1; RUN: opt -instcombine -S < %s | FileCheck %s --dump-input-on-failure 2 3target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 4target triple = "x86_64-apple-macosx10.14.0" 5 6; Function Attrs: nounwind ssp uwtable 7define i64 @weird_identity_but_ok(i64 %sz) { 8entry: 9 %call = tail call i8* @malloc(i64 %sz) 10 %calc_size = tail call i64 @llvm.objectsize.i64.p0i8(i8* %call, i1 false, i1 true, i1 true) 11 tail call void @free(i8* %call) 12 ret i64 %calc_size 13} 14 15; CHECK: define i64 @weird_identity_but_ok(i64 %sz) 16; CHECK-NEXT: entry: 17; CHECK-NEXT: ret i64 %sz 18; CHECK-NEXT: } 19 20define i64 @phis_are_neat(i1 %which) { 21entry: 22 br i1 %which, label %first_label, label %second_label 23 24first_label: 25 %first_call = call i8* @malloc(i64 10) 26 br label %join_label 27 28second_label: 29 %second_call = call i8* @malloc(i64 30) 30 br label %join_label 31 32join_label: 33 %joined = phi i8* [ %first_call, %first_label ], [ %second_call, %second_label ] 34 %calc_size = tail call i64 @llvm.objectsize.i64.p0i8(i8* %joined, i1 false, i1 true, i1 true) 35 ret i64 %calc_size 36} 37 38; CHECK: %0 = phi i64 [ 10, %first_label ], [ 30, %second_label ] 39; CHECK-NEXT: ret i64 %0 40 41define i64 @internal_pointer(i64 %sz) { 42entry: 43 %ptr = call i8* @malloc(i64 %sz) 44 %ptr2 = getelementptr inbounds i8, i8* %ptr, i32 2 45 %calc_size = call i64 @llvm.objectsize.i64.p0i8(i8* %ptr2, i1 false, i1 true, i1 true) 46 ret i64 %calc_size 47} 48 49; CHECK: define i64 @internal_pointer(i64 %sz) 50; CHECK-NEXT: entry: 51; CHECK-NEXT: %0 = add i64 %sz, -2 52; CHECK-NEXT: %1 = icmp ult i64 %sz, 2 53; CHECK-NEXT: %2 = select i1 %1, i64 0, i64 %0 54; CHECK-NEXT: ret i64 %2 55; CHECK-NEXT: } 56 57define i64 @uses_nullptr_no_fold() { 58entry: 59 %res = call i64 @llvm.objectsize.i64.p0i8(i8* null, i1 false, i1 true, i1 true) 60 ret i64 %res 61} 62 63; CHECK: %res = call i64 @llvm.objectsize.i64.p0i8(i8* null, i1 false, i1 true, i1 true) 64 65define i64 @uses_nullptr_fold() { 66entry: 67 ; NOTE: the third parameter to this call is false, unlike above. 68 %res = call i64 @llvm.objectsize.i64.p0i8(i8* null, i1 false, i1 false, i1 true) 69 ret i64 %res 70} 71 72; CHECK: ret i64 0 73 74@d = common global i8 0, align 1 75@c = common global i32 0, align 4 76 77; Function Attrs: nounwind 78define void @f() { 79entry: 80 %.pr = load i32, i32* @c, align 4 81 %tobool4 = icmp eq i32 %.pr, 0 82 br i1 %tobool4, label %for.end, label %for.body 83 84for.body: ; preds = %entry, %for.body 85 %dp.05 = phi i8* [ %add.ptr, %for.body ], [ @d, %entry ] 86 %0 = tail call i64 @llvm.objectsize.i64.p0i8(i8* %dp.05, i1 false, i1 true, i1 true) 87 %conv = trunc i64 %0 to i32 88 tail call void @bury(i32 %conv) #3 89 %1 = load i32, i32* @c, align 4 90 %idx.ext = sext i32 %1 to i64 91 %add.ptr.offs = add i64 %idx.ext, 0 92 %2 = add i64 undef, %add.ptr.offs 93 %add.ptr = getelementptr inbounds i8, i8* %dp.05, i64 %idx.ext 94 %add = shl nsw i32 %1, 1 95 store i32 %add, i32* @c, align 4 96 %tobool = icmp eq i32 %1, 0 97 br i1 %tobool, label %for.end, label %for.body 98 99for.end: ; preds = %for.body, %entry 100 ret void 101} 102 103; CHECK: define void @f() 104; CHECK: call i64 @llvm.objectsize.i64.p0i8( 105 106declare void @bury(i32) local_unnamed_addr #2 107 108; Function Attrs: nounwind allocsize(0) 109declare i8* @malloc(i64) 110 111declare i8* @get_unknown_buffer() 112 113; Function Attrs: nounwind 114declare void @free(i8* nocapture) 115 116; Function Attrs: nounwind readnone speculatable 117declare i64 @llvm.objectsize.i64.p0i8(i8*, i1, i1, i1) 118