2, %tmp.0 29 ret i1024 %tmp.4 30 } 31 32 define i128 @test4(i128 %x) { 33 ;; If we have ADD(XOR(AND(X, 0xFF), 0xF..F80), 0x80), it's a sext. 34 %tmp.5 = shl i128 1, 127 35 %tmp.1 = ashr i128 %tmp.5, 120 36 %tmp.2 = xor i128 %x, %tmp.1 37 %tmp.4 = add i128 %tmp.2, %tmp.5 38 ret i128 %tmp.4 39 } 40 41 define i77 @test6(i77 %x) { 42 ;; (x & 254)+1 -> (x & 254)|1 43 %tmp.2 = and i77 %x, 562949953421310 44 %tmp.4 = add i77 %tmp.2, 1 45 ret i77 %tmp.4 46 } 47
