; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes
; RUN: opt -passes=function-attrs --aa-pipeline=basic-aa --disable-nofree-inference=false -S < %s | FileCheck %s --check-prefix=FNATTR
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
; Test cases specifically designed for the "nofree" function attribute.
; We use FIXME's to indicate problems and missing attributes.
; Free functions
declare void @free(ptr nocapture) local_unnamed_addr #1
declare noalias ptr @realloc(ptr nocapture, i64) local_unnamed_addr #0
declare void @_ZdaPv(ptr) local_unnamed_addr #2
; TEST 1 (positive case)
define void @only_return() #0 {
; FNATTR: Function Attrs: mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) uwtable
; FNATTR-LABEL: define {{[^@]+}}@only_return
; FNATTR-SAME: () #[[ATTR3:[0-9]+]] {
; FNATTR-NEXT: ret void
;
ret void
}
; TEST 2 (negative case)
; Only free
; void only_free(char* p) {
; free(p);
; }
define void @only_free(ptr nocapture %0) local_unnamed_addr #0 {
; FNATTR: Function Attrs: noinline nounwind uwtable
; FNATTR-LABEL: define {{[^@]+}}@only_free
; FNATTR-SAME: (ptr nocapture [[TMP0:%.*]]) local_unnamed_addr #[[ATTR1:[0-9]+]] {
; FNATTR-NEXT: tail call void @free(ptr [[TMP0]]) #[[ATTR0:[0-9]+]]
; FNATTR-NEXT: ret void
;
tail call void @free(ptr %0) #1
ret void
}
; TEST 3 (negative case)
; Free occurs in same scc.
; void free_in_scc1(char*p){
; free_in_scc2(p);
; }
; void free_in_scc2(char*p){
; free_in_scc1(p);
; free(p);
; }
define void @free_in_scc1(ptr nocapture %0) local_unnamed_addr #0 {
; FNATTR: Function Attrs: noinline nounwind uwtable
; FNATTR-LABEL: define {{[^@]+}}@free_in_scc1
; FNATTR-SAME: (ptr nocapture [[TMP0:%.*]]) local_unnamed_addr #[[ATTR1]] {
; FNATTR-NEXT: tail call void @free_in_scc2(ptr [[TMP0]]) #[[ATTR0]]
; FNATTR-NEXT: ret void
;
tail call void @free_in_scc2(ptr %0) #1
ret void
}
define void @free_in_scc2(ptr nocapture %0) local_unnamed_addr #0 {
; FNATTR: Function Attrs: noinline nounwind uwtable
; FNATTR-LABEL: define {{[^@]+}}@free_in_scc2
; FNATTR-SAME: (ptr nocapture [[TMP0:%.*]]) local_unnamed_addr #[[ATTR1]] {
; FNATTR-NEXT: [[CMP:%.*]] = icmp eq ptr [[TMP0]], null
; FNATTR-NEXT: br i1 [[CMP]], label [[REC:%.*]], label [[CALL:%.*]]
; FNATTR: call:
; FNATTR-NEXT: tail call void @free(ptr [[TMP0]]) #[[ATTR0]]
; FNATTR-NEXT: br label [[END:%.*]]
; FNATTR: rec:
; FNATTR-NEXT: tail call void @free_in_scc1(ptr [[TMP0]])
; FNATTR-NEXT: br label [[END]]
; FNATTR: end:
; FNATTR-NEXT: ret void
;
%cmp = icmp eq ptr %0, null
br i1 %cmp, label %rec, label %call
call:
tail call void @free(ptr %0) #1
br label %end
rec:
tail call void @free_in_scc1(ptr %0)
br label %end
end:
ret void
}
; TEST 4 (positive case)
; Free doesn't occur.
; void mutual_recursion1(){
; mutual_recursion2();
; }
; void mutual_recursion2(){
; mutual_recursion1();
; }
define void @mutual_recursion1() #0 {
; FNATTR: Function Attrs: nofree noinline nosync nounwind memory(none) uwtable
; FNATTR-LABEL: define {{[^@]+}}@mutual_recursion1
; FNATTR-SAME: () #[[ATTR4:[0-9]+]] {
; FNATTR-NEXT: call void @mutual_recursion2()
; FNATTR-NEXT: ret void
;
call void @mutual_recursion2()
ret void
}
define void @mutual_recursion2() #0 {
; FNATTR: Function Attrs: nofree noinline nosync nounwind memory(none) uwtable
; FNATTR-LABEL: define {{[^@]+}}@mutual_recursion2
; FNATTR-SAME: () #[[ATTR4]] {
; FNATTR-NEXT: call void @mutual_recursion1()
; FNATTR-NEXT: ret void
;
call void @mutual_recursion1()
ret void
}
; TEST 5
; C++ delete operation (negative case)
; void delete_op (char p[]){
; delete [] p;
; }
define void @_Z9delete_opPc(ptr %0) local_unnamed_addr #0 {
; FNATTR: Function Attrs: noinline nounwind uwtable
; FNATTR-LABEL: define {{[^@]+}}@_Z9delete_opPc
; FNATTR-SAME: (ptr [[TMP0:%.*]]) local_unnamed_addr #[[ATTR1]] {
; FNATTR-NEXT: [[TMP2:%.*]] = icmp eq ptr [[TMP0]], null
; FNATTR-NEXT: br i1 [[TMP2]], label [[TMP4:%.*]], label [[TMP3:%.*]]
; FNATTR: 3:
; FNATTR-NEXT: tail call void @_ZdaPv(ptr nonnull [[TMP0]]) #[[ATTR2:[0-9]+]]
; FNATTR-NEXT: br label [[TMP4]]
; FNATTR: 4:
; FNATTR-NEXT: ret void
;
%2 = icmp eq ptr %0, null
br i1 %2, label %4, label %3
; <label>:3: ; preds = %1
tail call void @_ZdaPv(ptr nonnull %0) #2
br label %4
; <label>:4: ; preds = %3, %1
ret void
}
; TEST 6 (negative case)
; Call realloc
define noalias ptr @call_realloc(ptr nocapture %0, i64 %1) local_unnamed_addr #0 {
; FNATTR: Function Attrs: noinline nounwind uwtable
; FNATTR-LABEL: define {{[^@]+}}@call_realloc
; FNATTR-SAME: (ptr nocapture [[TMP0:%.*]], i64 [[TMP1:%.*]]) local_unnamed_addr #[[ATTR1]] {
; FNATTR-NEXT: [[RET:%.*]] = tail call ptr @realloc(ptr [[TMP0]], i64 [[TMP1]]) #[[ATTR2]]
; FNATTR-NEXT: ret ptr [[RET]]
;
%ret = tail call ptr @realloc(ptr %0, i64 %1) #2
ret ptr %ret
}
; TEST 7 (positive case)
; Call function declaration with "nofree"
declare void @nofree_function() nofree readnone #0
define void @call_nofree_function() #0 {
; FNATTR: Function Attrs: nofree noinline nosync nounwind memory(none) uwtable
; FNATTR-LABEL: define {{[^@]+}}@call_nofree_function
; FNATTR-SAME: () #[[ATTR4]] {
; FNATTR-NEXT: tail call void @nofree_function()
; FNATTR-NEXT: ret void
;
tail call void @nofree_function()
ret void
}
; TEST 8 (negative case)
; Call function declaration without "nofree"
declare void @maybe_free() #0
define void @call_maybe_free() #0 {
; FNATTR: Function Attrs: noinline nounwind uwtable
; FNATTR-LABEL: define {{[^@]+}}@call_maybe_free
; FNATTR-SAME: () #[[ATTR1]] {
; FNATTR-NEXT: tail call void @maybe_free()
; FNATTR-NEXT: ret void
;
tail call void @maybe_free()
ret void
}
; TEST 9 (negative case)
; Call both of above functions
define void @call_both() #0 {
; FNATTR: Function Attrs: noinline nounwind uwtable
; FNATTR-LABEL: define {{[^@]+}}@call_both
; FNATTR-SAME: () #[[ATTR1]] {
; FNATTR-NEXT: tail call void @maybe_free()
; FNATTR-NEXT: tail call void @nofree_function()
; FNATTR-NEXT: ret void
;
tail call void @maybe_free()
tail call void @nofree_function()
ret void
}
; TEST 10 (positive case)
; Call intrinsic function
declare float @llvm.floor.f32(float)
define void @call_floor(float %a) #0 {
; FNATTR: Function Attrs: mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) uwtable
; FNATTR-LABEL: define {{[^@]+}}@call_floor
; FNATTR-SAME: (float [[A:%.*]]) #[[ATTR3]] {
; FNATTR-NEXT: [[TMP1:%.*]] = tail call float @llvm.floor.f32(float [[A]])
; FNATTR-NEXT: ret void
;
tail call float @llvm.floor.f32(float %a)
ret void
}
; TEST 11 (positive case)
; Check propagation.
define void @f1() #0 {
; FNATTR: Function Attrs: nofree noinline nosync nounwind memory(none) uwtable
; FNATTR-LABEL: define {{[^@]+}}@f1
; FNATTR-SAME: () #[[ATTR4]] {
; FNATTR-NEXT: tail call void @nofree_function()
; FNATTR-NEXT: ret void
;
tail call void @nofree_function()
ret void
}
define void @f2() #0 {
; FNATTR: Function Attrs: nofree noinline nosync nounwind memory(none) uwtable
; FNATTR-LABEL: define {{[^@]+}}@f2
; FNATTR-SAME: () #[[ATTR4]] {
; FNATTR-NEXT: tail call void @f1()
; FNATTR-NEXT: ret void
;
tail call void @f1()
ret void
}
declare noalias ptr @malloc(i64)
attributes #0 = { nounwind uwtable noinline }
attributes #1 = { nounwind }
attributes #2 = { nobuiltin nounwind }
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