[InstCombine] add tests for bitwise logic; NFC

This commit is contained in:
Sanjay Patel 2022-08-06 14:22:12 -04:00
parent 6ea5bf436a
commit 2843a1d87d
1 changed files with 228 additions and 0 deletions

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@ -1,6 +1,8 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
declare void @use(i4)
; PR1510
; (a | b) & ~(a & b) --> a ^ b
@ -640,3 +642,229 @@ define i32 @xor_to_xnor4(float %fa, float %fb) {
%xor = xor i32 %or1, %or2
ret i32 %xor
}
define i4 @simplify_or_common_op_commute0(i4 %x, i4 %y, i4 %z) {
; CHECK-LABEL: @simplify_or_common_op_commute0(
; CHECK-NEXT: [[XY:%.*]] = and i4 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[XYZ:%.*]] = and i4 [[XY]], [[Z:%.*]]
; CHECK-NEXT: [[NOT_XYZ:%.*]] = xor i4 [[XYZ]], -1
; CHECK-NEXT: [[R:%.*]] = or i4 [[NOT_XYZ]], [[X]]
; CHECK-NEXT: ret i4 [[R]]
;
%xy = and i4 %x, %y
%xyz = and i4 %xy, %z
%not_xyz = xor i4 %xyz, -1
%r = or i4 %not_xyz, %x
ret i4 %r
}
define i4 @simplify_or_common_op_commute1(i4 %x, i4 %y, i4 %z) {
; CHECK-LABEL: @simplify_or_common_op_commute1(
; CHECK-NEXT: [[XY:%.*]] = and i4 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: [[XYZ:%.*]] = and i4 [[XY]], [[Z:%.*]]
; CHECK-NEXT: [[NOT_XYZ:%.*]] = xor i4 [[XYZ]], -1
; CHECK-NEXT: [[R:%.*]] = or i4 [[NOT_XYZ]], [[X]]
; CHECK-NEXT: ret i4 [[R]]
;
%xy = and i4 %y, %x
%xyz = and i4 %xy, %z
%not_xyz = xor i4 %xyz, -1
%r = or i4 %not_xyz, %x
ret i4 %r
}
define i4 @simplify_or_common_op_commute2(i4 %x, i4 %y, i4 %p, i4 %q) {
; CHECK-LABEL: @simplify_or_common_op_commute2(
; CHECK-NEXT: [[Z:%.*]] = mul i4 [[P:%.*]], [[P]]
; CHECK-NEXT: [[XY:%.*]] = and i4 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[XYZ:%.*]] = and i4 [[Z]], [[XY]]
; CHECK-NEXT: [[XYZQ:%.*]] = and i4 [[XYZ]], [[Q:%.*]]
; CHECK-NEXT: [[NOT_XYZQ:%.*]] = xor i4 [[XYZQ]], -1
; CHECK-NEXT: [[R:%.*]] = or i4 [[NOT_XYZQ]], [[X]]
; CHECK-NEXT: ret i4 [[R]]
;
%z = mul i4 %p, %p ; thwart complexity-based canonicalization
%xy = and i4 %x, %y
%xyz = and i4 %z, %xy
%xyzq = and i4 %xyz, %q
%not_xyzq = xor i4 %xyzq, -1
%r = or i4 %not_xyzq, %x
ret i4 %r
}
define <2 x i4> @simplify_or_common_op_commute3(<2 x i4> %x, <2 x i4> %y, <2 x i4> %p) {
; CHECK-LABEL: @simplify_or_common_op_commute3(
; CHECK-NEXT: [[Z:%.*]] = mul <2 x i4> [[P:%.*]], [[P]]
; CHECK-NEXT: [[XY:%.*]] = and <2 x i4> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: [[XYZ:%.*]] = and <2 x i4> [[Z]], [[XY]]
; CHECK-NEXT: [[NOT_XYZ:%.*]] = xor <2 x i4> [[XYZ]], <i4 -1, i4 -1>
; CHECK-NEXT: [[R:%.*]] = or <2 x i4> [[NOT_XYZ]], [[X]]
; CHECK-NEXT: ret <2 x i4> [[R]]
;
%z = mul <2 x i4> %p, %p ; thwart complexity-based canonicalization
%xy = and <2 x i4> %y, %x
%xyz = and <2 x i4> %z, %xy
%not_xyz = xor <2 x i4> %xyz, <i4 -1, i4 -1>
%r = or <2 x i4> %x, %not_xyz
ret <2 x i4> %r
}
define i4 @simplify_and_common_op_commute0(i4 %x, i4 %y, i4 %z) {
; CHECK-LABEL: @simplify_and_common_op_commute0(
; CHECK-NEXT: [[XY:%.*]] = or i4 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: call void @use(i4 [[X]])
; CHECK-NEXT: [[XYZ:%.*]] = or i4 [[XY]], [[Z:%.*]]
; CHECK-NEXT: [[NOT_XYZ:%.*]] = xor i4 [[XYZ]], -1
; CHECK-NEXT: [[R:%.*]] = and i4 [[NOT_XYZ]], [[X]]
; CHECK-NEXT: ret i4 [[R]]
;
%xy = or i4 %x, %y
call void @use(i4 %x)
%xyz = or i4 %xy, %z
%not_xyz = xor i4 %xyz, -1
%r = and i4 %not_xyz, %x
ret i4 %r
}
define i4 @simplify_and_common_op_commute1(i4 %x, i4 %y, i4 %z) {
; CHECK-LABEL: @simplify_and_common_op_commute1(
; CHECK-NEXT: [[XY:%.*]] = or i4 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: [[XYZ:%.*]] = or i4 [[XY]], [[Z:%.*]]
; CHECK-NEXT: [[NOT_XYZ:%.*]] = xor i4 [[XYZ]], -1
; CHECK-NEXT: [[R:%.*]] = and i4 [[NOT_XYZ]], [[X]]
; CHECK-NEXT: ret i4 [[R]]
;
%xy = or i4 %y, %x
%xyz = or i4 %xy, %z
%not_xyz = xor i4 %xyz, -1
%r = and i4 %not_xyz, %x
ret i4 %r
}
define i4 @simplify_and_common_op_commute2(i4 %x, i4 %y, i4 %p, i4 %q) {
; CHECK-LABEL: @simplify_and_common_op_commute2(
; CHECK-NEXT: [[Z:%.*]] = mul i4 [[P:%.*]], [[P]]
; CHECK-NEXT: [[XY:%.*]] = or i4 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[XYZ:%.*]] = or i4 [[Z]], [[XY]]
; CHECK-NEXT: [[XYZQ:%.*]] = or i4 [[XYZ]], [[Q:%.*]]
; CHECK-NEXT: [[NOT_XYZQ:%.*]] = xor i4 [[XYZQ]], -1
; CHECK-NEXT: [[R:%.*]] = and i4 [[NOT_XYZQ]], [[X]]
; CHECK-NEXT: ret i4 [[R]]
;
%z = mul i4 %p, %p ; thwart complexity-based canonicalization
%xy = or i4 %x, %y
%xyz = or i4 %z, %xy
%xyzq = or i4 %xyz, %q
%not_xyzq = xor i4 %xyzq, -1
%r = and i4 %not_xyzq, %x
ret i4 %r
}
define <2 x i4> @simplify_and_common_op_commute3(<2 x i4> %x, <2 x i4> %y, <2 x i4> %p) {
; CHECK-LABEL: @simplify_and_common_op_commute3(
; CHECK-NEXT: [[Z:%.*]] = mul <2 x i4> [[P:%.*]], [[P]]
; CHECK-NEXT: [[XY:%.*]] = or <2 x i4> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: [[XYZ:%.*]] = or <2 x i4> [[Z]], [[XY]]
; CHECK-NEXT: [[NOT_XYZ:%.*]] = xor <2 x i4> [[XYZ]], <i4 -1, i4 -1>
; CHECK-NEXT: [[R:%.*]] = and <2 x i4> [[NOT_XYZ]], [[X]]
; CHECK-NEXT: ret <2 x i4> [[R]]
;
%z = mul <2 x i4> %p, %p ; thwart complexity-based canonicalization
%xy = or <2 x i4> %y, %x
%xyz = or <2 x i4> %z, %xy
%not_xyz = xor <2 x i4> %xyz, <i4 -1, i4 -1>
%r = and <2 x i4> %x, %not_xyz
ret <2 x i4> %r
}
define i4 @simplify_and_common_op_use1(i4 %x, i4 %y, i4 %z) {
; CHECK-LABEL: @simplify_and_common_op_use1(
; CHECK-NEXT: [[XY:%.*]] = or i4 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: call void @use(i4 [[Y]])
; CHECK-NEXT: [[XYZ:%.*]] = or i4 [[XY]], [[Z:%.*]]
; CHECK-NEXT: [[NOT_XYZ:%.*]] = xor i4 [[XYZ]], -1
; CHECK-NEXT: [[R:%.*]] = and i4 [[NOT_XYZ]], [[X]]
; CHECK-NEXT: ret i4 [[R]]
;
%xy = or i4 %x, %y
call void @use(i4 %y)
%xyz = or i4 %xy, %z
%not_xyz = xor i4 %xyz, -1
%r = and i4 %not_xyz, %x
ret i4 %r
}
define i4 @simplify_and_common_op_use2(i4 %x, i4 %y, i4 %z) {
; CHECK-LABEL: @simplify_and_common_op_use2(
; CHECK-NEXT: [[XY:%.*]] = or i4 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[XYZ:%.*]] = or i4 [[XY]], [[Z:%.*]]
; CHECK-NEXT: call void @use(i4 [[Z]])
; CHECK-NEXT: [[NOT_XYZ:%.*]] = xor i4 [[XYZ]], -1
; CHECK-NEXT: [[R:%.*]] = and i4 [[NOT_XYZ]], [[X]]
; CHECK-NEXT: ret i4 [[R]]
;
%xy = or i4 %x, %y
%xyz = or i4 %xy, %z
call void @use(i4 %z)
%not_xyz = xor i4 %xyz, -1
%r = and i4 %not_xyz, %x
ret i4 %r
}
define i4 @reduce_xor_common_op_commute0(i4 %x, i4 %y, i4 %z) {
; CHECK-LABEL: @reduce_xor_common_op_commute0(
; CHECK-NEXT: [[XY:%.*]] = xor i4 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[XYZ:%.*]] = xor i4 [[XY]], [[Z:%.*]]
; CHECK-NEXT: [[R:%.*]] = or i4 [[XYZ]], [[X]]
; CHECK-NEXT: ret i4 [[R]]
;
%xy = xor i4 %x, %y
%xyz = xor i4 %xy, %z
%r = or i4 %xyz, %x
ret i4 %r
}
define i4 @reduce_xor_common_op_commute1(i4 %x, i4 %y, i4 %z) {
; CHECK-LABEL: @reduce_xor_common_op_commute1(
; CHECK-NEXT: [[XY:%.*]] = xor i4 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: [[XYZ:%.*]] = xor i4 [[XY]], [[Z:%.*]]
; CHECK-NEXT: [[R:%.*]] = or i4 [[XYZ]], [[X]]
; CHECK-NEXT: ret i4 [[R]]
;
%xy = xor i4 %y, %x
%xyz = xor i4 %xy, %z
%r = or i4 %xyz, %x
ret i4 %r
}
define i4 @annihilate_xor_common_op_commute2(i4 %x, i4 %y, i4 %p, i4 %q) {
; CHECK-LABEL: @annihilate_xor_common_op_commute2(
; CHECK-NEXT: [[Z:%.*]] = mul i4 [[P:%.*]], [[P]]
; CHECK-NEXT: [[XY:%.*]] = xor i4 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[XYZ:%.*]] = xor i4 [[Z]], [[XY]]
; CHECK-NEXT: [[XYZQ:%.*]] = xor i4 [[XYZ]], [[Q:%.*]]
; CHECK-NEXT: [[R:%.*]] = xor i4 [[XYZQ]], [[X]]
; CHECK-NEXT: ret i4 [[R]]
;
%z = mul i4 %p, %p ; thwart complexity-based canonicalization
%xy = xor i4 %x, %y
%xyz = xor i4 %z, %xy
%xyzq = xor i4 %xyz, %q
%r = xor i4 %xyzq, %x
ret i4 %r
}
define <2 x i4> @reduce_xor_common_op_commute3(<2 x i4> %x, <2 x i4> %y, <2 x i4> %p) {
; CHECK-LABEL: @reduce_xor_common_op_commute3(
; CHECK-NEXT: [[Z:%.*]] = mul <2 x i4> [[P:%.*]], [[P]]
; CHECK-NEXT: [[XY:%.*]] = xor <2 x i4> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: [[XYZ:%.*]] = xor <2 x i4> [[Z]], [[XY]]
; CHECK-NEXT: [[R:%.*]] = or <2 x i4> [[XYZ]], [[X]]
; CHECK-NEXT: ret <2 x i4> [[R]]
;
%z = mul <2 x i4> %p, %p ; thwart complexity-based canonicalization
%xy = xor <2 x i4> %y, %x
%xyz = xor <2 x i4> %z, %xy
%r = or <2 x i4> %x, %xyz
ret <2 x i4> %r
}