; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt < %s -instcombine -S | FileCheck %s ; If we have a masked merge, in the form of: (M is not constant) ; ((x ^ y) & ~M) ^ y ; We can de-invert the M: ; ((x ^ y) & M) ^ x define <2 x i4> @vector (<2 x i4> %x, <2 x i4> %y, <2 x i4> %m) { ; CHECK-LABEL: @vector( ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[X:%.*]], [[Y:%.*]] ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i4> [[N0]], [[M:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[TMP1]], [[X]] ; CHECK-NEXT: ret <2 x i4> [[R]] ; %im = xor <2 x i4> %m, %n0 = xor <2 x i4> %x, %y %n1 = and <2 x i4> %n0, %im %r = xor <2 x i4> %n1, %y ret <2 x i4> %r } define <3 x i4> @vector_undef (<3 x i4> %x, <3 x i4> %y, <3 x i4> %m) { ; CHECK-LABEL: @vector_undef( ; CHECK-NEXT: [[N0:%.*]] = xor <3 x i4> [[X:%.*]], [[Y:%.*]] ; CHECK-NEXT: [[TMP1:%.*]] = and <3 x i4> [[N0]], [[M:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <3 x i4> [[TMP1]], [[X]] ; CHECK-NEXT: ret <3 x i4> [[R]] ; %im = xor <3 x i4> %m, %n0 = xor <3 x i4> %x, %y %n1 = and <3 x i4> %n0, %im %r = xor <3 x i4> %n1, %y ret <3 x i4> %r } ; ============================================================================ ; ; Various cases with %x and/or %y being a constant ; ============================================================================ ; define <2 x i4> @in_constant_varx_mone_invmask(<2 x i4> %x, <2 x i4> %mask) { ; CHECK-LABEL: @in_constant_varx_mone_invmask( ; CHECK-NEXT: [[N1_DEMORGAN:%.*]] = or <2 x i4> [[X:%.*]], [[MASK:%.*]] ; CHECK-NEXT: ret <2 x i4> [[N1_DEMORGAN]] ; %notmask = xor <2 x i4> %mask, %n0 = xor <2 x i4> %x, ; %x %n1 = and <2 x i4> %n0, %notmask %r = xor <2 x i4> %n1, ret <2 x i4> %r } define <2 x i4> @in_constant_varx_6_invmask(<2 x i4> %x, <2 x i4> %mask) { ; CHECK-LABEL: @in_constant_varx_6_invmask( ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[X:%.*]], ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i4> [[N0]], [[MASK:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[TMP1]], [[X]] ; CHECK-NEXT: ret <2 x i4> [[R]] ; %notmask = xor <2 x i4> %mask, %n0 = xor <2 x i4> %x, ; %x %n1 = and <2 x i4> %n0, %notmask %r = xor <2 x i4> %n1, ret <2 x i4> %r } define <2 x i4> @in_constant_varx_6_invmask_nonsplat(<2 x i4> %x, <2 x i4> %mask) { ; CHECK-LABEL: @in_constant_varx_6_invmask_nonsplat( ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[X:%.*]], ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i4> [[N0]], [[MASK:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[TMP1]], [[X]] ; CHECK-NEXT: ret <2 x i4> [[R]] ; %notmask = xor <2 x i4> %mask, %n0 = xor <2 x i4> %x, ; %x %n1 = and <2 x i4> %n0, %notmask %r = xor <2 x i4> %n1, ret <2 x i4> %r } define <3 x i4> @in_constant_varx_6_invmask_undef(<3 x i4> %x, <3 x i4> %mask) { ; CHECK-LABEL: @in_constant_varx_6_invmask_undef( ; CHECK-NEXT: [[N0:%.*]] = xor <3 x i4> [[X:%.*]], ; CHECK-NEXT: [[TMP1:%.*]] = and <3 x i4> [[N0]], [[MASK:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <3 x i4> [[TMP1]], [[X]] ; CHECK-NEXT: ret <3 x i4> [[R]] ; %notmask = xor <3 x i4> %mask, %n0 = xor <3 x i4> %x, ; %x %n1 = and <3 x i4> %n0, %notmask %r = xor <3 x i4> %n1, ret <3 x i4> %r } define <2 x i4> @in_constant_mone_vary_invmask(<2 x i4> %y, <2 x i4> %mask) { ; CHECK-LABEL: @in_constant_mone_vary_invmask( ; CHECK-NEXT: [[MASK_NOT:%.*]] = xor <2 x i4> [[MASK:%.*]], ; CHECK-NEXT: [[R:%.*]] = or <2 x i4> [[MASK_NOT]], [[Y:%.*]] ; CHECK-NEXT: ret <2 x i4> [[R]] ; %notmask = xor <2 x i4> %mask, %n0 = xor <2 x i4> , %y ; %x %n1 = and <2 x i4> %n0, %notmask %r = xor <2 x i4> %n1, %y ret <2 x i4> %r } define <2 x i4> @in_constant_6_vary_invmask(<2 x i4> %y, <2 x i4> %mask) { ; CHECK-LABEL: @in_constant_6_vary_invmask( ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[Y:%.*]], ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i4> [[N0]], [[MASK:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[TMP1]], ; CHECK-NEXT: ret <2 x i4> [[R]] ; %notmask = xor <2 x i4> %mask, %n0 = xor <2 x i4> %y, ; %x %n1 = and <2 x i4> %n0, %notmask %r = xor <2 x i4> %n1, %y ret <2 x i4> %r } define <2 x i4> @in_constant_6_vary_invmask_nonsplat(<2 x i4> %y, <2 x i4> %mask) { ; CHECK-LABEL: @in_constant_6_vary_invmask_nonsplat( ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[Y:%.*]], ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i4> [[N0]], [[MASK:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[TMP1]], ; CHECK-NEXT: ret <2 x i4> [[R]] ; %notmask = xor <2 x i4> %mask, %n0 = xor <2 x i4> %y, ; %x %n1 = and <2 x i4> %n0, %notmask %r = xor <2 x i4> %n1, %y ret <2 x i4> %r } define <3 x i4> @in_constant_6_vary_invmask_undef(<3 x i4> %y, <3 x i4> %mask) { ; CHECK-LABEL: @in_constant_6_vary_invmask_undef( ; CHECK-NEXT: [[N0:%.*]] = xor <3 x i4> [[Y:%.*]], ; CHECK-NEXT: [[TMP1:%.*]] = and <3 x i4> [[N0]], [[MASK:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <3 x i4> [[TMP1]], ; CHECK-NEXT: ret <3 x i4> [[R]] ; %notmask = xor <3 x i4> %mask, %n0 = xor <3 x i4> %y, ; %x %n1 = and <3 x i4> %n0, %notmask %r = xor <3 x i4> %n1, %y ret <3 x i4> %r } ; ============================================================================ ; ; Commutativity ; ============================================================================ ; ; Used to make sure that the IR complexity sorting does not interfere. declare <2 x i4> @gen4() ; FIXME: should %n1 = and <2 x i4> %im, %n0 swapped order pattern be tested? define <2 x i4> @c_1_0_0 (<2 x i4> %x, <2 x i4> %y, <2 x i4> %m) { ; CHECK-LABEL: @c_1_0_0( ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[Y:%.*]], [[X:%.*]] ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i4> [[N0]], [[M:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[TMP1]], [[X]] ; CHECK-NEXT: ret <2 x i4> [[R]] ; %im = xor <2 x i4> %m, %n0 = xor <2 x i4> %y, %x ; swapped order %n1 = and <2 x i4> %n0, %im %r = xor <2 x i4> %n1, %y ret <2 x i4> %r } define <2 x i4> @c_0_1_0 (<2 x i4> %x, <2 x i4> %y, <2 x i4> %m) { ; CHECK-LABEL: @c_0_1_0( ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[X:%.*]], [[Y:%.*]] ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i4> [[N0]], [[M:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[TMP1]], [[Y]] ; CHECK-NEXT: ret <2 x i4> [[R]] ; %im = xor <2 x i4> %m, %n0 = xor <2 x i4> %x, %y %n1 = and <2 x i4> %n0, %im %r = xor <2 x i4> %n1, %x ; %x instead of %y ret <2 x i4> %r } define <2 x i4> @c_0_0_1 (<2 x i4> %m) { ; CHECK-LABEL: @c_0_0_1( ; CHECK-NEXT: [[X:%.*]] = call <2 x i4> @gen4() ; CHECK-NEXT: [[Y:%.*]] = call <2 x i4> @gen4() ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[X]], [[Y]] ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i4> [[N0]], [[M:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[TMP1]], [[X]] ; CHECK-NEXT: ret <2 x i4> [[R]] ; %im = xor <2 x i4> %m, %x = call <2 x i4> @gen4() %y = call <2 x i4> @gen4() %n0 = xor <2 x i4> %x, %y %n1 = and <2 x i4> %n0, %im %r = xor <2 x i4> %y, %n1 ; swapped order ret <2 x i4> %r } define <2 x i4> @c_1_1_0 (<2 x i4> %x, <2 x i4> %y, <2 x i4> %m) { ; CHECK-LABEL: @c_1_1_0( ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[Y:%.*]], [[X:%.*]] ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i4> [[N0]], [[M:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[TMP1]], [[Y]] ; CHECK-NEXT: ret <2 x i4> [[R]] ; %im = xor <2 x i4> %m, %n0 = xor <2 x i4> %y, %x ; swapped order %n1 = and <2 x i4> %n0, %im %r = xor <2 x i4> %n1, %x ; %x instead of %y ret <2 x i4> %r } define <2 x i4> @c_1_0_1 (<2 x i4> %x, <2 x i4> %m) { ; CHECK-LABEL: @c_1_0_1( ; CHECK-NEXT: [[Y:%.*]] = call <2 x i4> @gen4() ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[Y]], [[X:%.*]] ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i4> [[N0]], [[M:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[TMP1]], [[X]] ; CHECK-NEXT: ret <2 x i4> [[R]] ; %im = xor <2 x i4> %m, %y = call <2 x i4> @gen4() %n0 = xor <2 x i4> %y, %x ; swapped order %n1 = and <2 x i4> %n0, %im %r = xor <2 x i4> %y, %n1 ; swapped order ret <2 x i4> %r } define <2 x i4> @c_0_1_1 (<2 x i4> %y, <2 x i4> %m) { ; CHECK-LABEL: @c_0_1_1( ; CHECK-NEXT: [[X:%.*]] = call <2 x i4> @gen4() ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[X]], [[Y:%.*]] ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i4> [[N0]], [[M:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[TMP1]], [[Y]] ; CHECK-NEXT: ret <2 x i4> [[R]] ; %im = xor <2 x i4> %m, %x = call <2 x i4> @gen4() %n0 = xor <2 x i4> %x, %y %n1 = and <2 x i4> %n0, %im %r = xor <2 x i4> %x, %n1 ; swapped order, %x instead of %y ret <2 x i4> %r } define <2 x i4> @c_1_1_1 (<2 x i4> %m) { ; CHECK-LABEL: @c_1_1_1( ; CHECK-NEXT: [[X:%.*]] = call <2 x i4> @gen4() ; CHECK-NEXT: [[Y:%.*]] = call <2 x i4> @gen4() ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[Y]], [[X]] ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i4> [[N0]], [[M:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[TMP1]], [[Y]] ; CHECK-NEXT: ret <2 x i4> [[R]] ; %im = xor <2 x i4> %m, %x = call <2 x i4> @gen4() %y = call <2 x i4> @gen4() %n0 = xor <2 x i4> %y, %x ; swapped order %n1 = and <2 x i4> %n0, %im %r = xor <2 x i4> %x, %n1 ; swapped order, %x instead of %y ret <2 x i4> %r } define <2 x i4> @commutativity_constant_varx_6_invmask(<2 x i4> %x, <2 x i4> %mask) { ; CHECK-LABEL: @commutativity_constant_varx_6_invmask( ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[X:%.*]], ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i4> [[N0]], [[MASK:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[TMP1]], [[X]] ; CHECK-NEXT: ret <2 x i4> [[R]] ; %notmask = xor <2 x i4> %mask, %n0 = xor <2 x i4> %x, ; %x %n1 = and <2 x i4> %notmask, %n0 ; swapped %r = xor <2 x i4> %n1, ret <2 x i4> %r } define <2 x i4> @commutativity_constant_6_vary_invmask(<2 x i4> %y, <2 x i4> %mask) { ; CHECK-LABEL: @commutativity_constant_6_vary_invmask( ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[Y:%.*]], ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i4> [[N0]], [[MASK:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[TMP1]], ; CHECK-NEXT: ret <2 x i4> [[R]] ; %notmask = xor <2 x i4> %mask, %n0 = xor <2 x i4> %y, ; %x %n1 = and <2 x i4> %notmask, %n0 ; swapped %r = xor <2 x i4> %n1, %y ret <2 x i4> %r } ; ============================================================================ ; ; Negative tests. Should not be folded. ; ============================================================================ ; ; One use only. declare void @use4(<2 x i4>) define <2 x i4> @n_oneuse_D_is_ok (<2 x i4> %x, <2 x i4> %y, <2 x i4> %m) { ; CHECK-LABEL: @n_oneuse_D_is_ok( ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[X:%.*]], [[Y:%.*]] ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i4> [[N0]], [[M:%.*]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[TMP1]], [[X]] ; CHECK-NEXT: call void @use4(<2 x i4> [[N0]]) ; CHECK-NEXT: ret <2 x i4> [[R]] ; %im = xor <2 x i4> %m, %n0 = xor <2 x i4> %x, %y ; two uses of %n0, THIS IS OK! %n1 = and <2 x i4> %n0, %im %r = xor <2 x i4> %n1, %y call void @use4(<2 x i4> %n0) ret <2 x i4> %r } define <2 x i4> @n_oneuse_A (<2 x i4> %x, <2 x i4> %y, <2 x i4> %m) { ; CHECK-LABEL: @n_oneuse_A( ; CHECK-NEXT: [[IM:%.*]] = xor <2 x i4> [[M:%.*]], ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[X:%.*]], [[Y:%.*]] ; CHECK-NEXT: [[N1:%.*]] = and <2 x i4> [[N0]], [[IM]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[N1]], [[Y]] ; CHECK-NEXT: call void @use4(<2 x i4> [[N1]]) ; CHECK-NEXT: ret <2 x i4> [[R]] ; %im = xor <2 x i4> %m, %n0 = xor <2 x i4> %x, %y %n1 = and <2 x i4> %n0, %im ; two uses of %n1, which is going to be replaced %r = xor <2 x i4> %n1, %y call void @use4(<2 x i4> %n1) ret <2 x i4> %r } define <2 x i4> @n_oneuse_AD (<2 x i4> %x, <2 x i4> %y, <2 x i4> %m) { ; CHECK-LABEL: @n_oneuse_AD( ; CHECK-NEXT: [[IM:%.*]] = xor <2 x i4> [[M:%.*]], ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[X:%.*]], [[Y:%.*]] ; CHECK-NEXT: [[N1:%.*]] = and <2 x i4> [[N0]], [[IM]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[N1]], [[Y]] ; CHECK-NEXT: call void @use4(<2 x i4> [[N0]]) ; CHECK-NEXT: call void @use4(<2 x i4> [[N1]]) ; CHECK-NEXT: ret <2 x i4> [[R]] ; %im = xor <2 x i4> %m, %n0 = xor <2 x i4> %x, %y ; two uses of %n0 IS OK %n1 = and <2 x i4> %n0, %im ; two uses of %n1, which is going to be replaced %r = xor <2 x i4> %n1, %y call void @use4(<2 x i4> %n0) call void @use4(<2 x i4> %n1) ret <2 x i4> %r } ; Some third variable is used define <2 x i4> @n_third_var (<2 x i4> %x, <2 x i4> %y, <2 x i4> %z, <2 x i4> %m) { ; CHECK-LABEL: @n_third_var( ; CHECK-NEXT: [[IM:%.*]] = xor <2 x i4> [[M:%.*]], ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[X:%.*]], [[Y:%.*]] ; CHECK-NEXT: [[N1:%.*]] = and <2 x i4> [[N0]], [[IM]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[N1]], [[Z:%.*]] ; CHECK-NEXT: ret <2 x i4> [[R]] ; %im = xor <2 x i4> %m, %n0 = xor <2 x i4> %x, %y %n1 = and <2 x i4> %n0, %im %r = xor <2 x i4> %n1, %z ; not %x or %y ret <2 x i4> %r } define <2 x i4> @n_third_var_const(<2 x i4> %x, <2 x i4> %y, <2 x i4> %mask) { ; CHECK-LABEL: @n_third_var_const( ; CHECK-NEXT: [[NOTMASK:%.*]] = xor <2 x i4> [[MASK:%.*]], ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[X:%.*]], ; CHECK-NEXT: [[N1:%.*]] = and <2 x i4> [[N0]], [[NOTMASK]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[N1]], ; CHECK-NEXT: ret <2 x i4> [[R]] ; %notmask = xor <2 x i4> %mask, %n0 = xor <2 x i4> %x, ; %x %n1 = and <2 x i4> %n0, %notmask %r = xor <2 x i4> %n1, ret <2 x i4> %r } ; Bad xor define <2 x i4> @n_badxor_splat (<2 x i4> %x, <2 x i4> %y, <2 x i4> %m) { ; CHECK-LABEL: @n_badxor_splat( ; CHECK-NEXT: [[IM:%.*]] = xor <2 x i4> [[M:%.*]], ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[X:%.*]], [[Y:%.*]] ; CHECK-NEXT: [[N1:%.*]] = and <2 x i4> [[N0]], [[IM]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[N1]], [[Y]] ; CHECK-NEXT: ret <2 x i4> [[R]] ; %im = xor <2 x i4> %m, ; not -1 %n0 = xor <2 x i4> %x, %y %n1 = and <2 x i4> %n0, %im ; two uses of %n1, which is going to be replaced %r = xor <2 x i4> %n1, %y ret <2 x i4> %r } define <2 x i4> @n_badxor (<2 x i4> %x, <2 x i4> %y, <2 x i4> %m) { ; CHECK-LABEL: @n_badxor( ; CHECK-NEXT: [[IM:%.*]] = xor <2 x i4> [[M:%.*]], ; CHECK-NEXT: [[N0:%.*]] = xor <2 x i4> [[X:%.*]], [[Y:%.*]] ; CHECK-NEXT: [[N1:%.*]] = and <2 x i4> [[N0]], [[IM]] ; CHECK-NEXT: [[R:%.*]] = xor <2 x i4> [[N1]], [[Y]] ; CHECK-NEXT: ret <2 x i4> [[R]] ; %im = xor <2 x i4> %m, ; not -1 %n0 = xor <2 x i4> %x, %y %n1 = and <2 x i4> %n0, %im ; two uses of %n1, which is going to be replaced %r = xor <2 x i4> %n1, %y ret <2 x i4> %r }