258 lines
7.6 KiB
LLVM
258 lines
7.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by update_test_checks.py
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; RUN: opt -S %s -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: 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: 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: [[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: [[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: [[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: 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: 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: 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: [[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: 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: 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: 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: 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 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 @test11(i32 %length.i, i32 %x) {
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; CHECK-LABEL: @test11(
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; CHECK: [[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: [[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: 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: 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 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 @test15(i32 %length.i, i32 %x) {
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; CHECK-LABEL: @test15(
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; CHECK: [[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: 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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