| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -passes=instsimplify -S | FileCheck %s |
| |
| define i32 @add1(i32 %x) { |
| ; CHECK-LABEL: @add1( |
| ; CHECK-NEXT: ret i32 [[X:%.*]] |
| ; |
| ; (X + -1) + 1 -> X |
| %l = add i32 %x, -1 |
| %r = add i32 %l, 1 |
| ret i32 %r |
| } |
| |
| define i32 @and1(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @and1( |
| ; CHECK-NEXT: [[L:%.*]] = and i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: ret i32 [[L]] |
| ; |
| ; (X & Y) & X -> X & Y |
| %l = and i32 %x, %y |
| %r = and i32 %l, %x |
| ret i32 %r |
| } |
| |
| define i32 @and2(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @and2( |
| ; CHECK-NEXT: [[R:%.*]] = and i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| ; X & (X & Y) -> X & Y |
| %r = and i32 %x, %y |
| %l = and i32 %x, %r |
| ret i32 %l |
| } |
| |
| define i32 @or1(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @or1( |
| ; CHECK-NEXT: [[L:%.*]] = or i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: ret i32 [[L]] |
| ; |
| ; (X | Y) | X -> X | Y |
| %l = or i32 %x, %y |
| %r = or i32 %l, %x |
| ret i32 %r |
| } |
| |
| define i32 @or2(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @or2( |
| ; CHECK-NEXT: [[R:%.*]] = or i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| ; X | (X | Y) -> X | Y |
| %r = or i32 %x, %y |
| %l = or i32 %x, %r |
| ret i32 %l |
| } |
| |
| define i32 @xor1(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @xor1( |
| ; CHECK-NEXT: ret i32 [[Y:%.*]] |
| ; |
| ; (X ^ Y) ^ X = Y |
| %l = xor i32 %x, %y |
| %r = xor i32 %l, %x |
| ret i32 %r |
| } |
| |
| define i32 @xor2(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @xor2( |
| ; CHECK-NEXT: ret i32 [[Y:%.*]] |
| ; |
| ; X ^ (X ^ Y) = Y |
| %r = xor i32 %x, %y |
| %l = xor i32 %x, %r |
| ret i32 %l |
| } |
| |
| define i32 @sub1(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @sub1( |
| ; CHECK-NEXT: ret i32 [[Y:%.*]] |
| ; |
| %d = sub i32 %x, %y |
| %r = sub i32 %x, %d |
| ret i32 %r |
| } |
| |
| define i32 @sub2(i32 %x) { |
| ; CHECK-LABEL: @sub2( |
| ; CHECK-NEXT: ret i32 -1 |
| ; |
| ; X - (X + 1) -> -1 |
| %xp1 = add i32 %x, 1 |
| %r = sub i32 %x, %xp1 |
| ret i32 %r |
| } |
| |
| define i32 @sub3(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @sub3( |
| ; CHECK-NEXT: ret i32 [[X:%.*]] |
| ; |
| ; ((X + 1) + Y) - (Y + 1) -> X |
| %xp1 = add i32 %x, 1 |
| %lhs = add i32 %xp1, %y |
| %rhs = add i32 %y, 1 |
| %r = sub i32 %lhs, %rhs |
| ret i32 %r |
| } |
| |
| ; (no overflow X * Y) / Y -> X |
| |
| define i32 @mulnsw_sdiv(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @mulnsw_sdiv( |
| ; CHECK-NEXT: ret i32 [[X:%.*]] |
| ; |
| %mul = mul nsw i32 %x, %y |
| %r = sdiv i32 %mul, %y |
| ret i32 %r |
| } |
| |
| define <2 x i32> @mulnsw_sdiv_commute(<2 x i32> %x, <2 x i32> %y) { |
| ; CHECK-LABEL: @mulnsw_sdiv_commute( |
| ; CHECK-NEXT: ret <2 x i32> [[X:%.*]] |
| ; |
| %mul = mul nsw <2 x i32> %y, %x |
| %r = sdiv <2 x i32> %mul, %y |
| ret <2 x i32> %r |
| } |
| |
| ; (no overflow X * Y) / Y -> X |
| |
| define <2 x i8> @mulnuw_udiv(<2 x i8> %x, <2 x i8> %y) { |
| ; CHECK-LABEL: @mulnuw_udiv( |
| ; CHECK-NEXT: ret <2 x i8> [[X:%.*]] |
| ; |
| %mul = mul nuw <2 x i8> %x, %y |
| %r = udiv <2 x i8> %mul, %y |
| ret <2 x i8> %r |
| } |
| |
| define i32 @mulnuw_udiv_commute(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @mulnuw_udiv_commute( |
| ; CHECK-NEXT: ret i32 [[X:%.*]] |
| ; |
| %mul = mul nuw i32 %y, %x |
| %r = udiv i32 %mul, %y |
| ret i32 %r |
| } |
| |
| ; (((X / Y) * Y) / Y) -> X / Y |
| |
| define i32 @sdiv_mul_sdiv(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @sdiv_mul_sdiv( |
| ; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: ret i32 [[DIV]] |
| ; |
| %div = sdiv i32 %x, %y |
| %mul = mul i32 %div, %y |
| %r = sdiv i32 %mul, %y |
| ret i32 %r |
| } |
| |
| define i32 @sdiv_mul_sdiv_commute(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @sdiv_mul_sdiv_commute( |
| ; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: ret i32 [[DIV]] |
| ; |
| %div = sdiv i32 %x, %y |
| %mul = mul i32 %y, %div |
| %r = sdiv i32 %mul, %y |
| ret i32 %r |
| } |
| |
| ; (((X / Y) * Y) / Y) -> X / Y |
| |
| define i32 @udiv_mul_udiv(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @udiv_mul_udiv( |
| ; CHECK-NEXT: [[DIV:%.*]] = udiv i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: ret i32 [[DIV]] |
| ; |
| %div = udiv i32 %x, %y |
| %mul = mul i32 %div, %y |
| %r = udiv i32 %mul, %y |
| ret i32 %r |
| } |
| |
| define i32 @udiv_mul_udiv_commute(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @udiv_mul_udiv_commute( |
| ; CHECK-NEXT: [[DIV:%.*]] = udiv i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: ret i32 [[DIV]] |
| ; |
| %div = udiv i32 %x, %y |
| %mul = mul i32 %y, %div |
| %r = udiv i32 %mul, %y |
| ret i32 %r |
| } |
| |
| define i32 @sdiv3(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @sdiv3( |
| ; CHECK-NEXT: ret i32 0 |
| ; |
| ; (X rem Y) / Y -> 0 |
| %rem = srem i32 %x, %y |
| %div = sdiv i32 %rem, %y |
| ret i32 %div |
| } |
| |
| define i32 @sdiv4(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @sdiv4( |
| ; CHECK-NEXT: ret i32 [[X:%.*]] |
| ; |
| ; (X / Y) * Y -> X if the division is exact |
| %div = sdiv exact i32 %x, %y |
| %mul = mul i32 %div, %y |
| ret i32 %mul |
| } |
| |
| define i32 @sdiv5(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @sdiv5( |
| ; CHECK-NEXT: ret i32 [[X:%.*]] |
| ; |
| ; Y * (X / Y) -> X if the division is exact |
| %div = sdiv exact i32 %x, %y |
| %mul = mul i32 %y, %div |
| ret i32 %mul |
| } |
| |
| define i32 @udiv3(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @udiv3( |
| ; CHECK-NEXT: ret i32 0 |
| ; |
| ; (X rem Y) / Y -> 0 |
| %rem = urem i32 %x, %y |
| %div = udiv i32 %rem, %y |
| ret i32 %div |
| } |
| |
| define i32 @udiv4(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @udiv4( |
| ; CHECK-NEXT: ret i32 [[X:%.*]] |
| ; |
| ; (X / Y) * Y -> X if the division is exact |
| %div = udiv exact i32 %x, %y |
| %mul = mul i32 %div, %y |
| ret i32 %mul |
| } |
| |
| define i32 @udiv5(i32 %x, i32 %y) { |
| ; CHECK-LABEL: @udiv5( |
| ; CHECK-NEXT: ret i32 [[X:%.*]] |
| ; |
| ; Y * (X / Y) -> X if the division is exact |
| %div = udiv exact i32 %x, %y |
| %mul = mul i32 %y, %div |
| ret i32 %mul |
| } |
| |
| define i16 @trunc1(i32 %x) { |
| ; CHECK-LABEL: @trunc1( |
| ; CHECK-NEXT: ret i16 1 |
| ; |
| %y = add i32 %x, 1 |
| %tx = trunc i32 %x to i16 |
| %ty = trunc i32 %y to i16 |
| %d = sub i16 %ty, %tx |
| ret i16 %d |
| } |