forked from OSchip/llvm-project
227 lines
6.5 KiB
LLVM
227 lines
6.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
|
|
; https://bugs.llvm.org/show_bug.cgi?id=38123
|
|
|
|
; Pattern:
|
|
; x u<= x & C
|
|
; Should be transformed into:
|
|
; x u<= C
|
|
; Iff: isPowerOf2(C + 1)
|
|
; C can be 0 and -1.
|
|
|
|
declare i8 @gen8()
|
|
declare <2 x i8> @gen2x8()
|
|
declare <3 x i8> @gen3x8()
|
|
|
|
; ============================================================================ ;
|
|
; Basic positive tests
|
|
; ============================================================================ ;
|
|
|
|
define i1 @p0() {
|
|
; CHECK-LABEL: @p0(
|
|
; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i8 [[X]], 4
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%x = call i8 @gen8()
|
|
%tmp0 = and i8 %x, 3
|
|
%ret = icmp ule i8 %x, %tmp0
|
|
ret i1 %ret
|
|
}
|
|
|
|
define i1 @pv(i8 %y) {
|
|
; CHECK-LABEL: @pv(
|
|
; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
|
|
; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ule i8 [[X]], [[TMP0]]
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%x = call i8 @gen8()
|
|
%tmp0 = lshr i8 -1, %y
|
|
%tmp1 = and i8 %tmp0, %x
|
|
%ret = icmp ule i8 %x, %tmp1
|
|
ret i1 %ret
|
|
}
|
|
|
|
; ============================================================================ ;
|
|
; Vector tests
|
|
; ============================================================================ ;
|
|
|
|
define <2 x i1> @p1_vec_splat() {
|
|
; CHECK-LABEL: @p1_vec_splat(
|
|
; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @gen2x8()
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult <2 x i8> [[X]], <i8 4, i8 4>
|
|
; CHECK-NEXT: ret <2 x i1> [[TMP1]]
|
|
;
|
|
%x = call <2 x i8> @gen2x8()
|
|
%tmp0 = and <2 x i8> %x, <i8 3, i8 3>
|
|
%ret = icmp ule <2 x i8> %x, %tmp0
|
|
ret <2 x i1> %ret
|
|
}
|
|
|
|
define <2 x i1> @p2_vec_nonsplat() {
|
|
; CHECK-LABEL: @p2_vec_nonsplat(
|
|
; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @gen2x8()
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult <2 x i8> [[X]], <i8 4, i8 16>
|
|
; CHECK-NEXT: ret <2 x i1> [[TMP1]]
|
|
;
|
|
%x = call <2 x i8> @gen2x8()
|
|
%tmp0 = and <2 x i8> %x, <i8 3, i8 15> ; doesn't have to be splat.
|
|
%ret = icmp ule <2 x i8> %x, %tmp0
|
|
ret <2 x i1> %ret
|
|
}
|
|
|
|
define <2 x i1> @p2_vec_nonsplat_edgecase0() {
|
|
; CHECK-LABEL: @p2_vec_nonsplat_edgecase0(
|
|
; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @gen2x8()
|
|
; CHECK-NEXT: [[TMP0:%.*]] = and <2 x i8> [[X]], <i8 3, i8 0>
|
|
; CHECK-NEXT: [[RET:%.*]] = icmp ule <2 x i8> [[X]], [[TMP0]]
|
|
; CHECK-NEXT: ret <2 x i1> [[RET]]
|
|
;
|
|
%x = call <2 x i8> @gen2x8()
|
|
%tmp0 = and <2 x i8> %x, <i8 3, i8 0>
|
|
%ret = icmp ule <2 x i8> %x, %tmp0
|
|
ret <2 x i1> %ret
|
|
}
|
|
define <2 x i1> @p2_vec_nonsplat_edgecase1() {
|
|
; CHECK-LABEL: @p2_vec_nonsplat_edgecase1(
|
|
; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @gen2x8()
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ule <2 x i8> [[X]], <i8 3, i8 -1>
|
|
; CHECK-NEXT: ret <2 x i1> [[TMP1]]
|
|
;
|
|
%x = call <2 x i8> @gen2x8()
|
|
%tmp0 = and <2 x i8> %x, <i8 3, i8 -1>
|
|
%ret = icmp ule <2 x i8> %x, %tmp0
|
|
ret <2 x i1> %ret
|
|
}
|
|
|
|
define <3 x i1> @p3_vec_splat_undef() {
|
|
; CHECK-LABEL: @p3_vec_splat_undef(
|
|
; CHECK-NEXT: [[X:%.*]] = call <3 x i8> @gen3x8()
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult <3 x i8> [[X]], <i8 4, i8 4, i8 4>
|
|
; CHECK-NEXT: ret <3 x i1> [[TMP1]]
|
|
;
|
|
%x = call <3 x i8> @gen3x8()
|
|
%tmp0 = and <3 x i8> %x, <i8 3, i8 undef, i8 3>
|
|
%ret = icmp ule <3 x i8> %x, %tmp0
|
|
ret <3 x i1> %ret
|
|
}
|
|
|
|
; ============================================================================ ;
|
|
; Commutativity tests.
|
|
; ============================================================================ ;
|
|
|
|
define i1 @c0(i8 %x) {
|
|
; CHECK-LABEL: @c0(
|
|
; CHECK-NEXT: ret i1 true
|
|
;
|
|
%tmp0 = and i8 %x, 3
|
|
%ret = icmp ule i8 %tmp0, %x ; swapped order
|
|
ret i1 %ret
|
|
}
|
|
|
|
; ============================================================================ ;
|
|
; Commutativity tests with variable
|
|
; ============================================================================ ;
|
|
|
|
define i1 @cv0(i8 %y) {
|
|
; CHECK-LABEL: @cv0(
|
|
; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
|
|
; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ule i8 [[X]], [[TMP0]]
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%x = call i8 @gen8()
|
|
%tmp0 = lshr i8 -1, %y
|
|
%tmp1 = and i8 %tmp0, %x ; swapped order
|
|
%ret = icmp ule i8 %x, %tmp1
|
|
ret i1 %ret
|
|
}
|
|
|
|
define i1 @cv1(i8 %y) {
|
|
; CHECK-LABEL: @cv1(
|
|
; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
|
|
; CHECK-NEXT: ret i1 true
|
|
;
|
|
%x = call i8 @gen8()
|
|
%tmp0 = lshr i8 -1, %y
|
|
%tmp1 = and i8 %x, %tmp0
|
|
%ret = icmp ule i8 %tmp1, %x ; swapped order
|
|
ret i1 %ret
|
|
}
|
|
|
|
define i1 @cv2(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @cv2(
|
|
; CHECK-NEXT: ret i1 true
|
|
;
|
|
%tmp0 = lshr i8 -1, %y
|
|
%tmp1 = and i8 %tmp0, %x ; swapped order
|
|
%ret = icmp ule i8 %tmp1, %x ; swapped order
|
|
ret i1 %ret
|
|
}
|
|
|
|
; ============================================================================ ;
|
|
; One-use tests. We don't care about multi-uses here.
|
|
; ============================================================================ ;
|
|
|
|
declare void @use8(i8)
|
|
|
|
define i1 @oneuse0() {
|
|
; CHECK-LABEL: @oneuse0(
|
|
; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
|
|
; CHECK-NEXT: [[TMP0:%.*]] = and i8 [[X]], 3
|
|
; CHECK-NEXT: call void @use8(i8 [[TMP0]])
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i8 [[X]], 4
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%x = call i8 @gen8()
|
|
%tmp0 = and i8 %x, 3
|
|
call void @use8(i8 %tmp0)
|
|
%ret = icmp ule i8 %x, %tmp0
|
|
ret i1 %ret
|
|
}
|
|
|
|
; ============================================================================ ;
|
|
; Negative tests
|
|
; ============================================================================ ;
|
|
|
|
define i1 @n0() {
|
|
; CHECK-LABEL: @n0(
|
|
; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
|
|
; CHECK-NEXT: [[TMP0:%.*]] = and i8 [[X]], 4
|
|
; CHECK-NEXT: [[RET:%.*]] = icmp ule i8 [[X]], [[TMP0]]
|
|
; CHECK-NEXT: ret i1 [[RET]]
|
|
;
|
|
%x = call i8 @gen8()
|
|
%tmp0 = and i8 %x, 4 ; power-of-two, but invalid.
|
|
%ret = icmp ule i8 %x, %tmp0
|
|
ret i1 %ret
|
|
}
|
|
|
|
define i1 @n1(i8 %y, i8 %notx) {
|
|
; CHECK-LABEL: @n1(
|
|
; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
|
|
; CHECK-NEXT: [[TMP0:%.*]] = and i8 [[X]], 3
|
|
; CHECK-NEXT: [[RET:%.*]] = icmp ule i8 [[TMP0]], [[NOTX:%.*]]
|
|
; CHECK-NEXT: ret i1 [[RET]]
|
|
;
|
|
%x = call i8 @gen8()
|
|
%tmp0 = and i8 %x, 3
|
|
%ret = icmp ule i8 %tmp0, %notx ; not %x
|
|
ret i1 %ret
|
|
}
|
|
|
|
define <2 x i1> @n2() {
|
|
; CHECK-LABEL: @n2(
|
|
; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @gen2x8()
|
|
; CHECK-NEXT: [[TMP0:%.*]] = and <2 x i8> [[X]], <i8 3, i8 16>
|
|
; CHECK-NEXT: [[RET:%.*]] = icmp ule <2 x i8> [[X]], [[TMP0]]
|
|
; CHECK-NEXT: ret <2 x i1> [[RET]]
|
|
;
|
|
%x = call <2 x i8> @gen2x8()
|
|
%tmp0 = and <2 x i8> %x, <i8 3, i8 16> ; only the first one is valid.
|
|
%ret = icmp ule <2 x i8> %x, %tmp0
|
|
ret <2 x i1> %ret
|
|
}
|