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678f32ab66
There is one notable "regression". This patch replaces the bespoke `or disjoint` logic we a direct match. This means we fail some simplification during `instsimplify`. All the cases we fail in `instsimplify` we do handle in `instcombine` as we add `disjoint` flags. Other than that, just some basic cases. See proofs: https://alive2.llvm.org/ce/z/_-g7C8 Closes #86083
602 lines
19 KiB
LLVM
602 lines
19 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S %s -passes=instsimplify | FileCheck %s
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; A ==> A -> true
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define i1 @test(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: ret i1 true
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;
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%var29 = icmp slt i32 %i, %length.i
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%res = icmp uge i1 %var29, %var29
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ret i1 %res
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}
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; i +_{nsw} C_{>0} <s L ==> i <s L -> true
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define i1 @test2(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: ret i1 true
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;
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%iplus1 = add nsw i32 %i, 1
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%var29 = icmp slt i32 %i, %length.i
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%var30 = icmp slt i32 %iplus1, %length.i
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%res = icmp ule i1 %var30, %var29
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ret i1 %res
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}
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; i + C_{>0} <s L ==> i <s L -> unknown without the nsw
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define i1 @test2_neg(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test2_neg(
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; CHECK-NEXT: [[IPLUS1:%.*]] = add i32 [[I:%.*]], 1
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; CHECK-NEXT: [[VAR29:%.*]] = icmp slt i32 [[I]], [[LENGTH_I:%.*]]
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; CHECK-NEXT: [[VAR30:%.*]] = icmp slt i32 [[IPLUS1]], [[LENGTH_I]]
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; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[VAR30]], [[VAR29]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%iplus1 = add i32 %i, 1
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%var29 = icmp slt i32 %i, %length.i
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%var30 = icmp slt i32 %iplus1, %length.i
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%res = icmp ule i1 %var30, %var29
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ret i1 %res
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}
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; sle is not implication
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define i1 @test2_neg2(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test2_neg2(
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; CHECK-NEXT: [[IPLUS1:%.*]] = add i32 [[I:%.*]], 1
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; CHECK-NEXT: [[VAR29:%.*]] = icmp slt i32 [[I]], [[LENGTH_I:%.*]]
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; CHECK-NEXT: [[VAR30:%.*]] = icmp slt i32 [[IPLUS1]], [[LENGTH_I]]
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; CHECK-NEXT: [[RES:%.*]] = icmp sle i1 [[VAR30]], [[VAR29]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%iplus1 = add i32 %i, 1
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%var29 = icmp slt i32 %i, %length.i
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%var30 = icmp slt i32 %iplus1, %length.i
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%res = icmp sle i1 %var30, %var29
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ret i1 %res
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}
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; The binary operator has to be an add
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define i1 @test2_neg3(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test2_neg3(
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; CHECK-NEXT: [[IPLUS1:%.*]] = sub nsw i32 [[I:%.*]], 1
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; CHECK-NEXT: [[VAR29:%.*]] = icmp slt i32 [[I]], [[LENGTH_I:%.*]]
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; CHECK-NEXT: [[VAR30:%.*]] = icmp slt i32 [[IPLUS1]], [[LENGTH_I]]
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; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[VAR30]], [[VAR29]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%iplus1 = sub nsw i32 %i, 1
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%var29 = icmp slt i32 %i, %length.i
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%var30 = icmp slt i32 %iplus1, %length.i
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%res = icmp ule i1 %var30, %var29
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ret i1 %res
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}
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; i +_{nsw} C_{>0} <s L ==> i <s L -> true
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; With an inverted conditional (ule B A rather than canonical ugt A B
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define i1 @test3(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: ret i1 true
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;
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%iplus1 = add nsw i32 %i, 1
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%var29 = icmp slt i32 %i, %length.i
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%var30 = icmp slt i32 %iplus1, %length.i
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%res = icmp uge i1 %var29, %var30
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ret i1 %res
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}
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; i +_{nuw} C <u L ==> i <u L
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define i1 @test4(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: ret i1 true
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;
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%iplus1 = add nuw i32 %i, 1
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%var29 = icmp ult i32 %i, %length.i
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%var30 = icmp ult i32 %iplus1, %length.i
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%res = icmp ule i1 %var30, %var29
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ret i1 %res
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}
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; A ==> A for vectors
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define <4 x i1> @test5(<4 x i1> %vec) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: ret <4 x i1> <i1 true, i1 true, i1 true, i1 true>
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;
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%res = icmp ule <4 x i1> %vec, %vec
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ret <4 x i1> %res
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}
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; Don't crash on vector inputs - pr25040
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define <4 x i1> @test6(<4 x i1> %a, <4 x i1> %b) {
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: [[RES:%.*]] = icmp ule <4 x i1> [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret <4 x i1> [[RES]]
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;
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%res = icmp ule <4 x i1> %a, %b
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ret <4 x i1> %res
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}
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; i +_{nsw} 1 <s L ==> i < L +_{nsw} 1
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define i1 @test7(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test7(
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; CHECK-NEXT: ret i1 true
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;
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%iplus1 = add nsw i32 %i, 1
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%len.plus.one = add nsw i32 %length.i, 1
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%var29 = icmp slt i32 %i, %len.plus.one
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%var30 = icmp slt i32 %iplus1, %length.i
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%res = icmp ule i1 %var30, %var29
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ret i1 %res
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}
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; i +_{nuw} 1 <u L ==> i < L +_{nuw} 1
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define i1 @test8(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test8(
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; CHECK-NEXT: ret i1 true
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;
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%iplus1 = add nuw i32 %i, 1
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%len.plus.one = add nuw i32 %length.i, 1
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%var29 = icmp ult i32 %i, %len.plus.one
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%var30 = icmp ult i32 %iplus1, %length.i
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%res = icmp ule i1 %var30, %var29
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ret i1 %res
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}
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; i +_{nuw} C <u L ==> i < L, even if C is negative
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define i1 @test9(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test9(
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; CHECK-NEXT: ret i1 true
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;
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%iplus1 = add nuw i32 %i, -100
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%var29 = icmp ult i32 %i, %length.i
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%var30 = icmp ult i32 %iplus1, %length.i
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%res = icmp ule i1 %var30, %var29
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ret i1 %res
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}
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define i1 @test10(i32 %length.i, i32 %x.full) {
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; CHECK-LABEL: @test10(
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; CHECK-NEXT: [[X:%.*]] = and i32 [[X_FULL:%.*]], -65536
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; CHECK-NEXT: [[LARGE:%.*]] = or i32 [[X]], 100
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; CHECK-NEXT: [[SMALL:%.*]] = or i32 [[X]], 90
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; CHECK-NEXT: [[KNOWN:%.*]] = icmp ult i32 [[LARGE]], [[LENGTH_I:%.*]]
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; CHECK-NEXT: [[TO_PROVE:%.*]] = icmp ult i32 [[SMALL]], [[LENGTH_I]]
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; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[KNOWN]], [[TO_PROVE]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%x = and i32 %x.full, 4294901760 ;; 4294901760 == 0xffff0000
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%large = or i32 %x, 100
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%small = or i32 %x, 90
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%known = icmp ult i32 %large, %length.i
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%to.prove = icmp ult i32 %small, %length.i
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%res = icmp ule i1 %known, %to.prove
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ret i1 %res
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}
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define i1 @test10_with_disjoint(i32 %length.i, i32 %x.full) {
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; CHECK-LABEL: @test10_with_disjoint(
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; CHECK-NEXT: ret i1 true
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;
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%x = and i32 %x.full, 4294901760 ;; 4294901760 == 0xffff0000
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%large = or disjoint i32 %x, 100
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%small = or disjoint i32 %x, 90
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%known = icmp ult i32 %large, %length.i
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%to.prove = icmp ult i32 %small, %length.i
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%res = icmp ule i1 %known, %to.prove
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ret i1 %res
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}
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define i1 @test11(i32 %length.i, i32 %x) {
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; CHECK-LABEL: @test11(
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; CHECK-NEXT: [[LARGE:%.*]] = or i32 [[X:%.*]], 100
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; CHECK-NEXT: [[SMALL:%.*]] = or i32 [[X]], 90
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; CHECK-NEXT: [[KNOWN:%.*]] = icmp ult i32 [[LARGE]], [[LENGTH_I:%.*]]
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; CHECK-NEXT: [[TO_PROVE:%.*]] = icmp ult i32 [[SMALL]], [[LENGTH_I]]
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; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[KNOWN]], [[TO_PROVE]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%large = or i32 %x, 100
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%small = or i32 %x, 90
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%known = icmp ult i32 %large, %length.i
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%to.prove = icmp ult i32 %small, %length.i
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%res = icmp ule i1 %known, %to.prove
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ret i1 %res
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}
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define i1 @test12(i32 %length.i, i32 %x.full) {
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; CHECK-LABEL: @test12(
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; CHECK-NEXT: [[X:%.*]] = and i32 [[X_FULL:%.*]], -65536
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; CHECK-NEXT: [[LARGE:%.*]] = or i32 [[X]], 65536
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; CHECK-NEXT: [[SMALL:%.*]] = or i32 [[X]], 90
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; CHECK-NEXT: [[KNOWN:%.*]] = icmp ult i32 [[LARGE]], [[LENGTH_I:%.*]]
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; CHECK-NEXT: [[TO_PROVE:%.*]] = icmp ult i32 [[SMALL]], [[LENGTH_I]]
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; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[KNOWN]], [[TO_PROVE]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%x = and i32 %x.full, 4294901760 ;; 4294901760 == 0xffff0000
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%large = or i32 %x, 65536 ;; 65536 == 0x00010000
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%small = or i32 %x, 90
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%known = icmp ult i32 %large, %length.i
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%to.prove = icmp ult i32 %small, %length.i
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%res = icmp ule i1 %known, %to.prove
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ret i1 %res
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}
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define i1 @test13(i32 %length.i, i32 %x) {
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; CHECK-LABEL: @test13(
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; CHECK-NEXT: ret i1 true
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;
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%large = add nuw i32 %x, 100
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%small = add nuw i32 %x, 90
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%known = icmp ult i32 %large, %length.i
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%to.prove = icmp ult i32 %small, %length.i
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%res = icmp ule i1 %known, %to.prove
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ret i1 %res
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}
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define i1 @test14(i32 %length.i, i32 %x.full) {
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; CHECK-LABEL: @test14(
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; CHECK-NEXT: [[X:%.*]] = and i32 [[X_FULL:%.*]], -61681
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; CHECK-NEXT: [[LARGE:%.*]] = or i32 [[X]], 8224
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; CHECK-NEXT: [[SMALL:%.*]] = or i32 [[X]], 4112
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; CHECK-NEXT: [[KNOWN:%.*]] = icmp ult i32 [[LARGE]], [[LENGTH_I:%.*]]
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; CHECK-NEXT: [[TO_PROVE:%.*]] = icmp ult i32 [[SMALL]], [[LENGTH_I]]
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; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[KNOWN]], [[TO_PROVE]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%x = and i32 %x.full, 4294905615 ;; 4294905615 == 0xffff0f0f
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%large = or i32 %x, 8224 ;; == 0x2020
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%small = or i32 %x, 4112 ;; == 0x1010
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%known = icmp ult i32 %large, %length.i
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%to.prove = icmp ult i32 %small, %length.i
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%res = icmp ule i1 %known, %to.prove
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ret i1 %res
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}
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define i1 @test14_with_disjoint(i32 %length.i, i32 %x.full) {
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; CHECK-LABEL: @test14_with_disjoint(
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; CHECK-NEXT: ret i1 true
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;
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%x = and i32 %x.full, 4294905615 ;; 4294905615 == 0xffff0f0f
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%large = or disjoint i32 %x, 8224 ;; == 0x2020
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%small = or disjoint i32 %x, 4112 ;; == 0x1010
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%known = icmp ult i32 %large, %length.i
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%to.prove = icmp ult i32 %small, %length.i
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%res = icmp ule i1 %known, %to.prove
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ret i1 %res
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}
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define i1 @test15(i32 %length.i, i32 %x) {
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; CHECK-LABEL: @test15(
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; CHECK-NEXT: [[LARGE:%.*]] = add nuw i32 [[X:%.*]], 100
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; CHECK-NEXT: [[SMALL:%.*]] = add nuw i32 [[X]], 110
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; CHECK-NEXT: [[KNOWN:%.*]] = icmp ult i32 [[LARGE]], [[LENGTH_I:%.*]]
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; CHECK-NEXT: [[TO_PROVE:%.*]] = icmp ult i32 [[SMALL]], [[LENGTH_I]]
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; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[KNOWN]], [[TO_PROVE]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%large = add nuw i32 %x, 100
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%small = add nuw i32 %x, 110
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%known = icmp ult i32 %large, %length.i
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%to.prove = icmp ult i32 %small, %length.i
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%res = icmp ule i1 %known, %to.prove
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ret i1 %res
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}
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; X >=(s) Y == X ==> Y (i1 1 becomes -1 for reasoning)
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define i1 @test_sge(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test_sge(
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; CHECK-NEXT: ret i1 true
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;
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%iplus1 = add nsw nuw i32 %i, 1
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%var29 = icmp ult i32 %i, %length.i
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%var30 = icmp ult i32 %iplus1, %length.i
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%res = icmp sge i1 %var30, %var29
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ret i1 %res
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}
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; X <=(s) Y == Y ==> X (i1 1 becomes -1 for reasoning)
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define i1 @test_sle(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test_sle(
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; CHECK-NEXT: ret i1 true
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;
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%iplus1 = add nsw nuw i32 %i, 1
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%var29 = icmp ult i32 %i, %length.i
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%var30 = icmp ult i32 %iplus1, %length.i
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%res = icmp sle i1 %var29, %var30
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ret i1 %res
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}
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; X +_{nsw} 1 <(s) Y ==> X <(s) Y
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define i1 @test_sgt_icmp(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test_sgt_icmp(
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; CHECK-NEXT: ret i1 true
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;
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%iplus1 = add nsw i32 %i, 1
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%var29 = icmp sgt i32 %length.i, %i
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%var30 = icmp sgt i32 %length.i, %iplus1
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%res = icmp ule i1 %var30, %var29
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ret i1 %res
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}
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; X +_{nsw} 1 <=(s) Y ==> X <=(s) Y
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define i1 @test_sge_icmp(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test_sge_icmp(
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; CHECK-NEXT: ret i1 true
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;
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%iplus1 = add nsw i32 %i, 1
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%var29 = icmp sge i32 %length.i, %i
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%var30 = icmp sge i32 %length.i, %iplus1
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%res = icmp ule i1 %var30, %var29
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ret i1 %res
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}
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; X +_{nuw} 1 <(u) Y ==> X <(u) Y
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define i1 @test_ugt_icmp(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test_ugt_icmp(
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; CHECK-NEXT: ret i1 true
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;
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%iplus1 = add nuw i32 %i, 1
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%var29 = icmp ugt i32 %length.i, %i
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%var30 = icmp ugt i32 %length.i, %iplus1
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%res = icmp ule i1 %var30, %var29
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ret i1 %res
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}
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; X +_{nuw} 1 <=(u) Y ==> X <=(u) Y
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define i1 @test_uge_icmp(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test_uge_icmp(
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; CHECK-NEXT: ret i1 true
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;
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%iplus1 = add nuw i32 %i, 1
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%var29 = icmp uge i32 %length.i, %i
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%var30 = icmp uge i32 %length.i, %iplus1
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%res = icmp ule i1 %var30, %var29
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ret i1 %res
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}
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; Test from PR70374
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define i1 @pr70374(i32 %x, i32 %y, i32 %z) {
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; CHECK-LABEL: @pr70374(
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; CHECK-NEXT: [[ADD:%.*]] = add nuw i32 [[Y:%.*]], [[Z:%.*]]
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; CHECK-NEXT: [[CMP1:%.*]] = icmp ule i32 [[ADD]], [[X:%.*]]
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; CHECK-NEXT: ret i1 [[CMP1]]
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;
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%add = add nuw i32 %y, %z
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%cmp1 = icmp ule i32 %add, %x
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%cmp2 = icmp uge i32 %x, %y
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%res = and i1 %cmp2, %cmp1
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ret i1 %res
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}
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define i1 @pr70374_commuted_add(i32 %x, i32 %y, i32 %z) {
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; CHECK-LABEL: @pr70374_commuted_add(
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; CHECK-NEXT: [[ADD:%.*]] = add nuw i32 [[Z:%.*]], [[Y:%.*]]
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; CHECK-NEXT: [[CMP1:%.*]] = icmp ule i32 [[ADD]], [[X:%.*]]
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; CHECK-NEXT: ret i1 [[CMP1]]
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;
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%add = add nuw i32 %z, %y
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%cmp1 = icmp ule i32 %add, %x
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%cmp2 = icmp uge i32 %x, %y
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%res = and i1 %cmp2, %cmp1
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ret i1 %res
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}
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define i1 @test_uge_icmp_value(i32 %length.i, i32 %i, i32 %j) {
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; CHECK-LABEL: @test_uge_icmp_value(
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; CHECK-NEXT: ret i1 true
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;
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%iplusj = add nuw i32 %i, %j
|
|
%var29 = icmp uge i32 %length.i, %i
|
|
%var30 = icmp uge i32 %length.i, %iplusj
|
|
%res = icmp ule i1 %var30, %var29
|
|
ret i1 %res
|
|
}
|
|
|
|
; negative case, X + 1 <(s) Y !==> X <(s) Y (X = 0x7fffffff, Y = 0x7fbfffff)
|
|
define i1 @test_sgt_icmp_no_nsw(i32 %length.i, i32 %i) {
|
|
; CHECK-LABEL: @test_sgt_icmp_no_nsw(
|
|
; CHECK-NEXT: [[IPLUS1:%.*]] = add i32 [[I:%.*]], 1
|
|
; CHECK-NEXT: [[VAR29:%.*]] = icmp sgt i32 [[LENGTH_I:%.*]], [[I]]
|
|
; CHECK-NEXT: [[VAR30:%.*]] = icmp sgt i32 [[LENGTH_I]], [[IPLUS1]]
|
|
; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[VAR30]], [[VAR29]]
|
|
; CHECK-NEXT: ret i1 [[RES]]
|
|
;
|
|
%iplus1 = add i32 %i, 1
|
|
%var29 = icmp sgt i32 %length.i, %i
|
|
%var30 = icmp sgt i32 %length.i, %iplus1
|
|
%res = icmp ule i1 %var30, %var29
|
|
ret i1 %res
|
|
}
|
|
|
|
; negative case, X +_{nuw} 1 <(s) Y !==> X <(s) Y
|
|
define i1 @test_sgt_icmp_nuw(i32 %length.i, i32 %i) {
|
|
; CHECK-LABEL: @test_sgt_icmp_nuw(
|
|
; CHECK-NEXT: [[IPLUS1:%.*]] = add nuw i32 [[I:%.*]], 1
|
|
; CHECK-NEXT: [[VAR29:%.*]] = icmp sgt i32 [[I]], [[LENGTH_I:%.*]]
|
|
; CHECK-NEXT: [[VAR30:%.*]] = icmp sgt i32 [[IPLUS1]], [[LENGTH_I]]
|
|
; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[VAR30]], [[VAR29]]
|
|
; CHECK-NEXT: ret i1 [[RES]]
|
|
;
|
|
%iplus1 = add nuw i32 %i, 1
|
|
%var29 = icmp sgt i32 %i, %length.i
|
|
%var30 = icmp sgt i32 %iplus1, %length.i
|
|
%res = icmp ule i1 %var30, %var29
|
|
ret i1 %res
|
|
}
|
|
|
|
; negative case, X + 1 <=(s) Y !==> X <=(s) Y (X = 0x7fffffff, Y = 0x80000000)
|
|
define i1 @test_sge_icmp_no_nsw(i32 %length.i, i32 %i) {
|
|
; CHECK-LABEL: @test_sge_icmp_no_nsw(
|
|
; CHECK-NEXT: [[IPLUS1:%.*]] = add i32 [[I:%.*]], 1
|
|
; CHECK-NEXT: [[VAR29:%.*]] = icmp sge i32 [[LENGTH_I:%.*]], [[I]]
|
|
; CHECK-NEXT: [[VAR30:%.*]] = icmp sge i32 [[LENGTH_I]], [[IPLUS1]]
|
|
; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[VAR30]], [[VAR29]]
|
|
; CHECK-NEXT: ret i1 [[RES]]
|
|
;
|
|
%iplus1 = add i32 %i, 1
|
|
%var29 = icmp sge i32 %length.i, %i
|
|
%var30 = icmp sge i32 %length.i, %iplus1
|
|
%res = icmp ule i1 %var30, %var29
|
|
ret i1 %res
|
|
}
|
|
|
|
; negative case, X +_{nuw} 1 <=(s) Y !==> X <=(s) Y
|
|
define i1 @test_sge_icmp_nuw(i32 %length.i, i32 %i) {
|
|
; CHECK-LABEL: @test_sge_icmp_nuw(
|
|
; CHECK-NEXT: [[IPLUS1:%.*]] = add nuw i32 [[I:%.*]], 1
|
|
; CHECK-NEXT: [[VAR29:%.*]] = icmp sge i32 [[I]], [[LENGTH_I:%.*]]
|
|
; CHECK-NEXT: [[VAR30:%.*]] = icmp sge i32 [[IPLUS1]], [[LENGTH_I]]
|
|
; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[VAR30]], [[VAR29]]
|
|
; CHECK-NEXT: ret i1 [[RES]]
|
|
;
|
|
%iplus1 = add nuw i32 %i, 1
|
|
%var29 = icmp sge i32 %i, %length.i
|
|
%var30 = icmp sge i32 %iplus1, %length.i
|
|
%res = icmp ule i1 %var30, %var29
|
|
ret i1 %res
|
|
}
|
|
|
|
;negative case, X + 1 <(u) Y !==> X <(u) Y (X = Y = 0xffffffff)
|
|
define i1 @test_ugt_icmp_no_nuw(i32 %length.i, i32 %i) {
|
|
; CHECK-LABEL: @test_ugt_icmp_no_nuw(
|
|
; CHECK-NEXT: [[IPLUS1:%.*]] = add i32 [[I:%.*]], 1
|
|
; CHECK-NEXT: [[VAR29:%.*]] = icmp ugt i32 [[LENGTH_I:%.*]], [[I]]
|
|
; CHECK-NEXT: [[VAR30:%.*]] = icmp ugt i32 [[LENGTH_I]], [[IPLUS1]]
|
|
; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[VAR30]], [[VAR29]]
|
|
; CHECK-NEXT: ret i1 [[RES]]
|
|
;
|
|
%iplus1 = add i32 %i, 1
|
|
%var29 = icmp ugt i32 %length.i, %i
|
|
%var30 = icmp ugt i32 %length.i, %iplus1
|
|
%res = icmp ule i1 %var30, %var29
|
|
ret i1 %res
|
|
}
|
|
|
|
; negative case, X +_{nsw} 1 <(u) Y !==> X <(u) Y (X = 0xffffffff, Y = 0xfffffffe)
|
|
define i1 @test_ugt_icmp_nsw(i32 %length.i, i32 %i) {
|
|
; CHECK-LABEL: @test_ugt_icmp_nsw(
|
|
; CHECK-NEXT: [[IPLUS1:%.*]] = add nsw i32 [[I:%.*]], 1
|
|
; CHECK-NEXT: [[VAR29:%.*]] = icmp ugt i32 [[LENGTH_I:%.*]], [[I]]
|
|
; CHECK-NEXT: [[VAR30:%.*]] = icmp ugt i32 [[LENGTH_I]], [[IPLUS1]]
|
|
; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[VAR30]], [[VAR29]]
|
|
; CHECK-NEXT: ret i1 [[RES]]
|
|
;
|
|
%iplus1 = add nsw i32 %i, 1
|
|
%var29 = icmp ugt i32 %length.i, %i
|
|
%var30 = icmp ugt i32 %length.i, %iplus1
|
|
%res = icmp ule i1 %var30, %var29
|
|
ret i1 %res
|
|
}
|
|
|
|
; negative case, X + 1 <=(u) Y !==> X <=(u) Y (X = 0xffffffff, Y = 0x0)
|
|
define i1 @test_uge_icmp_no_nuw(i32 %length.i, i32 %i) {
|
|
; CHECK-LABEL: @test_uge_icmp_no_nuw(
|
|
; CHECK-NEXT: [[IPLUS1:%.*]] = add i32 [[I:%.*]], 1
|
|
; CHECK-NEXT: [[VAR29:%.*]] = icmp uge i32 [[LENGTH_I:%.*]], [[I]]
|
|
; CHECK-NEXT: [[VAR30:%.*]] = icmp uge i32 [[LENGTH_I]], [[IPLUS1]]
|
|
; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[VAR30]], [[VAR29]]
|
|
; CHECK-NEXT: ret i1 [[RES]]
|
|
;
|
|
%iplus1 = add i32 %i, 1
|
|
%var29 = icmp uge i32 %length.i, %i
|
|
%var30 = icmp uge i32 %length.i, %iplus1
|
|
%res = icmp ule i1 %var30, %var29
|
|
ret i1 %res
|
|
}
|
|
|
|
; negative case, X +_{nsw} 1 <=(u) Y !==> X <=(u) Y
|
|
define i1 @test_uge_icmp_nsw(i32 %length.i, i32 %i) {
|
|
; CHECK-LABEL: @test_uge_icmp_nsw(
|
|
; CHECK-NEXT: [[IPLUS1:%.*]] = add nsw i32 [[I:%.*]], 1
|
|
; CHECK-NEXT: [[VAR29:%.*]] = icmp uge i32 [[I]], [[LENGTH_I:%.*]]
|
|
; CHECK-NEXT: [[VAR30:%.*]] = icmp uge i32 [[IPLUS1]], [[LENGTH_I]]
|
|
; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[VAR30]], [[VAR29]]
|
|
; CHECK-NEXT: ret i1 [[RES]]
|
|
;
|
|
%iplus1 = add nsw i32 %i, 1
|
|
%var29 = icmp uge i32 %i, %length.i
|
|
%var30 = icmp uge i32 %iplus1, %length.i
|
|
%res = icmp ule i1 %var30, %var29
|
|
ret i1 %res
|
|
}
|
|
|
|
; (X >> Z) <=(u) Y ==> X <=(u) Y
|
|
define i1 @test_shift(i64 %x, i64 %y, i64 %shift) {
|
|
; CHECK-LABEL: @test_shift(
|
|
; CHECK-NEXT: [[LSHR:%.*]] = lshr i64 [[X:%.*]], [[SHIFT:%.*]]
|
|
; CHECK-NEXT: [[ICMP1:%.*]] = icmp ugt i64 [[LSHR]], [[Y:%.*]]
|
|
; CHECK-NEXT: call void @llvm.assume(i1 [[ICMP1]])
|
|
; CHECK-NEXT: ret i1 true
|
|
;
|
|
%lshr = lshr i64 %x, %shift
|
|
%icmp1 = icmp ugt i64 %lshr, %y
|
|
%icmp2 = icmp ugt i64 %x, %y
|
|
call void @llvm.assume(i1 %icmp1)
|
|
ret i1 %icmp2
|
|
}
|
|
|
|
; (X > Y +_{nuw} 1) ==> X != Y
|
|
define i1 @assume_x_ugt_y_plus_1(i64 %x, i64 %y) {
|
|
; CHECK-LABEL: @assume_x_ugt_y_plus_1(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = add nuw i64 [[Y:%.*]], 1
|
|
; CHECK-NEXT: [[TMP2:%.*]] = icmp ugt i64 [[X:%.*]], [[TMP1]]
|
|
; CHECK-NEXT: tail call void @llvm.assume(i1 [[TMP2]])
|
|
; CHECK-NEXT: [[TMP3:%.*]] = icmp eq i64 [[X]], [[Y]]
|
|
; CHECK-NEXT: ret i1 [[TMP3]]
|
|
;
|
|
%1 = add nuw i64 %y, 1
|
|
%2 = icmp ugt i64 %x, %1
|
|
tail call void @llvm.assume(i1 %2)
|
|
%3 = icmp eq i64 %x, %y
|
|
ret i1 %3
|
|
}
|
|
|
|
; i <u L ==> i >> C <u L
|
|
define i1 @lshr_constant(i32 %length.i, i32 %i) {
|
|
; CHECK-LABEL: @lshr_constant(
|
|
; CHECK-NEXT: ret i1 true
|
|
;
|
|
%shl = lshr i32 %i, 1
|
|
%var29 = icmp ult i32 %i, %length.i
|
|
%var30 = icmp ult i32 %shl, %length.i
|
|
%res = icmp ule i1 %var29, %var30
|
|
ret i1 %res
|
|
}
|
|
|
|
; i <u L ==> i >> V <u L
|
|
define i1 @lshr_value(i32 %length.i, i32 %i, i32 %v) {
|
|
; CHECK-LABEL: @lshr_value(
|
|
; CHECK-NEXT: ret i1 true
|
|
;
|
|
%shl = lshr i32 %i, %v
|
|
%var29 = icmp ult i32 %i, %length.i
|
|
%var30 = icmp ult i32 %shl, %length.i
|
|
%res = icmp ule i1 %var29, %var30
|
|
ret i1 %res
|
|
}
|
|
|
|
define i1 @same_ops_with_constant(i8 %x) {
|
|
; CHECK-LABEL: @same_ops_with_constant(
|
|
; CHECK-NEXT: ret i1 true
|
|
;
|
|
%cmp1 = icmp sgt i8 %x, 5
|
|
%cmp2 = icmp ugt i8 %x, 5
|
|
%res = icmp ule i1 %cmp1, %cmp2
|
|
ret i1 %res
|
|
}
|
|
|
|
define i1 @same_ops_with_constant_wrong_sign(i8 %x) {
|
|
; CHECK-LABEL: @same_ops_with_constant_wrong_sign(
|
|
; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 [[X:%.*]], -5
|
|
; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i8 [[X]], -5
|
|
; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[CMP1]], [[CMP2]]
|
|
; CHECK-NEXT: ret i1 [[RES]]
|
|
;
|
|
%cmp1 = icmp sgt i8 %x, -5
|
|
%cmp2 = icmp ugt i8 %x, -5
|
|
%res = icmp ule i1 %cmp1, %cmp2
|
|
ret i1 %res
|
|
}
|
|
|
|
declare void @llvm.assume(i1)
|