sub-and-or-neg-xor.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -instcombine -S < %s | FileCheck %s
declare void @use(i32)
define i32 @sub_to_xor(i32 %x, i32 %y) {
; CHECK-LABEL: @sub_to_xor(
; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = sub i32 0, [[TMP1]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%or = or i32 %x, %y
%and = and i32 %x, %y
%sub = sub i32 %and, %or
ret i32 %sub
}
define i32 @sub_to_xor_extra_use_sub(i32 %x, i32 %y) {
; CHECK-LABEL: @sub_to_xor_extra_use_sub(
; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = sub i32 0, [[TMP1]]
; CHECK-NEXT: call void @use(i32 [[SUB]])
; CHECK-NEXT: ret i32 [[SUB]]
;
%or = or i32 %x, %y
%and = and i32 %x, %y
%sub = sub i32 %and, %or
call void @use(i32 %sub)
ret i32 %sub
}
define i32 @sub_to_xor_extra_use_and(i32 %x, i32 %y) {
; CHECK-LABEL: @sub_to_xor_extra_use_and(
; CHECK-NEXT: [[AND:%.*]] = and i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: call void @use(i32 [[AND]])
; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[X]], [[Y]]
; CHECK-NEXT: [[SUB:%.*]] = sub i32 0, [[TMP1]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%or = or i32 %x, %y
%and = and i32 %x, %y
call void @use(i32 %and)
%sub = sub i32 %and, %or
ret i32 %sub
}
define i32 @sub_to_xor_extra_use_or(i32 %x, i32 %y) {
; CHECK-LABEL: @sub_to_xor_extra_use_or(
; CHECK-NEXT: [[OR:%.*]] = or i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: call void @use(i32 [[OR]])
; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[X]], [[Y]]
; CHECK-NEXT: [[SUB:%.*]] = sub i32 0, [[TMP1]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%or = or i32 %x, %y
call void @use(i32 %or)
%and = and i32 %x, %y
%sub = sub i32 %and, %or
ret i32 %sub
}
define i32 @sub_to_xor_or_commuted(i32 %x, i32 %y) {
; CHECK-LABEL: @sub_to_xor_or_commuted(
; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = sub i32 0, [[TMP1]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%or = or i32 %y, %x
%and = and i32 %x, %y
%sub = sub i32 %and, %or
ret i32 %sub
}
define i32 @sub_to_xor_and_commuted(i32 %x, i32 %y) {
; CHECK-LABEL: @sub_to_xor_and_commuted(
; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = sub i32 0, [[TMP1]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%or = or i32 %x, %y
%and = and i32 %y, %x
%sub = sub i32 %and, %or
ret i32 %sub
}
define <2 x i32> @sub_to_xor_vec(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @sub_to_xor_vec(
; CHECK-NEXT: [[TMP1:%.*]] = xor <2 x i32> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = sub <2 x i32> zeroinitializer, [[TMP1]]
; CHECK-NEXT: ret <2 x i32> [[SUB]]
;
%or = or <2 x i32> %x, %y
%and = and <2 x i32> %y, %x
%sub = sub <2 x i32> %and, %or
ret <2 x i32> %sub
}
; Negative tests
define i32 @sub_to_xor_extra_use_and_or(i32 %x, i32 %y) {
; CHECK-LABEL: @sub_to_xor_extra_use_and_or(
; CHECK-NEXT: [[OR:%.*]] = or i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: call void @use(i32 [[OR]])
; CHECK-NEXT: [[AND:%.*]] = and i32 [[X]], [[Y]]
; CHECK-NEXT: call void @use(i32 [[AND]])
; CHECK-NEXT: [[SUB:%.*]] = sub i32 [[AND]], [[OR]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%or = or i32 %x, %y
call void @use(i32 %or)
%and = and i32 %x, %y
call void @use(i32 %and)
%sub = sub i32 %and, %or
ret i32 %sub
}