forked from OSchip/llvm-project
361 lines
13 KiB
LLVM
361 lines
13 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -instcombine < %s | FileCheck %s
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define <2 x i32> @umin_of_nots(<2 x i32> %x, <2 x i32> %y) {
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; CHECK-LABEL: @umin_of_nots(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ult <2 x i32> [[Y:%.*]], [[X:%.*]]
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; CHECK-NEXT: [[TMP2:%.*]] = select <2 x i1> [[TMP1]], <2 x i32> [[X]], <2 x i32> [[Y]]
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; CHECK-NEXT: [[MIN:%.*]] = xor <2 x i32> [[TMP2]], <i32 -1, i32 -1>
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; CHECK-NEXT: ret <2 x i32> [[MIN]]
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;
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%notx = xor <2 x i32> %x, <i32 -1, i32 -1>
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%noty = xor <2 x i32> %y, <i32 -1, i32 -1>
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%cmp = icmp ult <2 x i32> %notx, %noty
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%min = select <2 x i1> %cmp, <2 x i32> %notx, <2 x i32> %noty
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ret <2 x i32> %min
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}
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define <2 x i32> @smin_of_nots(<2 x i32> %x, <2 x i32> %y) {
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; CHECK-LABEL: @smin_of_nots(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp slt <2 x i32> [[Y:%.*]], [[X:%.*]]
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; CHECK-NEXT: [[TMP2:%.*]] = select <2 x i1> [[TMP1]], <2 x i32> [[X]], <2 x i32> [[Y]]
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; CHECK-NEXT: [[MIN:%.*]] = xor <2 x i32> [[TMP2]], <i32 -1, i32 -1>
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; CHECK-NEXT: ret <2 x i32> [[MIN]]
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;
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%notx = xor <2 x i32> %x, <i32 -1, i32 -1>
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%noty = xor <2 x i32> %y, <i32 -1, i32 -1>
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%cmp = icmp sle <2 x i32> %notx, %noty
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%min = select <2 x i1> %cmp, <2 x i32> %notx, <2 x i32> %noty
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ret <2 x i32> %min
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}
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define i32 @compute_min_2(i32 %x, i32 %y) {
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; CHECK-LABEL: @compute_min_2(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[Y:%.*]], [[X:%.*]]
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; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 [[Y]]
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; CHECK-NEXT: ret i32 [[TMP2]]
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;
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%not_x = sub i32 -1, %x
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%not_y = sub i32 -1, %y
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%cmp = icmp sgt i32 %not_x, %not_y
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%not_min = select i1 %cmp, i32 %not_x, i32 %not_y
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%min = sub i32 -1, %not_min
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ret i32 %min
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}
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declare void @extra_use(i8)
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define i8 @umin_not_1_extra_use(i8 %x, i8 %y) {
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; CHECK-LABEL: @umin_not_1_extra_use(
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; CHECK-NEXT: [[NX:%.*]] = xor i8 [[X:%.*]], -1
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i8 [[X]], [[Y:%.*]]
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; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i8 [[Y]], i8 [[X]]
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; CHECK-NEXT: [[MINXY:%.*]] = xor i8 [[TMP2]], -1
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; CHECK-NEXT: call void @extra_use(i8 [[NX]])
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; CHECK-NEXT: ret i8 [[MINXY]]
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;
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%nx = xor i8 %x, -1
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%ny = xor i8 %y, -1
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%cmpxy = icmp ult i8 %nx, %ny
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%minxy = select i1 %cmpxy, i8 %nx, i8 %ny
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call void @extra_use(i8 %nx)
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ret i8 %minxy
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}
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define i8 @umin_not_2_extra_use(i8 %x, i8 %y) {
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; CHECK-LABEL: @umin_not_2_extra_use(
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; CHECK-NEXT: [[NX:%.*]] = xor i8 [[X:%.*]], -1
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; CHECK-NEXT: [[NY:%.*]] = xor i8 [[Y:%.*]], -1
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; CHECK-NEXT: [[CMPXY:%.*]] = icmp ult i8 [[NX]], [[NY]]
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; CHECK-NEXT: [[MINXY:%.*]] = select i1 [[CMPXY]], i8 [[NX]], i8 [[NY]]
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; CHECK-NEXT: call void @extra_use(i8 [[NX]])
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; CHECK-NEXT: call void @extra_use(i8 [[NY]])
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; CHECK-NEXT: ret i8 [[MINXY]]
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;
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%nx = xor i8 %x, -1
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%ny = xor i8 %y, -1
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%cmpxy = icmp ult i8 %nx, %ny
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%minxy = select i1 %cmpxy, i8 %nx, i8 %ny
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call void @extra_use(i8 %nx)
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call void @extra_use(i8 %ny)
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ret i8 %minxy
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}
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; PR35834 - https://bugs.llvm.org/show_bug.cgi?id=35834
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define i8 @umin3_not(i8 %x, i8 %y, i8 %z) {
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; CHECK-LABEL: @umin3_not(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i8 [[Z:%.*]], [[X:%.*]]
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; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i8 [[X]], i8 [[Z]]
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; CHECK-NEXT: [[TMP3:%.*]] = icmp ugt i8 [[TMP2]], [[Y:%.*]]
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; CHECK-NEXT: [[R_V:%.*]] = select i1 [[TMP3]], i8 [[TMP2]], i8 [[Y]]
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; CHECK-NEXT: [[R:%.*]] = xor i8 [[R_V]], -1
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; CHECK-NEXT: ret i8 [[R]]
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;
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%nx = xor i8 %x, -1
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%ny = xor i8 %y, -1
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%nz = xor i8 %z, -1
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%cmpyx = icmp ult i8 %y, %x
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%cmpxz = icmp ult i8 %nx, %nz
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%minxz = select i1 %cmpxz, i8 %nx, i8 %nz
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%cmpyz = icmp ult i8 %ny, %nz
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%minyz = select i1 %cmpyz, i8 %ny, i8 %nz
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%r = select i1 %cmpyx, i8 %minxz, i8 %minyz
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ret i8 %r
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}
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; PR35875 - https://bugs.llvm.org/show_bug.cgi?id=35875
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define i8 @umin3_not_more_uses(i8 %x, i8 %y, i8 %z) {
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; CHECK-LABEL: @umin3_not_more_uses(
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; CHECK-NEXT: [[NX:%.*]] = xor i8 [[X:%.*]], -1
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; CHECK-NEXT: [[NY:%.*]] = xor i8 [[Y:%.*]], -1
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i8 [[X]], [[Z:%.*]]
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; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i8 [[Z]], i8 [[X]]
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; CHECK-NEXT: [[TMP3:%.*]] = icmp ugt i8 [[TMP2]], [[Y]]
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; CHECK-NEXT: [[TMP4:%.*]] = select i1 [[TMP3]], i8 [[TMP2]], i8 [[Y]]
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; CHECK-NEXT: [[R:%.*]] = xor i8 [[TMP4]], -1
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; CHECK-NEXT: call void @extra_use(i8 [[NX]])
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; CHECK-NEXT: call void @extra_use(i8 [[NY]])
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; CHECK-NEXT: ret i8 [[R]]
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;
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%nx = xor i8 %x, -1
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%ny = xor i8 %y, -1
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%nz = xor i8 %z, -1
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%cmpxz = icmp ult i8 %nx, %nz
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%minxz = select i1 %cmpxz, i8 %nx, i8 %nz
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%cmpyz = icmp ult i8 %ny, %nz
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%minyz = select i1 %cmpyz, i8 %ny, i8 %nz
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%cmpyx = icmp ult i8 %y, %x
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%r = select i1 %cmpyx, i8 %minxz, i8 %minyz
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call void @extra_use(i8 %nx)
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call void @extra_use(i8 %ny)
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ret i8 %r
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}
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declare void @use8(i8)
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define i8 @umin3_not_all_ops_extra_uses(i8 %x, i8 %y, i8 %z) {
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; CHECK-LABEL: @umin3_not_all_ops_extra_uses(
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; CHECK-NEXT: [[XN:%.*]] = xor i8 [[X:%.*]], -1
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; CHECK-NEXT: [[YN:%.*]] = xor i8 [[Y:%.*]], -1
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; CHECK-NEXT: [[ZN:%.*]] = xor i8 [[Z:%.*]], -1
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; CHECK-NEXT: [[CMPXZ:%.*]] = icmp ult i8 [[XN]], [[ZN]]
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; CHECK-NEXT: [[MINXZ:%.*]] = select i1 [[CMPXZ]], i8 [[XN]], i8 [[ZN]]
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; CHECK-NEXT: [[CMPXYZ:%.*]] = icmp ult i8 [[MINXZ]], [[YN]]
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; CHECK-NEXT: [[MINXYZ:%.*]] = select i1 [[CMPXYZ]], i8 [[MINXZ]], i8 [[YN]]
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; CHECK-NEXT: call void @use8(i8 [[XN]])
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; CHECK-NEXT: call void @use8(i8 [[YN]])
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; CHECK-NEXT: call void @use8(i8 [[ZN]])
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; CHECK-NEXT: ret i8 [[MINXYZ]]
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;
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%xn = xor i8 %x, -1
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%yn = xor i8 %y, -1
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%zn = xor i8 %z, -1
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%cmpxz = icmp ult i8 %xn, %zn
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%minxz = select i1 %cmpxz, i8 %xn, i8 %zn
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%cmpxyz = icmp ult i8 %minxz, %yn
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%minxyz = select i1 %cmpxyz, i8 %minxz, i8 %yn
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call void @use8(i8 %xn)
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call void @use8(i8 %yn)
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call void @use8(i8 %zn)
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ret i8 %minxyz
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}
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define i32 @compute_min_3(i32 %x, i32 %y, i32 %z) {
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; CHECK-LABEL: @compute_min_3(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[Y:%.*]], [[X:%.*]]
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; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 [[Y]]
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; CHECK-NEXT: [[TMP3:%.*]] = icmp slt i32 [[TMP2]], [[Z:%.*]]
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; CHECK-NEXT: [[TMP4:%.*]] = select i1 [[TMP3]], i32 [[TMP2]], i32 [[Z]]
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; CHECK-NEXT: ret i32 [[TMP4]]
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;
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%not_x = sub i32 -1, %x
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%not_y = sub i32 -1, %y
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%not_z = sub i32 -1, %z
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%cmp_1 = icmp sgt i32 %not_x, %not_y
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%not_min_1 = select i1 %cmp_1, i32 %not_x, i32 %not_y
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%cmp_2 = icmp sgt i32 %not_min_1, %not_z
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%not_min_2 = select i1 %cmp_2, i32 %not_min_1, i32 %not_z
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%min = sub i32 -1, %not_min_2
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ret i32 %min
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}
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; Don't increase the critical path by moving the 'not' op after the 'select'.
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define i32 @compute_min_arithmetic(i32 %x, i32 %y) {
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; CHECK-LABEL: @compute_min_arithmetic(
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; CHECK-NEXT: [[NOT_VALUE:%.*]] = sub i32 3, [[X:%.*]]
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; CHECK-NEXT: [[NOT_Y:%.*]] = xor i32 [[Y:%.*]], -1
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[NOT_VALUE]], [[NOT_Y]]
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; CHECK-NEXT: [[NOT_MIN:%.*]] = select i1 [[CMP]], i32 [[NOT_VALUE]], i32 [[NOT_Y]]
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; CHECK-NEXT: ret i32 [[NOT_MIN]]
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;
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%not_value = sub i32 3, %x
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%not_y = sub i32 -1, %y
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%cmp = icmp sgt i32 %not_value, %not_y
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%not_min = select i1 %cmp, i32 %not_value, i32 %not_y
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ret i32 %not_min
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}
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declare void @fake_use(i32)
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define i32 @compute_min_pessimization(i32 %x, i32 %y) {
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; CHECK-LABEL: @compute_min_pessimization(
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; CHECK-NEXT: [[NOT_VALUE:%.*]] = sub i32 3, [[X:%.*]]
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; CHECK-NEXT: call void @fake_use(i32 [[NOT_VALUE]])
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; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[X]], -4
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; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i32 [[TMP1]], [[Y:%.*]]
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; CHECK-NEXT: [[MIN:%.*]] = select i1 [[TMP2]], i32 [[TMP1]], i32 [[Y]]
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; CHECK-NEXT: ret i32 [[MIN]]
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;
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%not_value = sub i32 3, %x
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call void @fake_use(i32 %not_value)
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%not_y = sub i32 -1, %y
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%cmp = icmp sgt i32 %not_value, %not_y
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%not_min = select i1 %cmp, i32 %not_value, i32 %not_y
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%min = sub i32 -1, %not_min
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ret i32 %min
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}
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define i32 @max_of_nots(i32 %x, i32 %y) {
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; CHECK-LABEL: @max_of_nots(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[Y:%.*]], 0
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; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[Y]], i32 0
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; CHECK-NEXT: [[TMP3:%.*]] = icmp slt i32 [[TMP2]], [[X:%.*]]
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; CHECK-NEXT: [[TMP4:%.*]] = select i1 [[TMP3]], i32 [[TMP2]], i32 [[X]]
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; CHECK-NEXT: [[TMP5:%.*]] = xor i32 [[TMP4]], -1
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; CHECK-NEXT: ret i32 [[TMP5]]
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;
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%c0 = icmp sgt i32 %y, 0
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%xor_y = xor i32 %y, -1
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%s0 = select i1 %c0, i32 %xor_y, i32 -1
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%xor_x = xor i32 %x, -1
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%c1 = icmp slt i32 %s0, %xor_x
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%smax96 = select i1 %c1, i32 %xor_x, i32 %s0
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ret i32 %smax96
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}
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; negative test case (i.e. can not simplify) : ABS(MIN(NOT x,y))
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define i32 @abs_of_min_of_not(i32 %x, i32 %y) {
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; CHECK-LABEL: @abs_of_min_of_not(
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; CHECK-NEXT: [[XORD:%.*]] = xor i32 [[X:%.*]], -1
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; CHECK-NEXT: [[YADD:%.*]] = add i32 [[Y:%.*]], 2
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; CHECK-NEXT: [[COND_I:%.*]] = icmp slt i32 [[YADD]], [[XORD]]
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; CHECK-NEXT: [[MIN:%.*]] = select i1 [[COND_I]], i32 [[YADD]], i32 [[XORD]]
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; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[MIN]], 0
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; CHECK-NEXT: [[SUB:%.*]] = sub i32 0, [[MIN]]
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; CHECK-NEXT: [[ABS:%.*]] = select i1 [[CMP2]], i32 [[SUB]], i32 [[MIN]]
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; CHECK-NEXT: ret i32 [[ABS]]
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;
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%xord = xor i32 %x, -1
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%yadd = add i32 %y, 2
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%cond.i = icmp sge i32 %yadd, %xord
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%min = select i1 %cond.i, i32 %xord, i32 %yadd
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%cmp2 = icmp sgt i32 %min, -1
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%sub = sub i32 0, %min
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%abs = select i1 %cmp2, i32 %min, i32 %sub
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ret i32 %abs
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}
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define <2 x i32> @max_of_nots_vec(<2 x i32> %x, <2 x i32> %y) {
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; CHECK-LABEL: @max_of_nots_vec(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt <2 x i32> [[Y:%.*]], zeroinitializer
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; CHECK-NEXT: [[TMP2:%.*]] = select <2 x i1> [[TMP1]], <2 x i32> [[Y]], <2 x i32> zeroinitializer
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; CHECK-NEXT: [[TMP3:%.*]] = icmp slt <2 x i32> [[TMP2]], [[X:%.*]]
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; CHECK-NEXT: [[TMP4:%.*]] = select <2 x i1> [[TMP3]], <2 x i32> [[TMP2]], <2 x i32> [[X]]
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; CHECK-NEXT: [[TMP5:%.*]] = xor <2 x i32> [[TMP4]], <i32 -1, i32 -1>
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; CHECK-NEXT: ret <2 x i32> [[TMP5]]
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;
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%c0 = icmp sgt <2 x i32> %y, zeroinitializer
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%xor_y = xor <2 x i32> %y, <i32 -1, i32 -1>
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%s0 = select <2 x i1> %c0, <2 x i32> %xor_y, <2 x i32> <i32 -1, i32 -1>
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%xor_x = xor <2 x i32> %x, <i32 -1, i32 -1>
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%c1 = icmp slt <2 x i32> %s0, %xor_x
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%smax96 = select <2 x i1> %c1, <2 x i32> %xor_x, <2 x i32> %s0
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ret <2 x i32> %smax96
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}
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define <2 x i37> @max_of_nots_weird_type_vec(<2 x i37> %x, <2 x i37> %y) {
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; CHECK-LABEL: @max_of_nots_weird_type_vec(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt <2 x i37> [[Y:%.*]], zeroinitializer
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; CHECK-NEXT: [[TMP2:%.*]] = select <2 x i1> [[TMP1]], <2 x i37> [[Y]], <2 x i37> zeroinitializer
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; CHECK-NEXT: [[TMP3:%.*]] = icmp slt <2 x i37> [[TMP2]], [[X:%.*]]
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; CHECK-NEXT: [[TMP4:%.*]] = select <2 x i1> [[TMP3]], <2 x i37> [[TMP2]], <2 x i37> [[X]]
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; CHECK-NEXT: [[TMP5:%.*]] = xor <2 x i37> [[TMP4]], <i37 -1, i37 -1>
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; CHECK-NEXT: ret <2 x i37> [[TMP5]]
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;
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%c0 = icmp sgt <2 x i37> %y, zeroinitializer
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%xor_y = xor <2 x i37> %y, <i37 -1, i37 -1>
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%s0 = select <2 x i1> %c0, <2 x i37> %xor_y, <2 x i37> <i37 -1, i37 -1>
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%xor_x = xor <2 x i37> %x, <i37 -1, i37 -1>
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%c1 = icmp slt <2 x i37> %s0, %xor_x
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%smax96 = select <2 x i1> %c1, <2 x i37> %xor_x, <2 x i37> %s0
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ret <2 x i37> %smax96
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}
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; max(min(%a, -1), -1) == -1
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define i32 @max_of_min(i32 %a) {
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; CHECK-LABEL: @max_of_min(
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; CHECK-NEXT: ret i32 -1
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;
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%not_a = xor i32 %a, -1
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%c0 = icmp sgt i32 %a, 0
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%s0 = select i1 %c0, i32 %not_a, i32 -1
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%c1 = icmp sgt i32 %s0, -1
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%s1 = select i1 %c1, i32 %s0, i32 -1
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ret i32 %s1
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}
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; max(min(%a, -1), -1) == -1 (swap predicate and select ops)
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define i32 @max_of_min_swap(i32 %a) {
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; CHECK-LABEL: @max_of_min_swap(
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; CHECK-NEXT: ret i32 -1
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;
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%not_a = xor i32 %a, -1
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%c0 = icmp slt i32 %a, 0
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%s0 = select i1 %c0, i32 -1, i32 %not_a
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%c1 = icmp sgt i32 %s0, -1
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%s1 = select i1 %c1, i32 %s0, i32 -1
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ret i32 %s1
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}
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; min(max(%a, -1), -1) == -1
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define i32 @min_of_max(i32 %a) {
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; CHECK-LABEL: @min_of_max(
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; CHECK-NEXT: ret i32 -1
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;
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%not_a = xor i32 %a, -1
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%c0 = icmp slt i32 %a, 0
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%s0 = select i1 %c0, i32 %not_a, i32 -1
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%c1 = icmp slt i32 %s0, -1
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%s1 = select i1 %c1, i32 %s0, i32 -1
|
|
ret i32 %s1
|
|
}
|
|
|
|
; min(max(%a, -1), -1) == -1 (swap predicate and select ops)
|
|
define i32 @min_of_max_swap(i32 %a) {
|
|
; CHECK-LABEL: @min_of_max_swap(
|
|
; CHECK-NEXT: ret i32 -1
|
|
;
|
|
%not_a = xor i32 %a, -1
|
|
%c0 = icmp sgt i32 %a, 0
|
|
%s0 = select i1 %c0, i32 -1, i32 %not_a
|
|
%c1 = icmp slt i32 %s0, -1
|
|
%s1 = select i1 %c1, i32 %s0, i32 -1
|
|
ret i32 %s1
|
|
}
|
|
|
|
define <2 x i32> @max_of_min_vec(<2 x i32> %a) {
|
|
; CHECK-LABEL: @max_of_min_vec(
|
|
; CHECK-NEXT: ret <2 x i32> <i32 -1, i32 -1>
|
|
;
|
|
%not_a = xor <2 x i32> %a, <i32 -1, i32 -1>
|
|
%c0 = icmp sgt <2 x i32> %a, zeroinitializer
|
|
%s0 = select <2 x i1> %c0, <2 x i32> %not_a, <2 x i32> <i32 -1, i32 -1>
|
|
%c1 = icmp sgt <2 x i32> %s0, <i32 -1, i32 -1>
|
|
%s1 = select <2 x i1> %c1, <2 x i32> %s0, <2 x i32> <i32 -1, i32 -1>
|
|
ret <2 x i32> %s1
|
|
}
|
|
|