| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -S -early-cse -earlycse-debug-hash | FileCheck %s |
| ; RUN: opt < %s -S -basicaa -early-cse-memssa | FileCheck %s |
| |
| define void @test1(float %A, float %B, float* %PA, float* %PB) { |
| ; CHECK-LABEL: @test1( |
| ; CHECK-NEXT: [[C:%.*]] = fadd float [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: store float [[C]], float* [[PA:%.*]] |
| ; CHECK-NEXT: store float [[C]], float* [[PB:%.*]] |
| ; CHECK-NEXT: ret void |
| ; |
| %C = fadd float %A, %B |
| store float %C, float* %PA |
| %D = fadd float %B, %A |
| store float %D, float* %PB |
| ret void |
| } |
| |
| define void @test2(float %A, float %B, i1* %PA, i1* %PB) { |
| ; CHECK-LABEL: @test2( |
| ; CHECK-NEXT: [[C:%.*]] = fcmp oeq float [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: store i1 [[C]], i1* [[PA:%.*]] |
| ; CHECK-NEXT: store i1 [[C]], i1* [[PB:%.*]] |
| ; CHECK-NEXT: ret void |
| ; |
| %C = fcmp oeq float %A, %B |
| store i1 %C, i1* %PA |
| %D = fcmp oeq float %B, %A |
| store i1 %D, i1* %PB |
| ret void |
| } |
| |
| define void @test3(float %A, float %B, i1* %PA, i1* %PB) { |
| ; CHECK-LABEL: @test3( |
| ; CHECK-NEXT: [[C:%.*]] = fcmp uge float [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: store i1 [[C]], i1* [[PA:%.*]] |
| ; CHECK-NEXT: store i1 [[C]], i1* [[PB:%.*]] |
| ; CHECK-NEXT: ret void |
| ; |
| %C = fcmp uge float %A, %B |
| store i1 %C, i1* %PA |
| %D = fcmp ule float %B, %A |
| store i1 %D, i1* %PB |
| ret void |
| } |
| |
| define void @test4(i32 %A, i32 %B, i1* %PA, i1* %PB) { |
| ; CHECK-LABEL: @test4( |
| ; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: store i1 [[C]], i1* [[PA:%.*]] |
| ; CHECK-NEXT: store i1 [[C]], i1* [[PB:%.*]] |
| ; CHECK-NEXT: ret void |
| ; |
| %C = icmp eq i32 %A, %B |
| store i1 %C, i1* %PA |
| %D = icmp eq i32 %B, %A |
| store i1 %D, i1* %PB |
| ret void |
| } |
| |
| define void @test5(i32 %A, i32 %B, i1* %PA, i1* %PB) { |
| ; CHECK-LABEL: @test5( |
| ; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: store i1 [[C]], i1* [[PA:%.*]] |
| ; CHECK-NEXT: store i1 [[C]], i1* [[PB:%.*]] |
| ; CHECK-NEXT: ret void |
| ; |
| %C = icmp sgt i32 %A, %B |
| store i1 %C, i1* %PA |
| %D = icmp slt i32 %B, %A |
| store i1 %D, i1* %PB |
| ret void |
| } |
| |
| ; Test degenerate case of commuted compare of identical comparands. |
| |
| define void @test6(float %f, i1* %p1, i1* %p2) { |
| ; CHECK-LABEL: @test6( |
| ; CHECK-NEXT: [[C1:%.*]] = fcmp ult float [[F:%.*]], [[F]] |
| ; CHECK-NEXT: store i1 [[C1]], i1* [[P1:%.*]] |
| ; CHECK-NEXT: store i1 [[C1]], i1* [[P2:%.*]] |
| ; CHECK-NEXT: ret void |
| ; |
| %c1 = fcmp ult float %f, %f |
| %c2 = fcmp ugt float %f, %f |
| store i1 %c1, i1* %p1 |
| store i1 %c2, i1* %p2 |
| ret void |
| } |
| |
| ; Min/max operands may be commuted in the compare and select. |
| |
| define i8 @smin_commute(i8 %a, i8 %b) { |
| ; CHECK-LABEL: @smin_commute( |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i8 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i8 [[B]], [[A]] |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[A]], i8 [[B]] |
| ; CHECK-NEXT: [[R:%.*]] = mul i8 [[M1]], [[M1]] |
| ; CHECK-NEXT: ret i8 [[R]] |
| ; |
| %cmp1 = icmp slt i8 %a, %b |
| %cmp2 = icmp slt i8 %b, %a |
| %m1 = select i1 %cmp1, i8 %a, i8 %b |
| %m2 = select i1 %cmp2, i8 %b, i8 %a |
| %r = mul i8 %m1, %m2 |
| ret i8 %r |
| } |
| |
| ; Min/max can also have a swapped predicate and select operands. |
| |
| define i1 @smin_swapped(i8 %a, i8 %b) { |
| ; CHECK-LABEL: @smin_swapped( |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i8 [[A]], [[B]] |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[B]], i8 [[A]] |
| ; CHECK-NEXT: ret i1 true |
| ; |
| %cmp1 = icmp sgt i8 %a, %b |
| %cmp2 = icmp slt i8 %a, %b |
| %m1 = select i1 %cmp1, i8 %b, i8 %a |
| %m2 = select i1 %cmp2, i8 %a, i8 %b |
| %r = icmp eq i8 %m2, %m1 |
| ret i1 %r |
| } |
| |
| ; Min/max can also have an inverted predicate and select operands. |
| |
| define i1 @smin_inverted(i8 %a, i8 %b) { |
| ; CHECK-LABEL: @smin_inverted( |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i8 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP2:%.*]] = xor i1 [[CMP1]], true |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[A]], i8 [[B]] |
| ; CHECK-NEXT: ret i1 true |
| ; |
| %cmp1 = icmp slt i8 %a, %b |
| %cmp2 = xor i1 %cmp1, -1 |
| %m1 = select i1 %cmp1, i8 %a, i8 %b |
| %m2 = select i1 %cmp2, i8 %b, i8 %a |
| %r = icmp eq i8 %m1, %m2 |
| ret i1 %r |
| } |
| |
| define i8 @smax_commute(i8 %a, i8 %b) { |
| ; CHECK-LABEL: @smax_commute( |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i8 [[B]], [[A]] |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[A]], i8 [[B]] |
| ; CHECK-NEXT: ret i8 0 |
| ; |
| %cmp1 = icmp sgt i8 %a, %b |
| %cmp2 = icmp sgt i8 %b, %a |
| %m1 = select i1 %cmp1, i8 %a, i8 %b |
| %m2 = select i1 %cmp2, i8 %b, i8 %a |
| %r = urem i8 %m2, %m1 |
| ret i8 %r |
| } |
| |
| define i8 @smax_swapped(i8 %a, i8 %b) { |
| ; CHECK-LABEL: @smax_swapped( |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i8 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i8 [[A]], [[B]] |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[B]], i8 [[A]] |
| ; CHECK-NEXT: ret i8 1 |
| ; |
| %cmp1 = icmp slt i8 %a, %b |
| %cmp2 = icmp sgt i8 %a, %b |
| %m1 = select i1 %cmp1, i8 %b, i8 %a |
| %m2 = select i1 %cmp2, i8 %a, i8 %b |
| %r = sdiv i8 %m1, %m2 |
| ret i8 %r |
| } |
| |
| define i1 @smax_inverted(i8 %a, i8 %b) { |
| ; CHECK-LABEL: @smax_inverted( |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP2:%.*]] = xor i1 [[CMP1]], true |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[A]], i8 [[B]] |
| ; CHECK-NEXT: ret i1 true |
| ; |
| %cmp1 = icmp sgt i8 %a, %b |
| %cmp2 = xor i1 %cmp1, -1 |
| %m1 = select i1 %cmp1, i8 %a, i8 %b |
| %m2 = select i1 %cmp2, i8 %b, i8 %a |
| %r = icmp eq i8 %m1, %m2 |
| ret i1 %r |
| } |
| |
| define i8 @umin_commute(i8 %a, i8 %b) { |
| ; CHECK-LABEL: @umin_commute( |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i8 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i8 [[B]], [[A]] |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[A]], i8 [[B]] |
| ; CHECK-NEXT: ret i8 0 |
| ; |
| %cmp1 = icmp ult i8 %a, %b |
| %cmp2 = icmp ult i8 %b, %a |
| %m1 = select i1 %cmp1, i8 %a, i8 %b |
| %m2 = select i1 %cmp2, i8 %b, i8 %a |
| %r = sub i8 %m2, %m1 |
| ret i8 %r |
| } |
| |
| ; Choose a vector type just to show that works. |
| |
| define <2 x i8> @umin_swapped(<2 x i8> %a, <2 x i8> %b) { |
| ; CHECK-LABEL: @umin_swapped( |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt <2 x i8> [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp ult <2 x i8> [[A]], [[B]] |
| ; CHECK-NEXT: [[M1:%.*]] = select <2 x i1> [[CMP1]], <2 x i8> [[B]], <2 x i8> [[A]] |
| ; CHECK-NEXT: ret <2 x i8> zeroinitializer |
| ; |
| %cmp1 = icmp ugt <2 x i8> %a, %b |
| %cmp2 = icmp ult <2 x i8> %a, %b |
| %m1 = select <2 x i1> %cmp1, <2 x i8> %b, <2 x i8> %a |
| %m2 = select <2 x i1> %cmp2, <2 x i8> %a, <2 x i8> %b |
| %r = sub <2 x i8> %m2, %m1 |
| ret <2 x i8> %r |
| } |
| |
| define i1 @umin_inverted(i8 %a, i8 %b) { |
| ; CHECK-LABEL: @umin_inverted( |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i8 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP2:%.*]] = xor i1 [[CMP1]], true |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[A]], i8 [[B]] |
| ; CHECK-NEXT: ret i1 true |
| ; |
| %cmp1 = icmp ult i8 %a, %b |
| %cmp2 = xor i1 %cmp1, -1 |
| %m1 = select i1 %cmp1, i8 %a, i8 %b |
| %m2 = select i1 %cmp2, i8 %b, i8 %a |
| %r = icmp eq i8 %m1, %m2 |
| ret i1 %r |
| } |
| |
| define i8 @umax_commute(i8 %a, i8 %b) { |
| ; CHECK-LABEL: @umax_commute( |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i8 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i8 [[B]], [[A]] |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[A]], i8 [[B]] |
| ; CHECK-NEXT: ret i8 1 |
| ; |
| %cmp1 = icmp ugt i8 %a, %b |
| %cmp2 = icmp ugt i8 %b, %a |
| %m1 = select i1 %cmp1, i8 %a, i8 %b |
| %m2 = select i1 %cmp2, i8 %b, i8 %a |
| %r = udiv i8 %m1, %m2 |
| ret i8 %r |
| } |
| |
| define i8 @umax_swapped(i8 %a, i8 %b) { |
| ; CHECK-LABEL: @umax_swapped( |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i8 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i8 [[A]], [[B]] |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[B]], i8 [[A]] |
| ; CHECK-NEXT: [[R:%.*]] = add i8 [[M1]], [[M1]] |
| ; CHECK-NEXT: ret i8 [[R]] |
| ; |
| %cmp1 = icmp ult i8 %a, %b |
| %cmp2 = icmp ugt i8 %a, %b |
| %m1 = select i1 %cmp1, i8 %b, i8 %a |
| %m2 = select i1 %cmp2, i8 %a, i8 %b |
| %r = add i8 %m2, %m1 |
| ret i8 %r |
| } |
| |
| define i1 @umax_inverted(i8 %a, i8 %b) { |
| ; CHECK-LABEL: @umax_inverted( |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i8 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP2:%.*]] = xor i1 [[CMP1]], true |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[A]], i8 [[B]] |
| ; CHECK-NEXT: ret i1 true |
| ; |
| %cmp1 = icmp ugt i8 %a, %b |
| %cmp2 = xor i1 %cmp1, -1 |
| %m1 = select i1 %cmp1, i8 %a, i8 %b |
| %m2 = select i1 %cmp2, i8 %b, i8 %a |
| %r = icmp eq i8 %m1, %m2 |
| ret i1 %r |
| } |
| |
| ; Min/max may exist with non-canonical operands. Value tracking can match those. |
| |
| define i8 @smax_nsw(i8 %a, i8 %b) { |
| ; CHECK-LABEL: @smax_nsw( |
| ; CHECK-NEXT: [[SUB:%.*]] = sub nsw i8 [[A:%.*]], [[B:%.*]] |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i8 [[A]], [[B]] |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i8 [[SUB]], 0 |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 0, i8 [[SUB]] |
| ; CHECK-NEXT: ret i8 0 |
| ; |
| %sub = sub nsw i8 %a, %b |
| %cmp1 = icmp slt i8 %a, %b |
| %cmp2 = icmp sgt i8 %sub, 0 |
| %m1 = select i1 %cmp1, i8 0, i8 %sub |
| %m2 = select i1 %cmp2, i8 %sub, i8 0 |
| %r = sub i8 %m2, %m1 |
| ret i8 %r |
| } |
| |
| define i8 @abs_swapped(i8 %a) { |
| ; CHECK-LABEL: @abs_swapped( |
| ; CHECK-NEXT: [[NEG:%.*]] = sub i8 0, [[A:%.*]] |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 [[A]], 0 |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i8 [[A]], 0 |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[A]], i8 [[NEG]] |
| ; CHECK-NEXT: ret i8 [[M1]] |
| ; |
| %neg = sub i8 0, %a |
| %cmp1 = icmp sgt i8 %a, 0 |
| %cmp2 = icmp slt i8 %a, 0 |
| %m1 = select i1 %cmp1, i8 %a, i8 %neg |
| %m2 = select i1 %cmp2, i8 %neg, i8 %a |
| %r = or i8 %m2, %m1 |
| ret i8 %r |
| } |
| |
| define i8 @abs_inverted(i8 %a) { |
| ; CHECK-LABEL: @abs_inverted( |
| ; CHECK-NEXT: [[NEG:%.*]] = sub i8 0, [[A:%.*]] |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 [[A]], 0 |
| ; CHECK-NEXT: [[CMP2:%.*]] = xor i1 [[CMP1]], true |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[A]], i8 [[NEG]] |
| ; CHECK-NEXT: ret i8 [[M1]] |
| ; |
| %neg = sub i8 0, %a |
| %cmp1 = icmp sgt i8 %a, 0 |
| %cmp2 = xor i1 %cmp1, -1 |
| %m1 = select i1 %cmp1, i8 %a, i8 %neg |
| %m2 = select i1 %cmp2, i8 %neg, i8 %a |
| %r = or i8 %m2, %m1 |
| ret i8 %r |
| } |
| |
| define i8 @nabs_swapped(i8 %a) { |
| ; CHECK-LABEL: @nabs_swapped( |
| ; CHECK-NEXT: [[NEG:%.*]] = sub i8 0, [[A:%.*]] |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i8 [[A]], 0 |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i8 [[A]], 0 |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[A]], i8 [[NEG]] |
| ; CHECK-NEXT: ret i8 0 |
| ; |
| %neg = sub i8 0, %a |
| %cmp1 = icmp slt i8 %a, 0 |
| %cmp2 = icmp sgt i8 %a, 0 |
| %m1 = select i1 %cmp1, i8 %a, i8 %neg |
| %m2 = select i1 %cmp2, i8 %neg, i8 %a |
| %r = xor i8 %m2, %m1 |
| ret i8 %r |
| } |
| |
| define i8 @nabs_inverted(i8 %a) { |
| ; CHECK-LABEL: @nabs_inverted( |
| ; CHECK-NEXT: [[NEG:%.*]] = sub i8 0, [[A:%.*]] |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i8 [[A]], 0 |
| ; CHECK-NEXT: [[CMP2:%.*]] = xor i1 [[CMP1]], true |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[A]], i8 [[NEG]] |
| ; CHECK-NEXT: ret i8 0 |
| ; |
| %neg = sub i8 0, %a |
| %cmp1 = icmp slt i8 %a, 0 |
| %cmp2 = xor i1 %cmp1, -1 |
| %m1 = select i1 %cmp1, i8 %a, i8 %neg |
| %m2 = select i1 %cmp2, i8 %neg, i8 %a |
| %r = xor i8 %m2, %m1 |
| ret i8 %r |
| } |
| |
| ; These two tests make sure we still consider it a match when the RHS of the |
| ; compares are different. |
| define i8 @abs_different_constants(i8 %a) { |
| ; CHECK-LABEL: @abs_different_constants( |
| ; CHECK-NEXT: [[NEG:%.*]] = sub i8 0, [[A:%.*]] |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 [[A]], -1 |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i8 [[A]], 0 |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[A]], i8 [[NEG]] |
| ; CHECK-NEXT: ret i8 [[M1]] |
| ; |
| %neg = sub i8 0, %a |
| %cmp1 = icmp sgt i8 %a, -1 |
| %cmp2 = icmp slt i8 %a, 0 |
| %m1 = select i1 %cmp1, i8 %a, i8 %neg |
| %m2 = select i1 %cmp2, i8 %neg, i8 %a |
| %r = or i8 %m2, %m1 |
| ret i8 %r |
| } |
| |
| define i8 @nabs_different_constants(i8 %a) { |
| ; CHECK-LABEL: @nabs_different_constants( |
| ; CHECK-NEXT: [[NEG:%.*]] = sub i8 0, [[A:%.*]] |
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i8 [[A]], 0 |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i8 [[A]], -1 |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 [[A]], i8 [[NEG]] |
| ; CHECK-NEXT: ret i8 0 |
| ; |
| %neg = sub i8 0, %a |
| %cmp1 = icmp slt i8 %a, 0 |
| %cmp2 = icmp sgt i8 %a, -1 |
| %m1 = select i1 %cmp1, i8 %a, i8 %neg |
| %m2 = select i1 %cmp2, i8 %neg, i8 %a |
| %r = xor i8 %m2, %m1 |
| ret i8 %r |
| } |
| |
| ; https://bugs.llvm.org/show_bug.cgi?id=41101 |
| ; Detect equivalence of selects with commuted operands: 'not' cond. |
| |
| define i32 @select_not_cond(i1 %cond, i32 %t, i32 %f) { |
| ; CHECK-LABEL: @select_not_cond( |
| ; CHECK-NEXT: [[NOT:%.*]] = xor i1 [[COND:%.*]], true |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[COND]], i32 [[T:%.*]], i32 [[F:%.*]] |
| ; CHECK-NEXT: ret i32 0 |
| ; |
| %not = xor i1 %cond, -1 |
| %m1 = select i1 %cond, i32 %t, i32 %f |
| %m2 = select i1 %not, i32 %f, i32 %t |
| %r = xor i32 %m2, %m1 |
| ret i32 %r |
| } |
| |
| ; Detect equivalence of selects with commuted operands: 'not' cond with vector select. |
| |
| define <2 x double> @select_not_cond_commute_vec(<2 x i1> %cond, <2 x double> %t, <2 x double> %f) { |
| ; CHECK-LABEL: @select_not_cond_commute_vec( |
| ; CHECK-NEXT: [[NOT:%.*]] = xor <2 x i1> [[COND:%.*]], <i1 true, i1 true> |
| ; CHECK-NEXT: [[M1:%.*]] = select <2 x i1> [[COND]], <2 x double> [[T:%.*]], <2 x double> [[F:%.*]] |
| ; CHECK-NEXT: ret <2 x double> <double 1.000000e+00, double 1.000000e+00> |
| ; |
| %not = xor <2 x i1> %cond, <i1 -1, i1 -1> |
| %m1 = select <2 x i1> %cond, <2 x double> %t, <2 x double> %f |
| %m2 = select <2 x i1> %not, <2 x double> %f, <2 x double> %t |
| %r = fdiv nnan <2 x double> %m1, %m2 |
| ret <2 x double> %r |
| } |
| |
| ; Negative test - select ops must be commuted. |
| |
| define i32 @select_not_cond_wrong_select_ops(i1 %cond, i32 %t, i32 %f) { |
| ; CHECK-LABEL: @select_not_cond_wrong_select_ops( |
| ; CHECK-NEXT: [[NOT:%.*]] = xor i1 [[COND:%.*]], true |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[COND]], i32 [[T:%.*]], i32 [[F:%.*]] |
| ; CHECK-NEXT: [[M2:%.*]] = select i1 [[NOT]], i32 [[T]], i32 [[F]] |
| ; CHECK-NEXT: [[R:%.*]] = xor i32 [[M2]], [[M1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %not = xor i1 %cond, -1 |
| %m1 = select i1 %cond, i32 %t, i32 %f |
| %m2 = select i1 %not, i32 %t, i32 %f |
| %r = xor i32 %m2, %m1 |
| ret i32 %r |
| } |
| |
| ; Negative test - not a 'not'. |
| |
| define i32 @select_not_cond_wrong_cond(i1 %cond, i32 %t, i32 %f) { |
| ; CHECK-LABEL: @select_not_cond_wrong_cond( |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[COND:%.*]], i32 [[T:%.*]], i32 [[F:%.*]] |
| ; CHECK-NEXT: [[M2:%.*]] = select i1 [[COND]], i32 [[F]], i32 [[T]] |
| ; CHECK-NEXT: [[R:%.*]] = xor i32 [[M2]], [[M1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %not = xor i1 %cond, -2 |
| %m1 = select i1 %cond, i32 %t, i32 %f |
| %m2 = select i1 %not, i32 %f, i32 %t |
| %r = xor i32 %m2, %m1 |
| ret i32 %r |
| } |
| |
| ; Detect equivalence of selects with commuted operands: inverted pred with fcmps. |
| |
| define i32 @select_invert_pred_cond(float %x, i32 %t, i32 %f) { |
| ; CHECK-LABEL: @select_invert_pred_cond( |
| ; CHECK-NEXT: [[COND:%.*]] = fcmp ueq float [[X:%.*]], 4.200000e+01 |
| ; CHECK-NEXT: [[INVCOND:%.*]] = fcmp one float [[X]], 4.200000e+01 |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[COND]], i32 [[T:%.*]], i32 [[F:%.*]] |
| ; CHECK-NEXT: ret i32 0 |
| ; |
| %cond = fcmp ueq float %x, 42.0 |
| %invcond = fcmp one float %x, 42.0 |
| %m1 = select i1 %cond, i32 %t, i32 %f |
| %m2 = select i1 %invcond, i32 %f, i32 %t |
| %r = xor i32 %m2, %m1 |
| ret i32 %r |
| } |
| |
| ; Detect equivalence of selects with commuted operands: inverted pred with icmps and vectors. |
| |
| define <2 x i32> @select_invert_pred_cond_commute_vec(<2 x i8> %x, <2 x i32> %t, <2 x i32> %f) { |
| ; CHECK-LABEL: @select_invert_pred_cond_commute_vec( |
| ; CHECK-NEXT: [[COND:%.*]] = icmp sgt <2 x i8> [[X:%.*]], <i8 42, i8 -1> |
| ; CHECK-NEXT: [[INVCOND:%.*]] = icmp sle <2 x i8> [[X]], <i8 42, i8 -1> |
| ; CHECK-NEXT: [[M1:%.*]] = select <2 x i1> [[COND]], <2 x i32> [[T:%.*]], <2 x i32> [[F:%.*]] |
| ; CHECK-NEXT: ret <2 x i32> zeroinitializer |
| ; |
| %cond = icmp sgt <2 x i8> %x, <i8 42, i8 -1> |
| %invcond = icmp sle <2 x i8> %x, <i8 42, i8 -1> |
| %m1 = select <2 x i1> %cond, <2 x i32> %t, <2 x i32> %f |
| %m2 = select <2 x i1> %invcond, <2 x i32> %f, <2 x i32> %t |
| %r = xor <2 x i32> %m1, %m2 |
| ret <2 x i32> %r |
| } |
| |
| ; Negative test - select ops must be commuted. |
| |
| define i32 @select_invert_pred_wrong_select_ops(float %x, i32 %t, i32 %f) { |
| ; CHECK-LABEL: @select_invert_pred_wrong_select_ops( |
| ; CHECK-NEXT: [[COND:%.*]] = fcmp ueq float [[X:%.*]], 4.200000e+01 |
| ; CHECK-NEXT: [[INVCOND:%.*]] = fcmp one float [[X]], 4.200000e+01 |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[COND]], i32 [[F:%.*]], i32 [[T:%.*]] |
| ; CHECK-NEXT: [[M2:%.*]] = select i1 [[INVCOND]], i32 [[F]], i32 [[T]] |
| ; CHECK-NEXT: [[R:%.*]] = xor i32 [[M2]], [[M1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %cond = fcmp ueq float %x, 42.0 |
| %invcond = fcmp one float %x, 42.0 |
| %m1 = select i1 %cond, i32 %f, i32 %t |
| %m2 = select i1 %invcond, i32 %f, i32 %t |
| %r = xor i32 %m2, %m1 |
| ret i32 %r |
| } |
| |
| ; Negative test - not an inverted predicate. |
| |
| define i32 @select_invert_pred_wrong_cond(float %x, i32 %t, i32 %f) { |
| ; CHECK-LABEL: @select_invert_pred_wrong_cond( |
| ; CHECK-NEXT: [[COND:%.*]] = fcmp ueq float [[X:%.*]], 4.200000e+01 |
| ; CHECK-NEXT: [[INVCOND:%.*]] = fcmp une float [[X]], 4.200000e+01 |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[COND]], i32 [[T:%.*]], i32 [[F:%.*]] |
| ; CHECK-NEXT: [[M2:%.*]] = select i1 [[INVCOND]], i32 [[F]], i32 [[T]] |
| ; CHECK-NEXT: [[R:%.*]] = xor i32 [[M2]], [[M1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %cond = fcmp ueq float %x, 42.0 |
| %invcond = fcmp une float %x, 42.0 |
| %m1 = select i1 %cond, i32 %t, i32 %f |
| %m2 = select i1 %invcond, i32 %f, i32 %t |
| %r = xor i32 %m2, %m1 |
| ret i32 %r |
| } |
| |
| ; Negative test - cmp ops must match. |
| |
| define i32 @select_invert_pred_wrong_cmp_ops(float %x, i32 %t, i32 %f) { |
| ; CHECK-LABEL: @select_invert_pred_wrong_cmp_ops( |
| ; CHECK-NEXT: [[COND:%.*]] = fcmp ueq float [[X:%.*]], 4.200000e+01 |
| ; CHECK-NEXT: [[INVCOND:%.*]] = fcmp one float [[X]], 4.300000e+01 |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[COND]], i32 [[T:%.*]], i32 [[F:%.*]] |
| ; CHECK-NEXT: [[M2:%.*]] = select i1 [[INVCOND]], i32 [[F]], i32 [[T]] |
| ; CHECK-NEXT: [[R:%.*]] = xor i32 [[M2]], [[M1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %cond = fcmp ueq float %x, 42.0 |
| %invcond = fcmp one float %x, 43.0 |
| %m1 = select i1 %cond, i32 %t, i32 %f |
| %m2 = select i1 %invcond, i32 %f, i32 %t |
| %r = xor i32 %m2, %m1 |
| ret i32 %r |
| } |
| |
| ; If we have both an inverted predicate and a 'not' op, recognize the double-negation. |
| |
| define i32 @select_not_invert_pred_cond(i8 %x, i32 %t, i32 %f) { |
| ; CHECK-LABEL: @select_not_invert_pred_cond( |
| ; CHECK-NEXT: [[COND:%.*]] = icmp ugt i8 [[X:%.*]], 42 |
| ; CHECK-NEXT: [[INVCOND:%.*]] = icmp ule i8 [[X]], 42 |
| ; CHECK-NEXT: [[NOT:%.*]] = xor i1 [[INVCOND]], true |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[COND]], i32 [[T:%.*]], i32 [[F:%.*]] |
| ; CHECK-NEXT: ret i32 0 |
| ; |
| %cond = icmp ugt i8 %x, 42 |
| %invcond = icmp ule i8 %x, 42 |
| %not = xor i1 %invcond, -1 |
| %m1 = select i1 %cond, i32 %t, i32 %f |
| %m2 = select i1 %not, i32 %t, i32 %f |
| %r = sub i32 %m1, %m2 |
| ret i32 %r |
| } |
| |
| ; If we have both an inverted predicate and a 'not' op, recognize the double-negation. |
| |
| define i32 @select_not_invert_pred_cond_commute(i8 %x, i8 %y, i32 %t, i32 %f) { |
| ; CHECK-LABEL: @select_not_invert_pred_cond_commute( |
| ; CHECK-NEXT: [[INVCOND:%.*]] = icmp ule i8 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: [[NOT:%.*]] = xor i1 [[INVCOND]], true |
| ; CHECK-NEXT: [[M2:%.*]] = select i1 [[NOT]], i32 [[T:%.*]], i32 [[F:%.*]] |
| ; CHECK-NEXT: [[COND:%.*]] = icmp ugt i8 [[X]], [[Y]] |
| ; CHECK-NEXT: ret i32 0 |
| ; |
| %invcond = icmp ule i8 %x, %y |
| %not = xor i1 %invcond, -1 |
| %m2 = select i1 %not, i32 %t, i32 %f |
| %cond = icmp ugt i8 %x, %y |
| %m1 = select i1 %cond, i32 %t, i32 %f |
| %r = sub i32 %m2, %m1 |
| ret i32 %r |
| } |
| |
| ; Negative test - not an inverted predicate. |
| |
| define i32 @select_not_invert_pred_cond_wrong_pred(i8 %x, i8 %y, i32 %t, i32 %f) { |
| ; CHECK-LABEL: @select_not_invert_pred_cond_wrong_pred( |
| ; CHECK-NEXT: [[INVCOND:%.*]] = icmp ult i8 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: [[NOT:%.*]] = xor i1 [[INVCOND]], true |
| ; CHECK-NEXT: [[M2:%.*]] = select i1 [[NOT]], i32 [[T:%.*]], i32 [[F:%.*]] |
| ; CHECK-NEXT: [[COND:%.*]] = icmp ugt i8 [[X]], [[Y]] |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[COND]], i32 [[T]], i32 [[F]] |
| ; CHECK-NEXT: [[R:%.*]] = sub i32 [[M2]], [[M1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %invcond = icmp ult i8 %x, %y |
| %not = xor i1 %invcond, -1 |
| %m2 = select i1 %not, i32 %t, i32 %f |
| %cond = icmp ugt i8 %x, %y |
| %m1 = select i1 %cond, i32 %t, i32 %f |
| %r = sub i32 %m2, %m1 |
| ret i32 %r |
| } |
| |
| ; Negative test - cmp ops must match. |
| |
| define i32 @select_not_invert_pred_cond_wrong_cmp_op(i8 %x, i8 %y, i32 %t, i32 %f) { |
| ; CHECK-LABEL: @select_not_invert_pred_cond_wrong_cmp_op( |
| ; CHECK-NEXT: [[INVCOND:%.*]] = icmp ule i8 [[X:%.*]], 42 |
| ; CHECK-NEXT: [[NOT:%.*]] = xor i1 [[INVCOND]], true |
| ; CHECK-NEXT: [[M2:%.*]] = select i1 [[NOT]], i32 [[T:%.*]], i32 [[F:%.*]] |
| ; CHECK-NEXT: [[COND:%.*]] = icmp ugt i8 [[X]], [[Y:%.*]] |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[COND]], i32 [[T]], i32 [[F]] |
| ; CHECK-NEXT: [[R:%.*]] = sub i32 [[M2]], [[M1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %invcond = icmp ule i8 %x, 42 |
| %not = xor i1 %invcond, -1 |
| %m2 = select i1 %not, i32 %t, i32 %f |
| %cond = icmp ugt i8 %x, %y |
| %m1 = select i1 %cond, i32 %t, i32 %f |
| %r = sub i32 %m2, %m1 |
| ret i32 %r |
| } |
| |
| ; Negative test - select ops must be same (and not commuted). |
| |
| define i32 @select_not_invert_pred_cond_wrong_select_op(i8 %x, i8 %y, i32 %t, i32 %f) { |
| ; CHECK-LABEL: @select_not_invert_pred_cond_wrong_select_op( |
| ; CHECK-NEXT: [[INVCOND:%.*]] = icmp ule i8 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: [[NOT:%.*]] = xor i1 [[INVCOND]], true |
| ; CHECK-NEXT: [[M2:%.*]] = select i1 [[NOT]], i32 [[T:%.*]], i32 [[F:%.*]] |
| ; CHECK-NEXT: [[COND:%.*]] = icmp ugt i8 [[X]], [[Y]] |
| ; CHECK-NEXT: [[M1:%.*]] = select i1 [[COND]], i32 [[F]], i32 [[T]] |
| ; CHECK-NEXT: [[R:%.*]] = sub i32 [[M2]], [[M1]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| %invcond = icmp ule i8 %x, %y |
| %not = xor i1 %invcond, -1 |
| %m2 = select i1 %not, i32 %t, i32 %f |
| %cond = icmp ugt i8 %x, %y |
| %m1 = select i1 %cond, i32 %f, i32 %t |
| %r = sub i32 %m2, %m1 |
| ret i32 %r |
| } |
| |
| |
| ; This test is a reproducer for a bug involving inverted min/max selects |
| ; hashing differently but comparing as equal. It exhibits such a pair of |
| ; values, and we run this test with -earlycse-debug-hash which would catch |
| ; the disagreement and fail if it regressed. This test also includes a |
| ; negation of each negation to check for the same issue one level deeper. |
| define void @not_not_min(i32* %px, i32* %py, i32* %pout) { |
| ; CHECK-LABEL: @not_not_min( |
| ; CHECK-NEXT: [[X:%.*]] = load volatile i32, i32* [[PX:%.*]] |
| ; CHECK-NEXT: [[Y:%.*]] = load volatile i32, i32* [[PY:%.*]] |
| ; CHECK-NEXT: [[CMPA:%.*]] = icmp slt i32 [[X]], [[Y]] |
| ; CHECK-NEXT: [[CMPB:%.*]] = xor i1 [[CMPA]], true |
| ; CHECK-NEXT: [[RA:%.*]] = select i1 [[CMPA]], i32 [[X]], i32 [[Y]] |
| ; CHECK-NEXT: store volatile i32 [[RA]], i32* [[POUT:%.*]] |
| ; CHECK-NEXT: store volatile i32 [[RA]], i32* [[POUT]] |
| ; CHECK-NEXT: store volatile i32 [[RA]], i32* [[POUT]] |
| ; CHECK-NEXT: ret void |
| ; |
| %x = load volatile i32, i32* %px |
| %y = load volatile i32, i32* %py |
| %cmpa = icmp slt i32 %x, %y |
| %cmpb = xor i1 %cmpa, -1 |
| %cmpc = xor i1 %cmpb, -1 |
| %ra = select i1 %cmpa, i32 %x, i32 %y |
| %rb = select i1 %cmpb, i32 %y, i32 %x |
| %rc = select i1 %cmpc, i32 %x, i32 %y |
| store volatile i32 %ra, i32* %pout |
| store volatile i32 %rb, i32* %pout |
| store volatile i32 %rc, i32* %pout |
| |
| ret void |
| } |