llvm/test/Transforms/Attributor/IPConstantProp/pthreads.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes --check-globals
; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal  -attributor-annotate-decl-cs  -S < %s | FileCheck %s --check-prefixes=CHECK,TUNIT
; RUN: opt -aa-pipeline=basic-aa -passes=attributor-cgscc -attributor-manifest-internal  -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,CGSCC
;
;    #include <pthread.h>
;
;    ptr GlobalVPtr;
;
;    static ptr foo(ptr arg) { return arg; }
;    static ptr bar(ptr arg) { return arg; }
;
;    int main() {
;      pthread_t thread;
;      pthread_create(&thread, NULL, foo, NULL);
;      pthread_create(&thread, NULL, bar, &GlobalVPtr);
;      return 0;
;    }
;
; Verify the constant values NULL and &GlobalVPtr are propagated into foo and
; bar, respectively.
;
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"

%union.pthread_attr_t = type { i64, [48 x i8] }

@GlobalVPtr = common dso_local global ptr null, align 8

; FIXME: nocapture & noalias for @GlobalVPtr in %call1
; FIXME: nocapture & noalias for %alloc2 in %call3

;.
; CHECK: @GlobalVPtr = common dso_local global ptr null, align 8
;.
define dso_local i32 @main() {
; TUNIT-LABEL: define {{[^@]+}}@main() {
; TUNIT-NEXT:  entry:
; TUNIT-NEXT:    [[ALLOC1:%.*]] = alloca i8, align 8
; TUNIT-NEXT:    [[ALLOC2:%.*]] = alloca i8, align 8
; TUNIT-NEXT:    [[THREAD:%.*]] = alloca i64, align 8
; TUNIT-NEXT:    [[CALL:%.*]] = call i32 @pthread_create(ptr noundef nonnull align 8 dereferenceable(8) [[THREAD]], ptr noundef align 4294967296 null, ptr noundef nonnull @foo, ptr nofree readnone align 4294967296 undef)
; TUNIT-NEXT:    [[CALL1:%.*]] = call i32 @pthread_create(ptr noundef nonnull align 8 dereferenceable(8) [[THREAD]], ptr noundef align 4294967296 null, ptr noundef nonnull @bar, ptr noalias nocapture nofree nonnull readnone align 8 dereferenceable(8) undef)
; TUNIT-NEXT:    [[CALL2:%.*]] = call i32 @pthread_create(ptr noundef nonnull align 8 dereferenceable(8) [[THREAD]], ptr noundef align 4294967296 null, ptr noundef nonnull @baz, ptr noalias nocapture nofree noundef nonnull readnone align 8 dereferenceable(1) [[ALLOC1]])
; TUNIT-NEXT:    [[CALL3:%.*]] = call i32 @pthread_create(ptr noundef nonnull align 8 dereferenceable(8) [[THREAD]], ptr noundef align 4294967296 null, ptr noundef nonnull @buz, ptr noalias nofree noundef nonnull readnone align 8 dereferenceable(1) "no-capture-maybe-returned" [[ALLOC2]])
; TUNIT-NEXT:    ret i32 0
;
; CGSCC-LABEL: define {{[^@]+}}@main() {
; CGSCC-NEXT:  entry:
; CGSCC-NEXT:    [[ALLOC1:%.*]] = alloca i8, align 8
; CGSCC-NEXT:    [[ALLOC2:%.*]] = alloca i8, align 8
; CGSCC-NEXT:    [[THREAD:%.*]] = alloca i64, align 8
; CGSCC-NEXT:    [[CALL:%.*]] = call i32 @pthread_create(ptr noundef nonnull align 8 dereferenceable(8) [[THREAD]], ptr noundef align 4294967296 null, ptr noundef nonnull @foo, ptr nofree noundef readnone align 4294967296 null)
; CGSCC-NEXT:    [[CALL1:%.*]] = call i32 @pthread_create(ptr noundef nonnull align 8 dereferenceable(8) [[THREAD]], ptr noundef align 4294967296 null, ptr noundef nonnull @bar, ptr noalias nocapture nofree noundef nonnull readnone align 8 dereferenceable(8) @GlobalVPtr)
; CGSCC-NEXT:    [[CALL2:%.*]] = call i32 @pthread_create(ptr noundef nonnull align 8 dereferenceable(8) [[THREAD]], ptr noundef align 4294967296 null, ptr noundef nonnull @baz, ptr noalias nocapture nofree noundef nonnull readnone align 8 dereferenceable(1) [[ALLOC1]])
; CGSCC-NEXT:    [[CALL3:%.*]] = call i32 @pthread_create(ptr noundef nonnull align 8 dereferenceable(8) [[THREAD]], ptr noundef align 4294967296 null, ptr noundef nonnull @buz, ptr noalias nofree noundef nonnull readnone align 8 dereferenceable(1) [[ALLOC2]])
; CGSCC-NEXT:    ret i32 0
;
entry:
  %alloc1 = alloca i8, align 8
  %alloc2 = alloca i8, align 8
  %thread = alloca i64, align 8
  %call = call i32 @pthread_create(ptr nonnull %thread, ptr null, ptr nonnull @foo, ptr null)
  %call1 = call i32 @pthread_create(ptr nonnull %thread, ptr null, ptr nonnull @bar, ptr @GlobalVPtr)
  %call2 = call i32 @pthread_create(ptr nonnull %thread, ptr null, ptr nonnull @baz, ptr nocapture %alloc1)
  %call3 = call i32 @pthread_create(ptr nonnull %thread, ptr null, ptr nonnull @buz, ptr %alloc2)
  ret i32 0
}

declare !callback !0 dso_local i32 @pthread_create(ptr, ptr, ptr, ptr)

define internal ptr @foo(ptr %arg) {
; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@foo
; CHECK-SAME: (ptr noalias nocapture nofree readnone align 4294967296 [[ARG:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    ret ptr null
;
entry:
  ret ptr %arg
}

define internal ptr @bar(ptr %arg) {
; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@bar
; CHECK-SAME: (ptr noalias nocapture nofree nonnull readnone align 8 dereferenceable(8) [[ARG:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    ret ptr @GlobalVPtr
;
entry:
  ret ptr %arg
}

define internal ptr @baz(ptr %arg) {
; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@baz
; CHECK-SAME: (ptr noalias nofree noundef nonnull readnone returned align 8 dereferenceable(1) "no-capture-maybe-returned" [[ARG:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    ret ptr [[ARG]]
;
entry:
  ret ptr %arg
}

define internal ptr @buz(ptr %arg) {
; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@buz
; CHECK-SAME: (ptr noalias nofree noundef nonnull readnone returned align 8 dereferenceable(1) "no-capture-maybe-returned" [[ARG:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    ret ptr [[ARG]]
;
entry:
  ret ptr %arg
}

!1 = !{i64 2, i64 3, i1 false}
!0 = !{!1}
;.
; TUNIT: attributes #[[ATTR0]] = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) }
;.
; CGSCC: attributes #[[ATTR0]] = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) }
;.
; TUNIT: [[META0:![0-9]+]] = !{[[META1:![0-9]+]]}
; TUNIT: [[META1]] = !{i64 2, i64 3, i1 false}
;.
; CGSCC: [[META0:![0-9]+]] = !{[[META1:![0-9]+]]}
; CGSCC: [[META1]] = !{i64 2, i64 3, i1 false}
;.