mirror of
https://github.com/RPCS3/llvm-mirror.git
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267 lines
5.4 KiB
LLVM
267 lines
5.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instsimplify -S | FileCheck %s
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define i32 @add1(i32 %x) {
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; CHECK-LABEL: @add1(
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; CHECK-NEXT: ret i32 [[X:%.*]]
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;
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; (X + -1) + 1 -> X
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%l = add i32 %x, -1
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%r = add i32 %l, 1
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ret i32 %r
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}
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define i32 @and1(i32 %x, i32 %y) {
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; CHECK-LABEL: @and1(
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; CHECK-NEXT: [[L:%.*]] = and i32 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: ret i32 [[L]]
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;
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; (X & Y) & X -> X & Y
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%l = and i32 %x, %y
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%r = and i32 %l, %x
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ret i32 %r
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}
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define i32 @and2(i32 %x, i32 %y) {
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; CHECK-LABEL: @and2(
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; CHECK-NEXT: [[R:%.*]] = and i32 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: ret i32 [[R]]
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;
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; X & (X & Y) -> X & Y
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%r = and i32 %x, %y
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%l = and i32 %x, %r
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ret i32 %l
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}
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define i32 @or1(i32 %x, i32 %y) {
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; CHECK-LABEL: @or1(
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; CHECK-NEXT: [[L:%.*]] = or i32 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: ret i32 [[L]]
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;
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; (X | Y) | X -> X | Y
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%l = or i32 %x, %y
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%r = or i32 %l, %x
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ret i32 %r
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}
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define i32 @or2(i32 %x, i32 %y) {
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; CHECK-LABEL: @or2(
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; CHECK-NEXT: [[R:%.*]] = or i32 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: ret i32 [[R]]
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;
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; X | (X | Y) -> X | Y
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%r = or i32 %x, %y
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%l = or i32 %x, %r
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ret i32 %l
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}
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define i32 @xor1(i32 %x, i32 %y) {
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; CHECK-LABEL: @xor1(
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; CHECK-NEXT: ret i32 [[Y:%.*]]
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;
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; (X ^ Y) ^ X = Y
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%l = xor i32 %x, %y
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%r = xor i32 %l, %x
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ret i32 %r
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}
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define i32 @xor2(i32 %x, i32 %y) {
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; CHECK-LABEL: @xor2(
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; CHECK-NEXT: ret i32 [[Y:%.*]]
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;
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; X ^ (X ^ Y) = Y
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%r = xor i32 %x, %y
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%l = xor i32 %x, %r
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ret i32 %l
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}
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define i32 @sub1(i32 %x, i32 %y) {
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; CHECK-LABEL: @sub1(
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; CHECK-NEXT: ret i32 [[Y:%.*]]
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;
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%d = sub i32 %x, %y
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%r = sub i32 %x, %d
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ret i32 %r
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}
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define i32 @sub2(i32 %x) {
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; CHECK-LABEL: @sub2(
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; CHECK-NEXT: ret i32 -1
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;
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; X - (X + 1) -> -1
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%xp1 = add i32 %x, 1
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%r = sub i32 %x, %xp1
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ret i32 %r
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}
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define i32 @sub3(i32 %x, i32 %y) {
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; CHECK-LABEL: @sub3(
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; CHECK-NEXT: ret i32 [[X:%.*]]
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;
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; ((X + 1) + Y) - (Y + 1) -> X
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%xp1 = add i32 %x, 1
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%lhs = add i32 %xp1, %y
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%rhs = add i32 %y, 1
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%r = sub i32 %lhs, %rhs
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ret i32 %r
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}
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; (no overflow X * Y) / Y -> X
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define i32 @mulnsw_sdiv(i32 %x, i32 %y) {
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; CHECK-LABEL: @mulnsw_sdiv(
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; CHECK-NEXT: ret i32 [[X:%.*]]
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;
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%mul = mul nsw i32 %x, %y
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%r = sdiv i32 %mul, %y
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ret i32 %r
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}
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define <2 x i32> @mulnsw_sdiv_commute(<2 x i32> %x, <2 x i32> %y) {
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; CHECK-LABEL: @mulnsw_sdiv_commute(
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; CHECK-NEXT: ret <2 x i32> [[X:%.*]]
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;
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%mul = mul nsw <2 x i32> %y, %x
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%r = sdiv <2 x i32> %mul, %y
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ret <2 x i32> %r
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}
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; (no overflow X * Y) / Y -> X
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define <2 x i8> @mulnuw_udiv(<2 x i8> %x, <2 x i8> %y) {
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; CHECK-LABEL: @mulnuw_udiv(
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; CHECK-NEXT: ret <2 x i8> [[X:%.*]]
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;
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%mul = mul nuw <2 x i8> %x, %y
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%r = udiv <2 x i8> %mul, %y
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ret <2 x i8> %r
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}
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define i32 @mulnuw_udiv_commute(i32 %x, i32 %y) {
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; CHECK-LABEL: @mulnuw_udiv_commute(
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; CHECK-NEXT: ret i32 [[X:%.*]]
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;
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%mul = mul nuw i32 %y, %x
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%r = udiv i32 %mul, %y
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ret i32 %r
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}
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; (((X / Y) * Y) / Y) -> X / Y
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define i32 @sdiv_mul_sdiv(i32 %x, i32 %y) {
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; CHECK-LABEL: @sdiv_mul_sdiv(
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: ret i32 [[DIV]]
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;
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%div = sdiv i32 %x, %y
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%mul = mul i32 %div, %y
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%r = sdiv i32 %mul, %y
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ret i32 %r
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}
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define i32 @sdiv_mul_sdiv_commute(i32 %x, i32 %y) {
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; CHECK-LABEL: @sdiv_mul_sdiv_commute(
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: ret i32 [[DIV]]
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;
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%div = sdiv i32 %x, %y
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%mul = mul i32 %y, %div
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%r = sdiv i32 %mul, %y
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ret i32 %r
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}
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; (((X / Y) * Y) / Y) -> X / Y
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define i32 @udiv_mul_udiv(i32 %x, i32 %y) {
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; CHECK-LABEL: @udiv_mul_udiv(
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; CHECK-NEXT: [[DIV:%.*]] = udiv i32 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: ret i32 [[DIV]]
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;
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%div = udiv i32 %x, %y
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%mul = mul i32 %div, %y
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%r = udiv i32 %mul, %y
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ret i32 %r
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}
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define i32 @udiv_mul_udiv_commute(i32 %x, i32 %y) {
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; CHECK-LABEL: @udiv_mul_udiv_commute(
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; CHECK-NEXT: [[DIV:%.*]] = udiv i32 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: ret i32 [[DIV]]
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;
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%div = udiv i32 %x, %y
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%mul = mul i32 %y, %div
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%r = udiv i32 %mul, %y
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ret i32 %r
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}
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define i32 @sdiv3(i32 %x, i32 %y) {
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; CHECK-LABEL: @sdiv3(
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; CHECK-NEXT: ret i32 0
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;
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; (X rem Y) / Y -> 0
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%rem = srem i32 %x, %y
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%div = sdiv i32 %rem, %y
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ret i32 %div
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}
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define i32 @sdiv4(i32 %x, i32 %y) {
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; CHECK-LABEL: @sdiv4(
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; CHECK-NEXT: ret i32 [[X:%.*]]
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;
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; (X / Y) * Y -> X if the division is exact
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%div = sdiv exact i32 %x, %y
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%mul = mul i32 %div, %y
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ret i32 %mul
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}
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define i32 @sdiv5(i32 %x, i32 %y) {
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; CHECK-LABEL: @sdiv5(
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; CHECK-NEXT: ret i32 [[X:%.*]]
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;
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; Y * (X / Y) -> X if the division is exact
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%div = sdiv exact i32 %x, %y
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%mul = mul i32 %y, %div
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ret i32 %mul
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}
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define i32 @udiv3(i32 %x, i32 %y) {
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; CHECK-LABEL: @udiv3(
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; CHECK-NEXT: ret i32 0
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;
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; (X rem Y) / Y -> 0
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%rem = urem i32 %x, %y
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%div = udiv i32 %rem, %y
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ret i32 %div
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}
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define i32 @udiv4(i32 %x, i32 %y) {
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; CHECK-LABEL: @udiv4(
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; CHECK-NEXT: ret i32 [[X:%.*]]
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;
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; (X / Y) * Y -> X if the division is exact
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%div = udiv exact i32 %x, %y
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%mul = mul i32 %div, %y
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ret i32 %mul
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}
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define i32 @udiv5(i32 %x, i32 %y) {
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; CHECK-LABEL: @udiv5(
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; CHECK-NEXT: ret i32 [[X:%.*]]
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;
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; Y * (X / Y) -> X if the division is exact
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%div = udiv exact i32 %x, %y
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%mul = mul i32 %y, %div
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ret i32 %mul
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}
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define i16 @trunc1(i32 %x) {
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; CHECK-LABEL: @trunc1(
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; CHECK-NEXT: ret i16 1
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;
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%y = add i32 %x, 1
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%tx = trunc i32 %x to i16
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%ty = trunc i32 %y to i16
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%d = sub i16 %ty, %tx
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ret i16 %d
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}
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