| ; NOTE: Assertions have been autogenerated by update_test_checks.py |
| ; RUN: opt < %s -instsimplify -S | FileCheck %s |
| |
| ; Division-by-zero is undef. UB in any vector lane means the whole op is undef. |
| |
| define <2 x i8> @srem_zero_elt_vec_constfold(<2 x i8> %x) { |
| ; CHECK-LABEL: @srem_zero_elt_vec_constfold( |
| ; CHECK-NEXT: ret <2 x i8> undef |
| ; |
| %rem = srem <2 x i8> <i8 1, i8 2>, <i8 0, i8 -42> |
| ret <2 x i8> %rem |
| } |
| |
| define <2 x i8> @urem_zero_elt_vec_constfold(<2 x i8> %x) { |
| ; CHECK-LABEL: @urem_zero_elt_vec_constfold( |
| ; CHECK-NEXT: ret <2 x i8> undef |
| ; |
| %rem = urem <2 x i8> <i8 1, i8 2>, <i8 42, i8 0> |
| ret <2 x i8> %rem |
| } |
| |
| define <2 x i8> @srem_zero_elt_vec(<2 x i8> %x) { |
| ; CHECK-LABEL: @srem_zero_elt_vec( |
| ; CHECK-NEXT: ret <2 x i8> undef |
| ; |
| %rem = srem <2 x i8> %x, <i8 -42, i8 0> |
| ret <2 x i8> %rem |
| } |
| |
| define <2 x i8> @urem_zero_elt_vec(<2 x i8> %x) { |
| ; CHECK-LABEL: @urem_zero_elt_vec( |
| ; CHECK-NEXT: ret <2 x i8> undef |
| ; |
| %rem = urem <2 x i8> %x, <i8 0, i8 42> |
| ret <2 x i8> %rem |
| } |
| |
| ; Division-by-zero is undef. UB in any vector lane means the whole op is undef. |
| ; Thus, we can simplify this: if any element of 'y' is 0, we can do anything. |
| ; Therefore, assume that all elements of 'y' must be 1. |
| |
| define <2 x i1> @srem_bool_vec(<2 x i1> %x, <2 x i1> %y) { |
| ; CHECK-LABEL: @srem_bool_vec( |
| ; CHECK-NEXT: ret <2 x i1> zeroinitializer |
| ; |
| %rem = srem <2 x i1> %x, %y |
| ret <2 x i1> %rem |
| } |
| |
| define <2 x i1> @urem_bool_vec(<2 x i1> %x, <2 x i1> %y) { |
| ; CHECK-LABEL: @urem_bool_vec( |
| ; CHECK-NEXT: ret <2 x i1> zeroinitializer |
| ; |
| %rem = urem <2 x i1> %x, %y |
| ret <2 x i1> %rem |
| } |
| |
| define i32 @select1(i32 %x, i1 %b) { |
| ; CHECK-LABEL: @select1( |
| ; CHECK-NEXT: ret i32 0 |
| ; |
| %rhs = select i1 %b, i32 %x, i32 1 |
| %rem = srem i32 %x, %rhs |
| ret i32 %rem |
| } |
| |
| define i32 @select2(i32 %x, i1 %b) { |
| ; CHECK-LABEL: @select2( |
| ; CHECK-NEXT: ret i32 0 |
| ; |
| %rhs = select i1 %b, i32 %x, i32 1 |
| %rem = urem i32 %x, %rhs |
| ret i32 %rem |
| } |
| |
| define i32 @rem1(i32 %x, i32 %n) { |
| ; CHECK-LABEL: @rem1( |
| ; CHECK-NEXT: [[MOD:%.*]] = srem i32 %x, %n |
| ; CHECK-NEXT: ret i32 [[MOD]] |
| ; |
| %mod = srem i32 %x, %n |
| %mod1 = srem i32 %mod, %n |
| ret i32 %mod1 |
| } |
| |
| define i32 @rem2(i32 %x, i32 %n) { |
| ; CHECK-LABEL: @rem2( |
| ; CHECK-NEXT: [[MOD:%.*]] = urem i32 %x, %n |
| ; CHECK-NEXT: ret i32 [[MOD]] |
| ; |
| %mod = urem i32 %x, %n |
| %mod1 = urem i32 %mod, %n |
| ret i32 %mod1 |
| } |
| |
| define i32 @rem3(i32 %x, i32 %n) { |
| ; CHECK-LABEL: @rem3( |
| ; CHECK-NEXT: [[MOD:%.*]] = srem i32 %x, %n |
| ; CHECK-NEXT: [[MOD1:%.*]] = urem i32 [[MOD]], %n |
| ; CHECK-NEXT: ret i32 [[MOD1]] |
| ; |
| %mod = srem i32 %x, %n |
| %mod1 = urem i32 %mod, %n |
| ret i32 %mod1 |
| } |
| |
| declare i32 @external() |
| |
| define i32 @rem4() { |
| ; CHECK-LABEL: @rem4( |
| ; CHECK-NEXT: [[CALL:%.*]] = call i32 @external(), !range !0 |
| ; CHECK-NEXT: ret i32 [[CALL]] |
| ; |
| %call = call i32 @external(), !range !0 |
| %urem = urem i32 %call, 3 |
| ret i32 %urem |
| } |
| |
| !0 = !{i32 0, i32 3} |