| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -passes=instsimplify -S | FileCheck %s |
| |
| define i32 @common_sub_operand(i32 %X, i32 %Y) { |
| ; CHECK-LABEL: @common_sub_operand( |
| ; CHECK-NEXT: ret i32 [[X:%.*]] |
| ; |
| %Z = sub i32 %X, %Y |
| %Q = add i32 %Z, %Y |
| ret i32 %Q |
| } |
| |
| define i32 @negated_operand(i32 %x) { |
| ; CHECK-LABEL: @negated_operand( |
| ; CHECK-NEXT: ret i32 0 |
| ; |
| %negx = sub i32 0, %x |
| %r = add i32 %negx, %x |
| ret i32 %r |
| } |
| |
| define <2 x i32> @negated_operand_commute_vec(<2 x i32> %x) { |
| ; CHECK-LABEL: @negated_operand_commute_vec( |
| ; CHECK-NEXT: ret <2 x i32> zeroinitializer |
| ; |
| %negx = sub <2 x i32> zeroinitializer, %x |
| %r = add <2 x i32> %x, %negx |
| ret <2 x i32> %r |
| } |
| |
| define i8 @knownnegation(i8 %x, i8 %y) { |
| ; CHECK-LABEL: @knownnegation( |
| ; CHECK-NEXT: ret i8 0 |
| ; |
| %xy = sub i8 %x, %y |
| %yx = sub i8 %y, %x |
| %r = add i8 %xy, %yx |
| ret i8 %r |
| } |
| |
| define <2 x i8> @knownnegation_commute_vec(<2 x i8> %x, <2 x i8> %y) { |
| ; CHECK-LABEL: @knownnegation_commute_vec( |
| ; CHECK-NEXT: ret <2 x i8> zeroinitializer |
| ; |
| %xy = sub <2 x i8> %x, %y |
| %yx = sub <2 x i8> %y, %x |
| %r = add <2 x i8> %yx, %xy |
| ret <2 x i8> %r |
| } |
| |
| define i32 @poison(i32 %x) { |
| ; CHECK-LABEL: @poison( |
| ; CHECK-NEXT: ret i32 poison |
| ; |
| %y = add i32 %x, poison |
| ret i32 %y |
| } |