160 lines
3.9 KiB
LLVM
160 lines
3.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
|
|
; Tests for Integer BitWidth <= 64 && BitWidth % 8 != 0.
|
|
|
|
;; Flip sign bit then add INT_MIN -> nop.
|
|
define i1 @test1(i1 %x) {
|
|
; CHECK-LABEL: @test1(
|
|
; CHECK-NEXT: ret i1 %x
|
|
;
|
|
%tmp.2 = xor i1 %x, 1
|
|
%tmp.4 = add i1 %tmp.2, 1
|
|
ret i1 %tmp.4
|
|
}
|
|
|
|
;; Flip sign bit then add INT_MIN -> nop.
|
|
define i47 @test2(i47 %x) {
|
|
; CHECK-LABEL: @test2(
|
|
; CHECK-NEXT: ret i47 %x
|
|
;
|
|
%tmp.2 = xor i47 %x, 70368744177664
|
|
%tmp.4 = add i47 %tmp.2, 70368744177664
|
|
ret i47 %tmp.4
|
|
}
|
|
|
|
;; Flip sign bit then add INT_MIN -> nop.
|
|
define i15 @test3(i15 %x) {
|
|
; CHECK-LABEL: @test3(
|
|
; CHECK-NEXT: ret i15 %x
|
|
;
|
|
%tmp.2 = xor i15 %x, 16384
|
|
%tmp.4 = add i15 %tmp.2, 16384
|
|
ret i15 %tmp.4
|
|
}
|
|
|
|
; X + signbit --> X ^ signbit
|
|
define <2 x i5> @test3vec(<2 x i5> %x) {
|
|
; CHECK-LABEL: @test3vec(
|
|
; CHECK-NEXT: [[Y:%.*]] = xor <2 x i5> %x, <i5 -16, i5 -16>
|
|
; CHECK-NEXT: ret <2 x i5> [[Y]]
|
|
;
|
|
%y = add <2 x i5> %x, <i5 16, i5 16>
|
|
ret <2 x i5> %y
|
|
}
|
|
|
|
;; (x & 0b1111..0) + 1 -> x | 1
|
|
define i49 @test4(i49 %x) {
|
|
; CHECK-LABEL: @test4(
|
|
; CHECK-NEXT: [[TMP_4:%.*]] = or i49 %x, 1
|
|
; CHECK-NEXT: ret i49 [[TMP_4]]
|
|
;
|
|
%tmp.2 = and i49 %x, 562949953421310
|
|
%tmp.4 = add i49 %tmp.2, 1
|
|
ret i49 %tmp.4
|
|
}
|
|
|
|
define i7 @sext(i4 %x) {
|
|
; CHECK-LABEL: @sext(
|
|
; CHECK-NEXT: [[ADD:%.*]] = sext i4 %x to i7
|
|
; CHECK-NEXT: ret i7 [[ADD]]
|
|
;
|
|
%xor = xor i4 %x, -8
|
|
%zext = zext i4 %xor to i7
|
|
%add = add nsw i7 %zext, -8
|
|
ret i7 %add
|
|
}
|
|
|
|
define <2 x i10> @sext_vec(<2 x i3> %x) {
|
|
; CHECK-LABEL: @sext_vec(
|
|
; CHECK-NEXT: [[ADD:%.*]] = sext <2 x i3> %x to <2 x i10>
|
|
; CHECK-NEXT: ret <2 x i10> [[ADD]]
|
|
;
|
|
%xor = xor <2 x i3> %x, <i3 -4, i3 -4>
|
|
%zext = zext <2 x i3> %xor to <2 x i10>
|
|
%add = add nsw <2 x i10> %zext, <i10 -4, i10 -4>
|
|
ret <2 x i10> %add
|
|
}
|
|
|
|
; Multiple uses of the operands don't prevent the fold.
|
|
|
|
define i4 @sext_multiuse(i4 %x) {
|
|
; CHECK-LABEL: @sext_multiuse(
|
|
; CHECK-NEXT: [[XOR:%.*]] = xor i4 %x, -8
|
|
; CHECK-NEXT: [[ZEXT:%.*]] = zext i4 [[XOR]] to i7
|
|
; CHECK-NEXT: [[ADD:%.*]] = sext i4 %x to i7
|
|
; CHECK-NEXT: [[MUL:%.*]] = sdiv i7 [[ZEXT]], [[ADD]]
|
|
; CHECK-NEXT: [[TRUNC:%.*]] = trunc i7 [[MUL]] to i4
|
|
; CHECK-NEXT: [[DIV:%.*]] = sdiv i4 [[TRUNC]], [[XOR]]
|
|
; CHECK-NEXT: ret i4 [[DIV]]
|
|
;
|
|
%xor = xor i4 %x, -8
|
|
%zext = zext i4 %xor to i7
|
|
%add = add nsw i7 %zext, -8
|
|
%mul = sdiv i7 %zext, %add
|
|
%trunc = trunc i7 %mul to i4
|
|
%div = sdiv i4 %trunc, %xor
|
|
ret i4 %div
|
|
}
|
|
|
|
; Tests for Integer BitWidth > 64 && BitWidth <= 1024.
|
|
|
|
;; Flip sign bit then add INT_MIN -> nop.
|
|
define i111 @test5(i111 %x) {
|
|
; CHECK-LABEL: @test5(
|
|
; CHECK-NEXT: ret i111 %x
|
|
;
|
|
%tmp.2 = shl i111 1, 110
|
|
%tmp.4 = xor i111 %x, %tmp.2
|
|
%tmp.6 = add i111 %tmp.4, %tmp.2
|
|
ret i111 %tmp.6
|
|
}
|
|
|
|
;; Flip sign bit then add INT_MIN -> nop.
|
|
define i65 @test6(i65 %x) {
|
|
; CHECK-LABEL: @test6(
|
|
; CHECK-NEXT: ret i65 %x
|
|
;
|
|
%tmp.0 = shl i65 1, 64
|
|
%tmp.2 = xor i65 %x, %tmp.0
|
|
%tmp.4 = add i65 %tmp.2, %tmp.0
|
|
ret i65 %tmp.4
|
|
}
|
|
|
|
;; Flip sign bit then add INT_MIN -> nop.
|
|
define i1024 @test7(i1024 %x) {
|
|
; CHECK-LABEL: @test7(
|
|
; CHECK-NEXT: ret i1024 %x
|
|
;
|
|
%tmp.0 = shl i1024 1, 1023
|
|
%tmp.2 = xor i1024 %x, %tmp.0
|
|
%tmp.4 = add i1024 %tmp.2, %tmp.0
|
|
ret i1024 %tmp.4
|
|
}
|
|
|
|
;; If we have add(xor(X, 0xF..F80..), 0x80..), it's an xor.
|
|
define i128 @test8(i128 %x) {
|
|
; CHECK-LABEL: @test8(
|
|
; CHECK-NEXT: [[TMP_4:%.*]] = xor i128 %x, 170141183460469231731687303715884105600
|
|
; CHECK-NEXT: ret i128 [[TMP_4]]
|
|
;
|
|
%tmp.5 = shl i128 1, 127
|
|
%tmp.1 = ashr i128 %tmp.5, 120
|
|
%tmp.2 = xor i128 %x, %tmp.1
|
|
%tmp.4 = add i128 %tmp.2, %tmp.5
|
|
ret i128 %tmp.4
|
|
}
|
|
|
|
;; (x & 254)+1 -> (x & 254)|1
|
|
define i77 @test9(i77 %x) {
|
|
; CHECK-LABEL: @test9(
|
|
; CHECK-NEXT: [[TMP_2:%.*]] = and i77 %x, 562949953421310
|
|
; CHECK-NEXT: [[TMP_4:%.*]] = or i77 [[TMP_2]], 1
|
|
; CHECK-NEXT: ret i77 [[TMP_4]]
|
|
;
|
|
%tmp.2 = and i77 %x, 562949953421310
|
|
%tmp.4 = add i77 %tmp.2, 1
|
|
ret i77 %tmp.4
|
|
}
|
|
|