1048 lines
29 KiB
LLVM
1048 lines
29 KiB
LLVM
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; This test makes sure that div instructions are properly eliminated.
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; RUN: opt < %s -instcombine -S | FileCheck %s
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define i32 @test1(i32 %A) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: ret i32 [[A:%.*]]
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;
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%B = sdiv i32 %A, 1
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ret i32 %B
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}
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define i32 @test2(i32 %A) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[B:%.*]] = lshr i32 [[A:%.*]], 3
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; CHECK-NEXT: ret i32 [[B]]
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;
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%B = udiv i32 %A, 8
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ret i32 %B
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}
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define i32 @sdiv_by_minus1(i32 %A) {
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; CHECK-LABEL: @sdiv_by_minus1(
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; CHECK-NEXT: [[B:%.*]] = sub i32 0, [[A:%.*]]
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; CHECK-NEXT: ret i32 [[B]]
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;
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%B = sdiv i32 %A, -1
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ret i32 %B
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}
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define <2 x i64> @sdiv_by_minus1_vec(<2 x i64> %x) {
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; CHECK-LABEL: @sdiv_by_minus1_vec(
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; CHECK-NEXT: [[DIV:%.*]] = sub <2 x i64> zeroinitializer, [[X:%.*]]
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; CHECK-NEXT: ret <2 x i64> [[DIV]]
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;
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%div = sdiv <2 x i64> %x, <i64 -1, i64 -1>
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ret <2 x i64> %div
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}
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define <2 x i64> @sdiv_by_minus1_vec_undef_elt(<2 x i64> %x) {
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; CHECK-LABEL: @sdiv_by_minus1_vec_undef_elt(
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; CHECK-NEXT: ret <2 x i64> poison
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;
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%div = sdiv <2 x i64> %x, <i64 -1, i64 undef>
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ret <2 x i64> %div
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}
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define i32 @sdiv_by_sext_minus1(i1 %x, i32 %y) {
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; CHECK-LABEL: @sdiv_by_sext_minus1(
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; CHECK-NEXT: [[DIV:%.*]] = sub i32 0, [[Y:%.*]]
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; CHECK-NEXT: ret i32 [[DIV]]
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;
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%sext = sext i1 %x to i32
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%div = sdiv i32 %y, %sext
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ret i32 %div
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}
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define <2 x i32> @sdiv_by_sext_minus1_vec(<2 x i1> %x, <2 x i32> %y) {
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; CHECK-LABEL: @sdiv_by_sext_minus1_vec(
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; CHECK-NEXT: [[DIV:%.*]] = sub <2 x i32> zeroinitializer, [[Y:%.*]]
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; CHECK-NEXT: ret <2 x i32> [[DIV]]
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;
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%sext = sext <2 x i1> %x to <2 x i32>
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%div = sdiv <2 x i32> %y, %sext
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ret <2 x i32> %div
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}
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define i8 @udiv_by_negative(i8 %x) {
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; CHECK-LABEL: @udiv_by_negative(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[X:%.*]], -7
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; CHECK-NEXT: [[A:%.*]] = zext i1 [[TMP1]] to i8
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; CHECK-NEXT: ret i8 [[A]]
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;
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%A = udiv i8 %x, 250
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ret i8 %A
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}
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define i32 @udiv_by_minus1(i32 %A) {
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; CHECK-LABEL: @udiv_by_minus1(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[A:%.*]], -1
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; CHECK-NEXT: [[B:%.*]] = zext i1 [[TMP1]] to i32
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; CHECK-NEXT: ret i32 [[B]]
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;
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%B = udiv i32 %A, -1
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ret i32 %B
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}
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define <2 x i64> @udiv_by_minus1_vec(<2 x i64> %x) {
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; CHECK-LABEL: @udiv_by_minus1_vec(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp eq <2 x i64> [[X:%.*]], <i64 -1, i64 -1>
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; CHECK-NEXT: [[DIV:%.*]] = zext <2 x i1> [[TMP1]] to <2 x i64>
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; CHECK-NEXT: ret <2 x i64> [[DIV]]
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;
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%div = udiv <2 x i64> %x, <i64 -1, i64 -1>
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ret <2 x i64> %div
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}
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define i32 @udiv_by_sext_all_ones(i1 %x, i32 %y) {
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; CHECK-LABEL: @udiv_by_sext_all_ones(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[Y:%.*]], -1
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; CHECK-NEXT: [[DIV:%.*]] = zext i1 [[TMP1]] to i32
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; CHECK-NEXT: ret i32 [[DIV]]
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;
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%sext = sext i1 %x to i32
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%div = udiv i32 %y, %sext
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ret i32 %div
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}
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define <2 x i32> @udiv_by_sext_all_ones_vec(<2 x i1> %x, <2 x i32> %y) {
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; CHECK-LABEL: @udiv_by_sext_all_ones_vec(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp eq <2 x i32> [[Y:%.*]], <i32 -1, i32 -1>
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; CHECK-NEXT: [[DIV:%.*]] = zext <2 x i1> [[TMP1]] to <2 x i32>
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; CHECK-NEXT: ret <2 x i32> [[DIV]]
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;
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%sext = sext <2 x i1> %x to <2 x i32>
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%div = udiv <2 x i32> %y, %sext
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ret <2 x i32> %div
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}
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define i32 @test5(i32 %A) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: ret i32 0
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;
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%B = udiv i32 %A, -16
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%C = udiv i32 %B, -4
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ret i32 %C
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}
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define i1 @test6(i32 %A) {
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[A:%.*]], 123
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; CHECK-NEXT: ret i1 [[TMP1]]
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;
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%B = udiv i32 %A, 123
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; A < 123
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%C = icmp eq i32 %B, 0
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ret i1 %C
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}
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define i1 @test7(i32 %A) {
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; CHECK-LABEL: @test7(
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; CHECK-NEXT: [[A_OFF:%.*]] = add i32 [[A:%.*]], -20
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[A_OFF]], 10
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; CHECK-NEXT: ret i1 [[TMP1]]
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;
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%B = udiv i32 %A, 10
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; A >= 20 && A < 30
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%C = icmp eq i32 %B, 2
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ret i1 %C
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}
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define <2 x i1> @test7vec(<2 x i32> %A) {
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; CHECK-LABEL: @test7vec(
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; CHECK-NEXT: [[A_OFF:%.*]] = add <2 x i32> [[A:%.*]], <i32 -20, i32 -20>
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ult <2 x i32> [[A_OFF]], <i32 10, i32 10>
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; CHECK-NEXT: ret <2 x i1> [[TMP1]]
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;
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%B = udiv <2 x i32> %A, <i32 10, i32 10>
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%C = icmp eq <2 x i32> %B, <i32 2, i32 2>
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ret <2 x i1> %C
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}
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define i1 @test8(i8 %A) {
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; CHECK-LABEL: @test8(
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; CHECK-NEXT: [[C:%.*]] = icmp ugt i8 [[A:%.*]], -11
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; CHECK-NEXT: ret i1 [[C]]
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;
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%B = udiv i8 %A, 123
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; A >= 246
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%C = icmp eq i8 %B, 2
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ret i1 %C
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}
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define <2 x i1> @test8vec(<2 x i8> %A) {
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; CHECK-LABEL: @test8vec(
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; CHECK-NEXT: [[C:%.*]] = icmp ugt <2 x i8> [[A:%.*]], <i8 -11, i8 -11>
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; CHECK-NEXT: ret <2 x i1> [[C]]
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;
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%B = udiv <2 x i8> %A, <i8 123, i8 123>
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%C = icmp eq <2 x i8> %B, <i8 2, i8 2>
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ret <2 x i1> %C
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}
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define i1 @test9(i8 %A) {
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; CHECK-LABEL: @test9(
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; CHECK-NEXT: [[C:%.*]] = icmp ult i8 [[A:%.*]], -10
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; CHECK-NEXT: ret i1 [[C]]
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;
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%B = udiv i8 %A, 123
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; A < 246
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%C = icmp ne i8 %B, 2
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ret i1 %C
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}
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||
|
|
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||
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define <2 x i1> @test9vec(<2 x i8> %A) {
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||
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; CHECK-LABEL: @test9vec(
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||
|
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; CHECK-NEXT: [[C:%.*]] = icmp ult <2 x i8> [[A:%.*]], <i8 -10, i8 -10>
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||
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; CHECK-NEXT: ret <2 x i1> [[C]]
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;
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||
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%B = udiv <2 x i8> %A, <i8 123, i8 123>
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%C = icmp ne <2 x i8> %B, <i8 2, i8 2>
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ret <2 x i1> %C
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}
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define i32 @test10(i32 %X, i1 %C) {
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; CHECK-LABEL: @test10(
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; CHECK-NEXT: [[R_V:%.*]] = select i1 [[C:%.*]], i32 6, i32 3
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; CHECK-NEXT: [[R:%.*]] = lshr i32 [[X:%.*]], [[R_V]]
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; CHECK-NEXT: ret i32 [[R]]
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;
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%V = select i1 %C, i32 64, i32 8
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%R = udiv i32 %X, %V
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ret i32 %R
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}
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||
|
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||
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define i32 @test11(i32 %X, i1 %C) {
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; CHECK-LABEL: @test11(
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; CHECK-NEXT: [[B_V:%.*]] = select i1 [[C:%.*]], i32 10, i32 5
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; CHECK-NEXT: [[B:%.*]] = lshr i32 [[X:%.*]], [[B_V]]
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||
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; CHECK-NEXT: ret i32 [[B]]
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;
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||
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%A = select i1 %C, i32 1024, i32 32
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%B = udiv i32 %X, %A
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ret i32 %B
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}
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|
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||
|
|
; PR2328
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define i32 @test12(i32 %x) {
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; CHECK-LABEL: @test12(
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; CHECK-NEXT: ret i32 1
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;
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||
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%tmp3 = udiv i32 %x, %x ; 1
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ret i32 %tmp3
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}
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|
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||
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define i32 @test13(i32 %x) {
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; CHECK-LABEL: @test13(
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||
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; CHECK-NEXT: ret i32 1
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;
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||
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%tmp3 = sdiv i32 %x, %x ; 1
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ret i32 %tmp3
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}
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||
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|
|
||
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define i32 @test14(i8 %x) {
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||
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; CHECK-LABEL: @test14(
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||
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; CHECK-NEXT: ret i32 0
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||
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;
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||
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%zext = zext i8 %x to i32
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||
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%div = udiv i32 %zext, 257 ; 0
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ret i32 %div
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||
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}
|
||
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||
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|
; PR9814
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define i32 @test15(i32 %a, i32 %b) {
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||
|
|
; CHECK-LABEL: @test15(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[B:%.*]], -2
|
||
|
|
; CHECK-NEXT: [[DIV2:%.*]] = lshr i32 [[A:%.*]], [[TMP1]]
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||
|
|
; CHECK-NEXT: ret i32 [[DIV2]]
|
||
|
|
;
|
||
|
|
%shl = shl i32 1, %b
|
||
|
|
%div = lshr i32 %shl, 2
|
||
|
|
%div2 = udiv i32 %a, %div
|
||
|
|
ret i32 %div2
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i64> @test16(<2 x i64> %x) {
|
||
|
|
; CHECK-LABEL: @test16(
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = udiv <2 x i64> [[X:%.*]], <i64 192, i64 192>
|
||
|
|
; CHECK-NEXT: ret <2 x i64> [[DIV]]
|
||
|
|
;
|
||
|
|
%shr = lshr <2 x i64> %x, <i64 5, i64 5>
|
||
|
|
%div = udiv <2 x i64> %shr, <i64 6, i64 6>
|
||
|
|
ret <2 x i64> %div
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test19(i32 %x) {
|
||
|
|
; CHECK-LABEL: @test19(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[X:%.*]], 1
|
||
|
|
; CHECK-NEXT: [[A:%.*]] = zext i1 [[TMP1]] to i32
|
||
|
|
; CHECK-NEXT: ret i32 [[A]]
|
||
|
|
;
|
||
|
|
%A = udiv i32 1, %x
|
||
|
|
ret i32 %A
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i32> @test19vec(<2 x i32> %x) {
|
||
|
|
; CHECK-LABEL: @test19vec(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq <2 x i32> [[X:%.*]], <i32 1, i32 1>
|
||
|
|
; CHECK-NEXT: [[A:%.*]] = zext <2 x i1> [[TMP1]] to <2 x i32>
|
||
|
|
; CHECK-NEXT: ret <2 x i32> [[A]]
|
||
|
|
;
|
||
|
|
%A = udiv <2 x i32> <i32 1, i32 1>, %x
|
||
|
|
ret <2 x i32> %A
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test20(i32 %x) {
|
||
|
|
; CHECK-LABEL: @test20(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[X:%.*]], 1
|
||
|
|
; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i32 [[TMP1]], 3
|
||
|
|
; CHECK-NEXT: [[A:%.*]] = select i1 [[TMP2]], i32 [[X]], i32 0
|
||
|
|
; CHECK-NEXT: ret i32 [[A]]
|
||
|
|
;
|
||
|
|
%A = sdiv i32 1, %x
|
||
|
|
ret i32 %A
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i32> @test20vec(<2 x i32> %x) {
|
||
|
|
; CHECK-LABEL: @test20vec(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = add <2 x i32> [[X:%.*]], <i32 1, i32 1>
|
||
|
|
; CHECK-NEXT: [[TMP2:%.*]] = icmp ult <2 x i32> [[TMP1]], <i32 3, i32 3>
|
||
|
|
; CHECK-NEXT: [[A:%.*]] = select <2 x i1> [[TMP2]], <2 x i32> [[X]], <2 x i32> zeroinitializer
|
||
|
|
; CHECK-NEXT: ret <2 x i32> [[A]]
|
||
|
|
;
|
||
|
|
%A = sdiv <2 x i32> <i32 1, i32 1>, %x
|
||
|
|
ret <2 x i32> %A
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test21(i32 %a) {
|
||
|
|
; CHECK-LABEL: @test21(
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 [[A:%.*]], 3
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV]]
|
||
|
|
;
|
||
|
|
%shl = shl nsw i32 %a, 2
|
||
|
|
%div = sdiv i32 %shl, 12
|
||
|
|
ret i32 %div
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test22(i32 %a) {
|
||
|
|
; CHECK-LABEL: @test22(
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 [[A:%.*]], 4
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV]]
|
||
|
|
;
|
||
|
|
%mul = mul nsw i32 %a, 3
|
||
|
|
%div = sdiv i32 %mul, 12
|
||
|
|
ret i32 %div
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test23(i32 %a) {
|
||
|
|
; CHECK-LABEL: @test23(
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = udiv i32 [[A:%.*]], 3
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV]]
|
||
|
|
;
|
||
|
|
%shl = shl nuw i32 %a, 2
|
||
|
|
%div = udiv i32 %shl, 12
|
||
|
|
ret i32 %div
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test24(i32 %a) {
|
||
|
|
; CHECK-LABEL: @test24(
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = lshr i32 [[A:%.*]], 2
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV]]
|
||
|
|
;
|
||
|
|
%mul = mul nuw i32 %a, 3
|
||
|
|
%div = udiv i32 %mul, 12
|
||
|
|
ret i32 %div
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test25(i32 %a) {
|
||
|
|
; CHECK-LABEL: @test25(
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = shl nsw i32 [[A:%.*]], 1
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV]]
|
||
|
|
;
|
||
|
|
%shl = shl nsw i32 %a, 2
|
||
|
|
%div = sdiv i32 %shl, 2
|
||
|
|
ret i32 %div
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test26(i32 %a) {
|
||
|
|
; CHECK-LABEL: @test26(
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = shl nsw i32 [[A:%.*]], 2
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV]]
|
||
|
|
;
|
||
|
|
%mul = mul nsw i32 %a, 12
|
||
|
|
%div = sdiv i32 %mul, 3
|
||
|
|
ret i32 %div
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test27(i32 %a) {
|
||
|
|
; CHECK-LABEL: @test27(
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = shl nuw i32 [[A:%.*]], 1
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV]]
|
||
|
|
;
|
||
|
|
%shl = shl nuw i32 %a, 2
|
||
|
|
%div = udiv i32 %shl, 2
|
||
|
|
ret i32 %div
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test28(i32 %a) {
|
||
|
|
; CHECK-LABEL: @test28(
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = mul nuw i32 [[A:%.*]], 12
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV]]
|
||
|
|
;
|
||
|
|
%mul = mul nuw i32 %a, 36
|
||
|
|
%div = udiv i32 %mul, 3
|
||
|
|
ret i32 %div
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test29(i32 %a) {
|
||
|
|
; CHECK-LABEL: @test29(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[A:%.*]], -1
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = zext i1 [[TMP1]] to i32
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV]]
|
||
|
|
;
|
||
|
|
%mul = shl nsw i32 %a, 31
|
||
|
|
%div = sdiv i32 %mul, -2147483648
|
||
|
|
ret i32 %div
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test30(i32 %a) {
|
||
|
|
; CHECK-LABEL: @test30(
|
||
|
|
; CHECK-NEXT: ret i32 [[A:%.*]]
|
||
|
|
;
|
||
|
|
%mul = shl nuw i32 %a, 31
|
||
|
|
%div = udiv i32 %mul, -2147483648
|
||
|
|
ret i32 %div
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i32> @test31(<2 x i32> %x) {
|
||
|
|
; CHECK-LABEL: @test31(
|
||
|
|
; CHECK-NEXT: ret <2 x i32> zeroinitializer
|
||
|
|
;
|
||
|
|
%shr = lshr <2 x i32> %x, <i32 31, i32 31>
|
||
|
|
%div = udiv <2 x i32> %shr, <i32 2147483647, i32 2147483647>
|
||
|
|
ret <2 x i32> %div
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test32(i32 %a, i32 %b) {
|
||
|
|
; CHECK-LABEL: @test32(
|
||
|
|
; CHECK-NEXT: [[SHL:%.*]] = shl i32 2, [[B:%.*]]
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = lshr i32 [[SHL]], 2
|
||
|
|
; CHECK-NEXT: [[DIV2:%.*]] = udiv i32 [[A:%.*]], [[DIV]]
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV2]]
|
||
|
|
;
|
||
|
|
%shl = shl i32 2, %b
|
||
|
|
%div = lshr i32 %shl, 2
|
||
|
|
%div2 = udiv i32 %a, %div
|
||
|
|
ret i32 %div2
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i64> @test33(<2 x i64> %x) {
|
||
|
|
; CHECK-LABEL: @test33(
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = udiv exact <2 x i64> [[X:%.*]], <i64 192, i64 192>
|
||
|
|
; CHECK-NEXT: ret <2 x i64> [[DIV]]
|
||
|
|
;
|
||
|
|
%shr = lshr exact <2 x i64> %x, <i64 5, i64 5>
|
||
|
|
%div = udiv exact <2 x i64> %shr, <i64 6, i64 6>
|
||
|
|
ret <2 x i64> %div
|
||
|
|
}
|
||
|
|
|
||
|
|
; -X / C --> X / -C (if negation does not overflow)
|
||
|
|
|
||
|
|
define i8 @sdiv_negated_dividend_constant_divisor(i8 %x) {
|
||
|
|
; CHECK-LABEL: @sdiv_negated_dividend_constant_divisor(
|
||
|
|
; CHECK-NEXT: [[D:%.*]] = sdiv i8 [[X:%.*]], 42
|
||
|
|
; CHECK-NEXT: ret i8 [[D]]
|
||
|
|
;
|
||
|
|
%neg = sub nsw i8 0, %x
|
||
|
|
%d = sdiv i8 %neg, -42
|
||
|
|
ret i8 %d
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i8> @sdiv_negated_dividend_constant_divisor_vec_splat(<2 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @sdiv_negated_dividend_constant_divisor_vec_splat(
|
||
|
|
; CHECK-NEXT: [[D:%.*]] = sdiv <2 x i8> [[X:%.*]], <i8 42, i8 42>
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[D]]
|
||
|
|
;
|
||
|
|
%neg = sub nsw <2 x i8> zeroinitializer, %x
|
||
|
|
%d = sdiv <2 x i8> %neg, <i8 -42, i8 -42>
|
||
|
|
ret <2 x i8> %d
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8 @sdiv_exact_negated_dividend_constant_divisor(i8 %x) {
|
||
|
|
; CHECK-LABEL: @sdiv_exact_negated_dividend_constant_divisor(
|
||
|
|
; CHECK-NEXT: [[D:%.*]] = sdiv exact i8 [[X:%.*]], 42
|
||
|
|
; CHECK-NEXT: ret i8 [[D]]
|
||
|
|
;
|
||
|
|
%neg = sub nsw i8 0, %x
|
||
|
|
%d = sdiv exact i8 %neg, -42
|
||
|
|
ret i8 %d
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i8> @sdiv_exact_negated_dividend_constant_divisor_vec_splat(<2 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @sdiv_exact_negated_dividend_constant_divisor_vec_splat(
|
||
|
|
; CHECK-NEXT: [[D:%.*]] = sdiv exact <2 x i8> [[X:%.*]], <i8 42, i8 42>
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[D]]
|
||
|
|
;
|
||
|
|
%neg = sub nsw <2 x i8> zeroinitializer, %x
|
||
|
|
%d = sdiv exact <2 x i8> %neg, <i8 -42, i8 -42>
|
||
|
|
ret <2 x i8> %d
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8 @sdiv_negated_dividend_constant_divisor_smin(i8 %x) {
|
||
|
|
; CHECK-LABEL: @sdiv_negated_dividend_constant_divisor_smin(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i8 [[X:%.*]], -128
|
||
|
|
; CHECK-NEXT: [[D:%.*]] = zext i1 [[TMP1]] to i8
|
||
|
|
; CHECK-NEXT: ret i8 [[D]]
|
||
|
|
;
|
||
|
|
%neg = sub nsw i8 0, %x
|
||
|
|
%d = sdiv i8 %neg, -128
|
||
|
|
ret i8 %d
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i8> @sdiv_negated_dividend_constant_divisor_vec_splat_smin(<2 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @sdiv_negated_dividend_constant_divisor_vec_splat_smin(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq <2 x i8> [[X:%.*]], <i8 -128, i8 -128>
|
||
|
|
; CHECK-NEXT: [[D:%.*]] = zext <2 x i1> [[TMP1]] to <2 x i8>
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[D]]
|
||
|
|
;
|
||
|
|
%neg = sub nsw <2 x i8> zeroinitializer, %x
|
||
|
|
%d = sdiv <2 x i8> %neg, <i8 -128, i8 -128>
|
||
|
|
ret <2 x i8> %d
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i8> @sdiv_negated_dividend_constant_divisor_vec_undef(<2 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @sdiv_negated_dividend_constant_divisor_vec_undef(
|
||
|
|
; CHECK-NEXT: ret <2 x i8> poison
|
||
|
|
;
|
||
|
|
%neg = sub nsw <2 x i8> zeroinitializer, %x
|
||
|
|
%d = sdiv <2 x i8> %neg, <i8 -128, i8 undef>
|
||
|
|
ret <2 x i8> %d
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i64> @sdiv_negated_dividend_constant_divisor_vec(<2 x i64> %x) {
|
||
|
|
; CHECK-LABEL: @sdiv_negated_dividend_constant_divisor_vec(
|
||
|
|
; CHECK-NEXT: [[DIV1_NEG:%.*]] = sdiv <2 x i64> [[X:%.*]], <i64 -3, i64 -4>
|
||
|
|
; CHECK-NEXT: ret <2 x i64> [[DIV1_NEG]]
|
||
|
|
;
|
||
|
|
%neg = sub nsw <2 x i64> zeroinitializer, %x
|
||
|
|
%div = sdiv <2 x i64> %neg, <i64 3, i64 4>
|
||
|
|
ret <2 x i64> %div
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i64> @sdiv_exact_negated_dividend_constant_divisor_vec(<2 x i64> %x) {
|
||
|
|
; CHECK-LABEL: @sdiv_exact_negated_dividend_constant_divisor_vec(
|
||
|
|
; CHECK-NEXT: [[DIV1_NEG:%.*]] = sdiv exact <2 x i64> [[X:%.*]], <i64 -3, i64 -4>
|
||
|
|
; CHECK-NEXT: ret <2 x i64> [[DIV1_NEG]]
|
||
|
|
;
|
||
|
|
%neg = sub nsw <2 x i64> zeroinitializer, %x
|
||
|
|
%div = sdiv exact <2 x i64> %neg, <i64 3, i64 4>
|
||
|
|
ret <2 x i64> %div
|
||
|
|
}
|
||
|
|
|
||
|
|
; Can't negate signed min vector element.
|
||
|
|
|
||
|
|
define <2 x i8> @sdiv_exact_negated_dividend_constant_divisor_vec_overflow(<2 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @sdiv_exact_negated_dividend_constant_divisor_vec_overflow(
|
||
|
|
; CHECK-NEXT: [[DIV1:%.*]] = sdiv exact <2 x i8> [[X:%.*]], <i8 -128, i8 42>
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = sub nsw <2 x i8> zeroinitializer, [[DIV1]]
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[DIV]]
|
||
|
|
;
|
||
|
|
%neg = sub nsw <2 x i8> zeroinitializer, %x
|
||
|
|
%div = sdiv exact <2 x i8> %neg, <i8 -128, i8 42>
|
||
|
|
ret <2 x i8> %div
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test35(i32 %A) {
|
||
|
|
; CHECK-LABEL: @test35(
|
||
|
|
; CHECK-NEXT: [[AND:%.*]] = and i32 [[A:%.*]], 2147483647
|
||
|
|
; CHECK-NEXT: [[MUL:%.*]] = udiv exact i32 [[AND]], 2147483647
|
||
|
|
; CHECK-NEXT: ret i32 [[MUL]]
|
||
|
|
;
|
||
|
|
%and = and i32 %A, 2147483647
|
||
|
|
%mul = sdiv exact i32 %and, 2147483647
|
||
|
|
ret i32 %mul
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i32> @test35vec(<2 x i32> %A) {
|
||
|
|
; CHECK-LABEL: @test35vec(
|
||
|
|
; CHECK-NEXT: [[AND:%.*]] = and <2 x i32> [[A:%.*]], <i32 2147483647, i32 2147483647>
|
||
|
|
; CHECK-NEXT: [[MUL:%.*]] = udiv exact <2 x i32> [[AND]], <i32 2147483647, i32 2147483647>
|
||
|
|
; CHECK-NEXT: ret <2 x i32> [[MUL]]
|
||
|
|
;
|
||
|
|
%and = and <2 x i32> %A, <i32 2147483647, i32 2147483647>
|
||
|
|
%mul = sdiv exact <2 x i32> %and, <i32 2147483647, i32 2147483647>
|
||
|
|
ret <2 x i32> %mul
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test36(i32 %A) {
|
||
|
|
; CHECK-LABEL: @test36(
|
||
|
|
; CHECK-NEXT: [[AND:%.*]] = and i32 [[A:%.*]], 2147483647
|
||
|
|
; CHECK-NEXT: [[MUL:%.*]] = lshr exact i32 [[AND]], [[A]]
|
||
|
|
; CHECK-NEXT: ret i32 [[MUL]]
|
||
|
|
;
|
||
|
|
%and = and i32 %A, 2147483647
|
||
|
|
%shl = shl nsw i32 1, %A
|
||
|
|
%mul = sdiv exact i32 %and, %shl
|
||
|
|
ret i32 %mul
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i32> @test36vec(<2 x i32> %A) {
|
||
|
|
; CHECK-LABEL: @test36vec(
|
||
|
|
; CHECK-NEXT: [[AND:%.*]] = and <2 x i32> [[A:%.*]], <i32 2147483647, i32 2147483647>
|
||
|
|
; CHECK-NEXT: [[MUL:%.*]] = lshr exact <2 x i32> [[AND]], [[A]]
|
||
|
|
; CHECK-NEXT: ret <2 x i32> [[MUL]]
|
||
|
|
;
|
||
|
|
%and = and <2 x i32> %A, <i32 2147483647, i32 2147483647>
|
||
|
|
%shl = shl nsw <2 x i32> <i32 1, i32 1>, %A
|
||
|
|
%mul = sdiv exact <2 x i32> %and, %shl
|
||
|
|
ret <2 x i32> %mul
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test37(i32* %b) {
|
||
|
|
; CHECK-LABEL: @test37(
|
||
|
|
; CHECK-NEXT: entry:
|
||
|
|
; CHECK-NEXT: store i32 0, i32* [[B:%.*]], align 4
|
||
|
|
; CHECK-NEXT: br i1 undef, label [[LOR_RHS:%.*]], label [[LOR_END:%.*]]
|
||
|
|
; CHECK: lor.rhs:
|
||
|
|
; CHECK-NEXT: br label [[LOR_END]]
|
||
|
|
; CHECK: lor.end:
|
||
|
|
; CHECK-NEXT: ret i32 0
|
||
|
|
;
|
||
|
|
entry:
|
||
|
|
store i32 0, i32* %b, align 4
|
||
|
|
%0 = load i32, i32* %b, align 4
|
||
|
|
br i1 undef, label %lor.rhs, label %lor.end
|
||
|
|
|
||
|
|
lor.rhs: ; preds = %entry
|
||
|
|
%mul = mul nsw i32 undef, %0
|
||
|
|
br label %lor.end
|
||
|
|
|
||
|
|
lor.end: ; preds = %lor.rhs, %entry
|
||
|
|
%t.0 = phi i32 [ %0, %entry ], [ %mul, %lor.rhs ]
|
||
|
|
%div = sdiv i32 %t.0, 2
|
||
|
|
ret i32 %div
|
||
|
|
}
|
||
|
|
|
||
|
|
; We can perform the division in the smaller type.
|
||
|
|
|
||
|
|
define i32 @shrink(i8 %x) {
|
||
|
|
; CHECK-LABEL: @shrink(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sdiv i8 [[X:%.*]], 127
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = sext i8 [[TMP1]] to i32
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV]]
|
||
|
|
;
|
||
|
|
%conv = sext i8 %x to i32
|
||
|
|
%div = sdiv i32 %conv, 127
|
||
|
|
ret i32 %div
|
||
|
|
}
|
||
|
|
|
||
|
|
; Division in the smaller type can lead to more optimizations.
|
||
|
|
|
||
|
|
define i32 @zap(i8 %x) {
|
||
|
|
; CHECK-LABEL: @zap(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i8 [[X:%.*]], -128
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = zext i1 [[TMP1]] to i32
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV]]
|
||
|
|
;
|
||
|
|
%conv = sext i8 %x to i32
|
||
|
|
%div = sdiv i32 %conv, -128
|
||
|
|
ret i32 %div
|
||
|
|
}
|
||
|
|
|
||
|
|
; Splat constant divisors should get the same folds.
|
||
|
|
|
||
|
|
define <3 x i32> @shrink_vec(<3 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @shrink_vec(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sdiv <3 x i8> [[X:%.*]], <i8 127, i8 127, i8 127>
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = sext <3 x i8> [[TMP1]] to <3 x i32>
|
||
|
|
; CHECK-NEXT: ret <3 x i32> [[DIV]]
|
||
|
|
;
|
||
|
|
%conv = sext <3 x i8> %x to <3 x i32>
|
||
|
|
%div = sdiv <3 x i32> %conv, <i32 127, i32 127, i32 127>
|
||
|
|
ret <3 x i32> %div
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i32> @zap_vec(<2 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @zap_vec(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq <2 x i8> [[X:%.*]], <i8 -128, i8 -128>
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = zext <2 x i1> [[TMP1]] to <2 x i32>
|
||
|
|
; CHECK-NEXT: ret <2 x i32> [[DIV]]
|
||
|
|
;
|
||
|
|
%conv = sext <2 x i8> %x to <2 x i32>
|
||
|
|
%div = sdiv <2 x i32> %conv, <i32 -128, i32 -128>
|
||
|
|
ret <2 x i32> %div
|
||
|
|
}
|
||
|
|
|
||
|
|
; But we can't do this if the signed constant won't fit in the original type.
|
||
|
|
|
||
|
|
define i32 @shrink_no(i8 %x) {
|
||
|
|
; CHECK-LABEL: @shrink_no(
|
||
|
|
; CHECK-NEXT: [[CONV:%.*]] = sext i8 [[X:%.*]] to i32
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 [[CONV]], 128
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV]]
|
||
|
|
;
|
||
|
|
%conv = sext i8 %x to i32
|
||
|
|
%div = sdiv i32 %conv, 128
|
||
|
|
ret i32 %div
|
||
|
|
}
|
||
|
|
|
||
|
|
; When the divisor is known larger than the quotient,
|
||
|
|
; InstSimplify should kill it before InstCombine sees it.
|
||
|
|
|
||
|
|
define i32 @shrink_no2(i8 %x) {
|
||
|
|
; CHECK-LABEL: @shrink_no2(
|
||
|
|
; CHECK-NEXT: ret i32 0
|
||
|
|
;
|
||
|
|
%conv = sext i8 %x to i32
|
||
|
|
%div = sdiv i32 %conv, -129
|
||
|
|
ret i32 %div
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @shrink_no3(i16 %x) {
|
||
|
|
; CHECK-LABEL: @shrink_no3(
|
||
|
|
; CHECK-NEXT: ret i32 0
|
||
|
|
;
|
||
|
|
%conv = sext i16 %x to i32
|
||
|
|
%div = sdiv i32 %conv, 65535
|
||
|
|
ret i32 %div
|
||
|
|
}
|
||
|
|
|
||
|
|
; This previously crashed when trying to simplify the zext/icmp this becomes.
|
||
|
|
define <2 x i8> @PR34841(<2 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @PR34841(
|
||
|
|
; CHECK-NEXT: ret <2 x i8> zeroinitializer
|
||
|
|
;
|
||
|
|
%neg = and <2 x i8> %x, <i8 2, i8 2>
|
||
|
|
%div = udiv <2 x i8> <i8 1, i8 1>, %neg
|
||
|
|
ret <2 x i8> %div
|
||
|
|
}
|
||
|
|
|
||
|
|
; X / (X * Y) -> 1 / Y if the multiplication does not overflow
|
||
|
|
|
||
|
|
define i8 @div_factor_signed(i8 %x, i8 %y) {
|
||
|
|
; CHECK-LABEL: @div_factor_signed(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = add i8 [[Y:%.*]], 1
|
||
|
|
; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], 3
|
||
|
|
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP2]], i8 [[Y]], i8 0
|
||
|
|
; CHECK-NEXT: ret i8 [[R]]
|
||
|
|
;
|
||
|
|
%a = mul nsw i8 %x, %y
|
||
|
|
%r = sdiv i8 %x, %a
|
||
|
|
ret i8 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
; X / (Y * X) -> 1 / Y if the multiplication does not overflow
|
||
|
|
|
||
|
|
define <2 x i8> @div_factor_signed_vec(<2 x i8> %x, <2 x i8> %y) {
|
||
|
|
; CHECK-LABEL: @div_factor_signed_vec(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = add <2 x i8> [[Y:%.*]], <i8 1, i8 1>
|
||
|
|
; CHECK-NEXT: [[TMP2:%.*]] = icmp ult <2 x i8> [[TMP1]], <i8 3, i8 3>
|
||
|
|
; CHECK-NEXT: [[R:%.*]] = select <2 x i1> [[TMP2]], <2 x i8> [[Y]], <2 x i8> zeroinitializer
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[R]]
|
||
|
|
;
|
||
|
|
%a = mul nsw <2 x i8> %y, %x
|
||
|
|
%r = sdiv <2 x i8> %x, %a
|
||
|
|
ret <2 x i8> %r
|
||
|
|
}
|
||
|
|
|
||
|
|
; X / (Y * X) -> 1 / Y if the multiplication does not overflow
|
||
|
|
|
||
|
|
define i8 @div_factor_unsigned(i8 %x, i8 %y) {
|
||
|
|
; CHECK-LABEL: @div_factor_unsigned(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i8 [[Y:%.*]], 1
|
||
|
|
; CHECK-NEXT: [[R:%.*]] = zext i1 [[TMP1]] to i8
|
||
|
|
; CHECK-NEXT: ret i8 [[R]]
|
||
|
|
;
|
||
|
|
%a = mul nuw i8 %y, %x
|
||
|
|
%r = udiv i8 %x, %a
|
||
|
|
ret i8 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
; X / (X * Y) -> 1 / Y if the multiplication does not overflow
|
||
|
|
|
||
|
|
define <2 x i8> @div_factor_unsigned_vec(<2 x i8> %x, <2 x i8> %y) {
|
||
|
|
; CHECK-LABEL: @div_factor_unsigned_vec(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq <2 x i8> [[Y:%.*]], <i8 1, i8 1>
|
||
|
|
; CHECK-NEXT: [[R:%.*]] = zext <2 x i1> [[TMP1]] to <2 x i8>
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[R]]
|
||
|
|
;
|
||
|
|
%a = mul nuw <2 x i8> %x, %y
|
||
|
|
%r = udiv <2 x i8> %x, %a
|
||
|
|
ret <2 x i8> %r
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8 @udiv_common_factor(i8 %x, i8 %y, i8 %z) {
|
||
|
|
; CHECK-LABEL: @udiv_common_factor(
|
||
|
|
; CHECK-NEXT: [[C:%.*]] = udiv i8 [[X:%.*]], [[Y:%.*]]
|
||
|
|
; CHECK-NEXT: ret i8 [[C]]
|
||
|
|
;
|
||
|
|
%a = mul nuw i8 %z, %x
|
||
|
|
%b = mul nuw i8 %z, %y
|
||
|
|
%c = udiv i8 %a, %b
|
||
|
|
ret i8 %c
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i8> @udiv_common_factor_commute1_vec(<2 x i8> %x, <2 x i8> %y, <2 x i8> %z) {
|
||
|
|
; CHECK-LABEL: @udiv_common_factor_commute1_vec(
|
||
|
|
; CHECK-NEXT: [[C:%.*]] = udiv <2 x i8> [[X:%.*]], [[Y:%.*]]
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[C]]
|
||
|
|
;
|
||
|
|
%a = mul nuw <2 x i8> %x, %z
|
||
|
|
%b = mul nuw <2 x i8> %z, %y
|
||
|
|
%c = udiv <2 x i8> %a, %b
|
||
|
|
ret <2 x i8> %c
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8 @udiv_common_factor_commute2(i8 %x, i8 %y, i8 %z) {
|
||
|
|
; CHECK-LABEL: @udiv_common_factor_commute2(
|
||
|
|
; CHECK-NEXT: [[C:%.*]] = udiv i8 [[X:%.*]], [[Y:%.*]]
|
||
|
|
; CHECK-NEXT: ret i8 [[C]]
|
||
|
|
;
|
||
|
|
%a = mul nuw i8 %x, %z
|
||
|
|
%b = mul nuw i8 %y, %z
|
||
|
|
%c = udiv i8 %a, %b
|
||
|
|
ret i8 %c
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8 @udiv_common_factor_commute3(i8 %x, i8 %y, i8 %z) {
|
||
|
|
; CHECK-LABEL: @udiv_common_factor_commute3(
|
||
|
|
; CHECK-NEXT: [[C:%.*]] = udiv i8 [[X:%.*]], [[Y:%.*]]
|
||
|
|
; CHECK-NEXT: ret i8 [[C]]
|
||
|
|
;
|
||
|
|
%a = mul nuw i8 %z, %x
|
||
|
|
%b = mul nuw i8 %y, %z
|
||
|
|
%c = udiv i8 %a, %b
|
||
|
|
ret i8 %c
|
||
|
|
}
|
||
|
|
|
||
|
|
; Negative test: both mul must be 'nuw'.
|
||
|
|
|
||
|
|
define i8 @udiv_common_factor_not_nuw(i8 %x, i8 %y, i8 %z) {
|
||
|
|
; CHECK-LABEL: @udiv_common_factor_not_nuw(
|
||
|
|
; CHECK-NEXT: [[A:%.*]] = mul i8 [[Z:%.*]], [[X:%.*]]
|
||
|
|
; CHECK-NEXT: [[B:%.*]] = mul nuw i8 [[Z]], [[Y:%.*]]
|
||
|
|
; CHECK-NEXT: [[C:%.*]] = udiv i8 [[A]], [[B]]
|
||
|
|
; CHECK-NEXT: ret i8 [[C]]
|
||
|
|
;
|
||
|
|
%a = mul i8 %z, %x
|
||
|
|
%b = mul nuw i8 %z, %y
|
||
|
|
%c = udiv i8 %a, %b
|
||
|
|
ret i8 %c
|
||
|
|
}
|
||
|
|
|
||
|
|
; Negative test: both mul must be 'nuw'.
|
||
|
|
|
||
|
|
define <2 x i8> @udiv_common_factor_not_nuw_vec(<2 x i8> %x, <2 x i8> %y, <2 x i8> %z) {
|
||
|
|
; CHECK-LABEL: @udiv_common_factor_not_nuw_vec(
|
||
|
|
; CHECK-NEXT: [[A:%.*]] = mul nuw <2 x i8> [[Z:%.*]], [[X:%.*]]
|
||
|
|
; CHECK-NEXT: [[B:%.*]] = mul <2 x i8> [[Z]], [[Y:%.*]]
|
||
|
|
; CHECK-NEXT: [[C:%.*]] = udiv <2 x i8> [[A]], [[B]]
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[C]]
|
||
|
|
;
|
||
|
|
%a = mul nuw <2 x i8> %z, %x
|
||
|
|
%b = mul <2 x i8> %z, %y
|
||
|
|
%c = udiv <2 x i8> %a, %b
|
||
|
|
ret <2 x i8> %c
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test_exact_nsw_exact(i32 %x) {
|
||
|
|
; CHECK-LABEL: @test_exact_nsw_exact(
|
||
|
|
; CHECK-NEXT: [[DIV_NEG:%.*]] = sdiv exact i32 [[X:%.*]], -3
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV_NEG]]
|
||
|
|
;
|
||
|
|
%div = sdiv exact i32 %x, 3
|
||
|
|
%neg = sub nsw i32 0, %div
|
||
|
|
ret i32 %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i64> @test_exact_vec(<2 x i64> %x) {
|
||
|
|
; CHECK-LABEL: @test_exact_vec(
|
||
|
|
; CHECK-NEXT: [[DIV_NEG:%.*]] = sdiv exact <2 x i64> [[X:%.*]], <i64 -3, i64 -4>
|
||
|
|
; CHECK-NEXT: ret <2 x i64> [[DIV_NEG]]
|
||
|
|
;
|
||
|
|
%div = sdiv exact <2 x i64> %x, <i64 3, i64 4>
|
||
|
|
%neg = sub nsw <2 x i64> zeroinitializer, %div
|
||
|
|
ret <2 x i64> %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
; Constant is safe to negate.
|
||
|
|
|
||
|
|
define <2 x i8> @negate_sdiv_vec_splat(<2 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @negate_sdiv_vec_splat(
|
||
|
|
; CHECK-NEXT: [[DIV_NEG:%.*]] = sdiv <2 x i8> [[X:%.*]], <i8 -42, i8 -42>
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[DIV_NEG]]
|
||
|
|
;
|
||
|
|
%div = sdiv <2 x i8> %x, <i8 42, i8 42>
|
||
|
|
%neg = sub <2 x i8> zeroinitializer, %div
|
||
|
|
ret <2 x i8> %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
; Dividing by undef is UB.
|
||
|
|
|
||
|
|
define <2 x i8> @negate_sdiv_vec_undef_elt(<2 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @negate_sdiv_vec_undef_elt(
|
||
|
|
; CHECK-NEXT: ret <2 x i8> poison
|
||
|
|
;
|
||
|
|
%div = sdiv <2 x i8> %x, <i8 undef, i8 42>
|
||
|
|
%neg = sub <2 x i8> zeroinitializer, %div
|
||
|
|
ret <2 x i8> %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
; Division by -1 may be UB (if numerator is the signed min val), but div-by-1 can be simplified.
|
||
|
|
|
||
|
|
define <2 x i8> @negate_sdiv_vec_splat_one(<2 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @negate_sdiv_vec_splat_one(
|
||
|
|
; CHECK-NEXT: [[NEG:%.*]] = sub <2 x i8> zeroinitializer, [[X:%.*]]
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[NEG]]
|
||
|
|
;
|
||
|
|
%div = sdiv <2 x i8> %x, <i8 1, i8 1>
|
||
|
|
%neg = sub <2 x i8> zeroinitializer, %div
|
||
|
|
ret <2 x i8> %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
; Can't negate signed-min constant, but can convert to a compare..
|
||
|
|
|
||
|
|
define <2 x i8> @negate_sdiv_vec_splat_signed_min(<2 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @negate_sdiv_vec_splat_signed_min(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq <2 x i8> [[X:%.*]], <i8 -128, i8 -128>
|
||
|
|
; CHECK-NEXT: [[DIV_NEG:%.*]] = sext <2 x i1> [[TMP1]] to <2 x i8>
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[DIV_NEG]]
|
||
|
|
;
|
||
|
|
%div = sdiv <2 x i8> %x, <i8 -128, i8 -128>
|
||
|
|
%neg = sub <2 x i8> zeroinitializer, %div
|
||
|
|
ret <2 x i8> %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
; Division by -1 may be UB for any element of a vector.
|
||
|
|
|
||
|
|
define <2 x i8> @negate_sdiv_vec_one_element(<2 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @negate_sdiv_vec_one_element(
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = sdiv <2 x i8> [[X:%.*]], <i8 -1, i8 1>
|
||
|
|
; CHECK-NEXT: [[NEG:%.*]] = sub <2 x i8> zeroinitializer, [[DIV]]
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[NEG]]
|
||
|
|
;
|
||
|
|
%div = sdiv <2 x i8> %x, <i8 -1, i8 1>
|
||
|
|
%neg = sub <2 x i8> zeroinitializer, %div
|
||
|
|
ret <2 x i8> %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
; Can't negate signed-min constant for any element of a vector.
|
||
|
|
|
||
|
|
define <2 x i8> @negate_sdiv_vec_signed_min_elt(<2 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @negate_sdiv_vec_signed_min_elt(
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = sdiv <2 x i8> [[X:%.*]], <i8 -1, i8 -128>
|
||
|
|
; CHECK-NEXT: [[NEG:%.*]] = sub <2 x i8> zeroinitializer, [[DIV]]
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[NEG]]
|
||
|
|
;
|
||
|
|
%div = sdiv <2 x i8> %x, <i8 -1, i8 -128>
|
||
|
|
%neg = sub <2 x i8> zeroinitializer, %div
|
||
|
|
ret <2 x i8> %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
; Division by -1 may be UB and can't negate signed-min.
|
||
|
|
|
||
|
|
define <2 x i8> @negate_sdiv_vec_signed_min_and_one_elt(<2 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @negate_sdiv_vec_signed_min_and_one_elt(
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = sdiv <2 x i8> [[X:%.*]], <i8 1, i8 -128>
|
||
|
|
; CHECK-NEXT: [[NEG:%.*]] = sub <2 x i8> zeroinitializer, [[DIV]]
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[NEG]]
|
||
|
|
;
|
||
|
|
%div = sdiv <2 x i8> %x, <i8 1, i8 -128>
|
||
|
|
%neg = sub <2 x i8> zeroinitializer, %div
|
||
|
|
ret <2 x i8> %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test_exact_nonsw_exact(i32 %x) {
|
||
|
|
; CHECK-LABEL: @test_exact_nonsw_exact(
|
||
|
|
; CHECK-NEXT: [[DIV_NEG:%.*]] = sdiv exact i32 [[X:%.*]], -3
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV_NEG]]
|
||
|
|
;
|
||
|
|
%div = sdiv exact i32 %x, 3
|
||
|
|
%neg = sub i32 0, %div
|
||
|
|
ret i32 %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test_exact_nsw_noexact(i32 %x) {
|
||
|
|
; CHECK-LABEL: @test_exact_nsw_noexact(
|
||
|
|
; CHECK-NEXT: [[DIV_NEG:%.*]] = sdiv i32 [[X:%.*]], -3
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV_NEG]]
|
||
|
|
;
|
||
|
|
%div = sdiv i32 %x, 3
|
||
|
|
%neg = sub nsw i32 0, %div
|
||
|
|
ret i32 %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test_exact_nonsw_noexact(i32 %x) {
|
||
|
|
; CHECK-LABEL: @test_exact_nonsw_noexact(
|
||
|
|
; CHECK-NEXT: [[DIV_NEG:%.*]] = sdiv i32 [[X:%.*]], -3
|
||
|
|
; CHECK-NEXT: ret i32 [[DIV_NEG]]
|
||
|
|
;
|
||
|
|
%div = sdiv i32 %x, 3
|
||
|
|
%neg = sub i32 0, %div
|
||
|
|
ret i32 %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test_exact_div_nonconst(i32 %x, i32 %y) {
|
||
|
|
; CHECK-LABEL: @test_exact_div_nonconst(
|
||
|
|
; CHECK-NEXT: [[DIV:%.*]] = sdiv exact i32 [[X:%.*]], [[Y:%.*]]
|
||
|
|
; CHECK-NEXT: [[NEG:%.*]] = sub nsw i32 0, [[DIV]]
|
||
|
|
; CHECK-NEXT: ret i32 [[NEG]]
|
||
|
|
;
|
||
|
|
%div = sdiv exact i32 %x, %y
|
||
|
|
%neg = sub nsw i32 0, %div
|
||
|
|
ret i32 %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test_exact_div_one(i32 %x) {
|
||
|
|
; CHECK-LABEL: @test_exact_div_one(
|
||
|
|
; CHECK-NEXT: [[NEG:%.*]] = sub nsw i32 0, [[X:%.*]]
|
||
|
|
; CHECK-NEXT: ret i32 [[NEG]]
|
||
|
|
;
|
||
|
|
%div = sdiv exact i32 %x, 1
|
||
|
|
%neg = sub nsw i32 0, %div
|
||
|
|
ret i32 %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8 @test_exact_div_minSigned(i8 %x) {
|
||
|
|
; CHECK-LABEL: @test_exact_div_minSigned(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i8 [[X:%.*]], -128
|
||
|
|
; CHECK-NEXT: [[DIV_NEG:%.*]] = sext i1 [[TMP1]] to i8
|
||
|
|
; CHECK-NEXT: ret i8 [[DIV_NEG]]
|
||
|
|
;
|
||
|
|
%div = sdiv exact i8 %x, -128
|
||
|
|
%neg = sub nsw i8 0, %div
|
||
|
|
ret i8 %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
; X / INT_MIN --> X == INT_MIN
|
||
|
|
|
||
|
|
define i8 @sdiv_by_int_min(i8 %x) {
|
||
|
|
; CHECK-LABEL: @sdiv_by_int_min(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i8 [[X:%.*]], -128
|
||
|
|
; CHECK-NEXT: [[D:%.*]] = zext i1 [[TMP1]] to i8
|
||
|
|
; CHECK-NEXT: ret i8 [[D]]
|
||
|
|
;
|
||
|
|
%d = sdiv i8 %x, -128
|
||
|
|
ret i8 %d
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i8> @sdiv_by_int_min_vec_splat(<2 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @sdiv_by_int_min_vec_splat(
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq <2 x i8> [[X:%.*]], <i8 -128, i8 -128>
|
||
|
|
; CHECK-NEXT: [[D:%.*]] = zext <2 x i1> [[TMP1]] to <2 x i8>
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[D]]
|
||
|
|
;
|
||
|
|
%d = sdiv <2 x i8> %x, <i8 -128, i8 -128>
|
||
|
|
ret <2 x i8> %d
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i8> @sdiv_by_int_min_vec_splat_undef(<2 x i8> %x) {
|
||
|
|
; CHECK-LABEL: @sdiv_by_int_min_vec_splat_undef(
|
||
|
|
; CHECK-NEXT: ret <2 x i8> poison
|
||
|
|
;
|
||
|
|
%d = sdiv <2 x i8> %x, <i8 -128, i8 undef>
|
||
|
|
ret <2 x i8> %d
|
||
|
|
}
|