[llvm] r317201 - Allow inaccessiblememonly and inaccessiblemem_or_argmemonly to be overwriten on call site with operand bundle
Yichao Yu via llvm-commits
llvm-commits at lists.llvm.org
Thu Nov 2 05:18:33 PDT 2017
Author: yuyichao
Date: Thu Nov 2 05:18:33 2017
New Revision: 317201
URL: http://llvm.org/viewvc/llvm-project?rev=317201&view=rev
Log:
Allow inaccessiblememonly and inaccessiblemem_or_argmemonly to be overwriten on call site with operand bundle
Summary:
Similar to argmemonly, readonly and readnone.
Fix PR35128
Reviewers: andrew.w.kaylor, chandlerc, hfinkel
Reviewed By: hfinkel
Subscribers: hfinkel, llvm-commits
Differential Revision: https://reviews.llvm.org/D39434
Modified:
llvm/trunk/include/llvm/IR/CallSite.h
llvm/trunk/include/llvm/IR/InstrTypes.h
llvm/trunk/include/llvm/IR/Instructions.h
llvm/trunk/lib/Analysis/BasicAliasAnalysis.cpp
llvm/trunk/test/Analysis/BasicAA/cs-cs.ll
Modified: llvm/trunk/include/llvm/IR/CallSite.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/IR/CallSite.h?rev=317201&r1=317200&r2=317201&view=diff
==============================================================================
--- llvm/trunk/include/llvm/IR/CallSite.h (original)
+++ llvm/trunk/include/llvm/IR/CallSite.h Thu Nov 2 05:18:33 2017
@@ -475,6 +475,24 @@ public:
CALLSITE_DELEGATE_SETTER(setOnlyAccessesArgMemory());
}
+ /// Determine if the function may only access memory that is
+ /// inaccessible from the IR.
+ bool onlyAccessesInaccessibleMemory() const {
+ CALLSITE_DELEGATE_GETTER(onlyAccessesInaccessibleMemory());
+ }
+ void setOnlyAccessesInaccessibleMemory() {
+ CALLSITE_DELEGATE_SETTER(setOnlyAccessesInaccessibleMemory());
+ }
+
+ /// Determine if the function may only access memory that is
+ /// either inaccessible from the IR or pointed to by its arguments.
+ bool onlyAccessesInaccessibleMemOrArgMem() const {
+ CALLSITE_DELEGATE_GETTER(onlyAccessesInaccessibleMemOrArgMem());
+ }
+ void setOnlyAccessesInaccessibleMemOrArgMem() {
+ CALLSITE_DELEGATE_SETTER(setOnlyAccessesInaccessibleMemOrArgMem());
+ }
+
/// Determine if the call cannot return.
bool doesNotReturn() const {
CALLSITE_DELEGATE_GETTER(doesNotReturn());
Modified: llvm/trunk/include/llvm/IR/InstrTypes.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/IR/InstrTypes.h?rev=317201&r1=317200&r2=317201&view=diff
==============================================================================
--- llvm/trunk/include/llvm/IR/InstrTypes.h (original)
+++ llvm/trunk/include/llvm/IR/InstrTypes.h Thu Nov 2 05:18:33 2017
@@ -1480,6 +1480,12 @@ protected:
default:
return false;
+ case Attribute::InaccessibleMemOrArgMemOnly:
+ return hasReadingOperandBundles();
+
+ case Attribute::InaccessibleMemOnly:
+ return hasReadingOperandBundles();
+
case Attribute::ArgMemOnly:
return hasReadingOperandBundles();
Modified: llvm/trunk/include/llvm/IR/Instructions.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/IR/Instructions.h?rev=317201&r1=317200&r2=317201&view=diff
==============================================================================
--- llvm/trunk/include/llvm/IR/Instructions.h (original)
+++ llvm/trunk/include/llvm/IR/Instructions.h Thu Nov 2 05:18:33 2017
@@ -1807,6 +1807,24 @@ public:
addAttribute(AttributeList::FunctionIndex, Attribute::ArgMemOnly);
}
+ /// @brief Determine if the function may only access memory that is
+ /// inaccessible from the IR.
+ bool onlyAccessesInaccessibleMemory() const {
+ return hasFnAttr(Attribute::InaccessibleMemOnly);
+ }
+ void setOnlyAccessesInaccessibleMemory() {
+ addAttribute(AttributeList::FunctionIndex, Attribute::InaccessibleMemOnly);
+ }
+
+ /// @brief Determine if the function may only access memory that is
+ /// either inaccessible from the IR or pointed to by its arguments.
+ bool onlyAccessesInaccessibleMemOrArgMem() const {
+ return hasFnAttr(Attribute::InaccessibleMemOrArgMemOnly);
+ }
+ void setOnlyAccessesInaccessibleMemOrArgMem() {
+ addAttribute(AttributeList::FunctionIndex, Attribute::InaccessibleMemOrArgMemOnly);
+ }
+
/// Determine if the call cannot return.
bool doesNotReturn() const { return hasFnAttr(Attribute::NoReturn); }
void setDoesNotReturn() {
@@ -3889,6 +3907,24 @@ public:
addAttribute(AttributeList::FunctionIndex, Attribute::ArgMemOnly);
}
+ /// @brief Determine if the function may only access memory that is
+ /// inaccessible from the IR.
+ bool onlyAccessesInaccessibleMemory() const {
+ return hasFnAttr(Attribute::InaccessibleMemOnly);
+ }
+ void setOnlyAccessesInaccessibleMemory() {
+ addAttribute(AttributeList::FunctionIndex, Attribute::InaccessibleMemOnly);
+ }
+
+ /// @brief Determine if the function may only access memory that is
+ /// either inaccessible from the IR or pointed to by its arguments.
+ bool onlyAccessesInaccessibleMemOrArgMem() const {
+ return hasFnAttr(Attribute::InaccessibleMemOrArgMemOnly);
+ }
+ void setOnlyAccessesInaccessibleMemOrArgMem() {
+ addAttribute(AttributeList::FunctionIndex, Attribute::InaccessibleMemOrArgMemOnly);
+ }
+
/// Determine if the call cannot return.
bool doesNotReturn() const { return hasFnAttr(Attribute::NoReturn); }
void setDoesNotReturn() {
Modified: llvm/trunk/lib/Analysis/BasicAliasAnalysis.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/BasicAliasAnalysis.cpp?rev=317201&r1=317200&r2=317201&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/BasicAliasAnalysis.cpp (original)
+++ llvm/trunk/lib/Analysis/BasicAliasAnalysis.cpp Thu Nov 2 05:18:33 2017
@@ -617,6 +617,10 @@ FunctionModRefBehavior BasicAAResult::ge
if (CS.onlyAccessesArgMemory())
Min = FunctionModRefBehavior(Min & FMRB_OnlyAccessesArgumentPointees);
+ else if (CS.onlyAccessesInaccessibleMemory())
+ Min = FunctionModRefBehavior(Min & FMRB_OnlyAccessesInaccessibleMem);
+ else if (CS.onlyAccessesInaccessibleMemOrArgMem())
+ Min = FunctionModRefBehavior(Min & FMRB_OnlyAccessesInaccessibleOrArgMem);
// If CS has operand bundles then aliasing attributes from the function it
// calls do not directly apply to the CallSite. This can be made more
Modified: llvm/trunk/test/Analysis/BasicAA/cs-cs.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Analysis/BasicAA/cs-cs.ll?rev=317201&r1=317200&r2=317201&view=diff
==============================================================================
--- llvm/trunk/test/Analysis/BasicAA/cs-cs.ll (original)
+++ llvm/trunk/test/Analysis/BasicAA/cs-cs.ll Thu Nov 2 05:18:33 2017
@@ -2,13 +2,13 @@
target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:32:64-v128:32:128-a0:0:32-n32"
target triple = "arm-apple-ios"
-declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
-declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
+declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i32, i1) #0
+declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i32, i1) #0
-declare void @a_readonly_func(i8 *) noinline nounwind readonly
-declare void @a_writeonly_func(i8 *) noinline nounwind writeonly
+declare void @a_readonly_func(i8*) #1
+declare void @a_writeonly_func(i8*) #2
-define void @test2(i8* %P, i8* %Q) nounwind ssp {
+define void @test2(i8* %P, i8* %Q) #3 {
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
ret void
@@ -24,7 +24,7 @@ define void @test2(i8* %P, i8* %Q) nounw
; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
}
-define void @test2a(i8* noalias %P, i8* noalias %Q) nounwind ssp {
+define void @test2a(i8* noalias %P, i8* noalias %Q) #3 {
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
ret void
@@ -40,7 +40,7 @@ define void @test2a(i8* noalias %P, i8*
; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
}
-define void @test2b(i8* noalias %P, i8* noalias %Q) nounwind ssp {
+define void @test2b(i8* noalias %P, i8* noalias %Q) #3 {
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
%R = getelementptr i8, i8* %P, i64 12
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i32 1, i1 false)
@@ -61,7 +61,7 @@ define void @test2b(i8* noalias %P, i8*
; CHECK: NoModRef: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i32 1, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
}
-define void @test2c(i8* noalias %P, i8* noalias %Q) nounwind ssp {
+define void @test2c(i8* noalias %P, i8* noalias %Q) #3 {
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
%R = getelementptr i8, i8* %P, i64 11
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i32 1, i1 false)
@@ -82,7 +82,7 @@ define void @test2c(i8* noalias %P, i8*
; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i32 1, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
}
-define void @test2d(i8* noalias %P, i8* noalias %Q) nounwind ssp {
+define void @test2d(i8* noalias %P, i8* noalias %Q) #3 {
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
%R = getelementptr i8, i8* %P, i64 -12
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i32 1, i1 false)
@@ -103,7 +103,7 @@ define void @test2d(i8* noalias %P, i8*
; CHECK: NoModRef: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i32 1, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
}
-define void @test2e(i8* noalias %P, i8* noalias %Q) nounwind ssp {
+define void @test2e(i8* noalias %P, i8* noalias %Q) #3 {
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
%R = getelementptr i8, i8* %P, i64 -11
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i32 1, i1 false)
@@ -124,7 +124,7 @@ define void @test2e(i8* noalias %P, i8*
; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %R, i8* %Q, i64 12, i32 1, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
}
-define void @test3(i8* %P, i8* %Q) nounwind ssp {
+define void @test3(i8* %P, i8* %Q) #3 {
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 8, i32 1, i1 false)
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
ret void
@@ -140,7 +140,7 @@ define void @test3(i8* %P, i8* %Q) nounw
; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 8, i32 1, i1 false)
}
-define void @test3a(i8* noalias %P, i8* noalias %Q) nounwind ssp {
+define void @test3a(i8* noalias %P, i8* noalias %Q) #3 {
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 8, i32 1, i1 false)
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
ret void
@@ -156,7 +156,7 @@ define void @test3a(i8* noalias %P, i8*
; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 8, i32 1, i1 false)
}
-define void @test4(i8* %P, i8* noalias %Q) nounwind ssp {
+define void @test4(i8* %P, i8* noalias %Q) #3 {
tail call void @llvm.memset.p0i8.i64(i8* %P, i8 42, i64 8, i32 1, i1 false)
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
ret void
@@ -172,7 +172,7 @@ define void @test4(i8* %P, i8* noalias %
; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false) <-> tail call void @llvm.memset.p0i8.i64(i8* %P, i8 42, i64 8, i32 1, i1 false)
}
-define void @test5(i8* %P, i8* %Q, i8* %R) nounwind ssp {
+define void @test5(i8* %P, i8* %Q, i8* %R) #3 {
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %R, i64 12, i32 1, i1 false)
ret void
@@ -192,7 +192,7 @@ define void @test5(i8* %P, i8* %Q, i8* %
; CHECK: Just Mod: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %R, i64 12, i32 1, i1 false) <-> tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false)
}
-define void @test6(i8* %P) nounwind ssp {
+define void @test6(i8* %P) #3 {
call void @llvm.memset.p0i8.i64(i8* %P, i8 -51, i64 32, i32 8, i1 false)
call void @a_readonly_func(i8* %P)
ret void
@@ -205,7 +205,7 @@ define void @test6(i8* %P) nounwind ssp
; CHECK: Just Ref: call void @a_readonly_func(i8* %P) <-> call void @llvm.memset.p0i8.i64(i8* %P, i8 -51, i64 32, i32 8, i1 false)
}
-define void @test7(i8* %P) nounwind ssp {
+define void @test7(i8* %P) #3 {
call void @a_writeonly_func(i8* %P)
call void @a_readonly_func(i8* %P)
ret void
@@ -218,9 +218,9 @@ define void @test7(i8* %P) nounwind ssp
; CHECK: Just Ref: call void @a_readonly_func(i8* %P) <-> call void @a_writeonly_func(i8* %P)
}
-declare void @an_inaccessiblememonly_func() nounwind inaccessiblememonly
-declare void @an_inaccessibleorargmemonly_func(i8 *) nounwind inaccessiblemem_or_argmemonly
-declare void @an_argmemonly_func(i8 *) nounwind argmemonly
+declare void @an_inaccessiblememonly_func() #4
+declare void @an_inaccessibleorargmemonly_func(i8*) #5
+declare void @an_argmemonly_func(i8*) #0
define void @test8(i8* %p) {
entry:
@@ -260,3 +260,80 @@ entry:
; CHECK: NoModRef: call void @an_argmemonly_func(i8* %q) <-> call void @an_inaccessiblememonly_func()
; CHECK: Both ModRef: call void @an_argmemonly_func(i8* %q) <-> call void @an_inaccessibleorargmemonly_func(i8* %q)
}
+
+;; test that unknown operand bundle has unknown effect to the heap
+define void @test9(i8* %p) {
+; CHECK-LABEL: Function: test9
+entry:
+ %q = getelementptr i8, i8* %p, i64 16
+ call void @a_readonly_func(i8* %p) [ "unknown"() ]
+ call void @an_inaccessiblememonly_func() [ "unknown"() ]
+ call void @an_inaccessibleorargmemonly_func(i8* %q) [ "unknown"() ]
+ call void @an_argmemonly_func(i8* %q) [ "unknown"() ]
+ ret void
+
+; CHECK: Both ModRef: Ptr: i8* %p <-> call void @a_readonly_func(i8* %p) [ "unknown"() ]
+; CHECK: Both ModRef: Ptr: i8* %q <-> call void @a_readonly_func(i8* %p) [ "unknown"() ]
+; CHECK: Both ModRef: Ptr: i8* %p <-> call void @an_inaccessiblememonly_func() [ "unknown"() ]
+; CHECK: Both ModRef: Ptr: i8* %q <-> call void @an_inaccessiblememonly_func() [ "unknown"() ]
+; CHECK: Both ModRef: Ptr: i8* %p <-> call void @an_inaccessibleorargmemonly_func(i8* %q) [ "unknown"() ]
+; CHECK: Both ModRef: Ptr: i8* %q <-> call void @an_inaccessibleorargmemonly_func(i8* %q) [ "unknown"() ]
+; CHECK: Both ModRef: Ptr: i8* %p <-> call void @an_argmemonly_func(i8* %q) [ "unknown"() ]
+; CHECK: Both ModRef: Ptr: i8* %q <-> call void @an_argmemonly_func(i8* %q) [ "unknown"() ]
+; CHECK: Both ModRef: call void @a_readonly_func(i8* %p) [ "unknown"() ] <-> call void @an_inaccessiblememonly_func() [ "unknown"() ]
+; CHECK: Both ModRef: call void @a_readonly_func(i8* %p) [ "unknown"() ] <-> call void @an_inaccessibleorargmemonly_func(i8* %q) [ "unknown"() ]
+; CHECK: Both ModRef: call void @a_readonly_func(i8* %p) [ "unknown"() ] <-> call void @an_argmemonly_func(i8* %q) [ "unknown"() ]
+; CHECK: Both ModRef: call void @an_inaccessiblememonly_func() [ "unknown"() ] <-> call void @a_readonly_func(i8* %p) [ "unknown"() ]
+; CHECK: Both ModRef: call void @an_inaccessiblememonly_func() [ "unknown"() ] <-> call void @an_inaccessibleorargmemonly_func(i8* %q) [ "unknown"() ]
+; CHECK: Both ModRef: call void @an_inaccessiblememonly_func() [ "unknown"() ] <-> call void @an_argmemonly_func(i8* %q) [ "unknown"() ]
+; CHECK: Both ModRef: call void @an_inaccessibleorargmemonly_func(i8* %q) [ "unknown"() ] <-> call void @a_readonly_func(i8* %p) [ "unknown"() ]
+; CHECK: Both ModRef: call void @an_inaccessibleorargmemonly_func(i8* %q) [ "unknown"() ] <-> call void @an_inaccessiblememonly_func() [ "unknown"() ]
+; CHECK: Both ModRef: call void @an_inaccessibleorargmemonly_func(i8* %q) [ "unknown"() ] <-> call void @an_argmemonly_func(i8* %q) [ "unknown"() ]
+; CHECK: Both ModRef: call void @an_argmemonly_func(i8* %q) [ "unknown"() ] <-> call void @a_readonly_func(i8* %p) [ "unknown"() ]
+; CHECK: Both ModRef: call void @an_argmemonly_func(i8* %q) [ "unknown"() ] <-> call void @an_inaccessiblememonly_func() [ "unknown"() ]
+; CHECK: Both ModRef: call void @an_argmemonly_func(i8* %q) [ "unknown"() ] <-> call void @an_inaccessibleorargmemonly_func(i8* %q) [ "unknown"() ]
+}
+
+;; test callsite overwrite of unknown operand bundle
+define void @test10(i8* %p) {
+; CHECK-LABEL: Function: test10
+entry:
+ %q = getelementptr i8, i8* %p, i64 16
+ call void @a_readonly_func(i8* %p) #6 [ "unknown"() ]
+ call void @an_inaccessiblememonly_func() #7 [ "unknown"() ]
+ call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ]
+ call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ]
+ ret void
+
+; CHECK: Just Ref: Ptr: i8* %p <-> call void @a_readonly_func(i8* %p) #6 [ "unknown"() ]
+; CHECK: Just Ref: Ptr: i8* %q <-> call void @a_readonly_func(i8* %p) #6 [ "unknown"() ]
+; CHECK: NoModRef: Ptr: i8* %p <-> call void @an_inaccessiblememonly_func() #7 [ "unknown"() ]
+; CHECK: NoModRef: Ptr: i8* %q <-> call void @an_inaccessiblememonly_func() #7 [ "unknown"() ]
+; CHECK: NoModRef: Ptr: i8* %p <-> call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ]
+; CHECK: Both ModRef: Ptr: i8* %q <-> call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ]
+; CHECK: NoModRef: Ptr: i8* %p <-> call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ]
+; CHECK: Both ModRef: Ptr: i8* %q <-> call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ]
+; CHECK: Just Ref: call void @a_readonly_func(i8* %p) #6 [ "unknown"() ] <-> call void @an_inaccessiblememonly_func() #7 [ "unknown"() ]
+; CHECK: Just Ref: call void @a_readonly_func(i8* %p) #6 [ "unknown"() ] <-> call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ]
+; CHECK: Just Ref: call void @a_readonly_func(i8* %p) #6 [ "unknown"() ] <-> call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ]
+; CHECK: Both ModRef: call void @an_inaccessiblememonly_func() #7 [ "unknown"() ] <-> call void @a_readonly_func(i8* %p) #6 [ "unknown"() ]
+; CHECK: Both ModRef: call void @an_inaccessiblememonly_func() #7 [ "unknown"() ] <-> call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ]
+; CHECK: NoModRef: call void @an_inaccessiblememonly_func() #7 [ "unknown"() ] <-> call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ]
+; CHECK: Both ModRef: call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ] <-> call void @a_readonly_func(i8* %p) #6 [ "unknown"() ]
+; CHECK: Both ModRef: call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ] <-> call void @an_inaccessiblememonly_func() #7 [ "unknown"() ]
+; CHECK: Both ModRef: call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ] <-> call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ]
+; CHECK: Both ModRef: call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ] <-> call void @a_readonly_func(i8* %p) #6 [ "unknown"() ]
+; CHECK: NoModRef: call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ] <-> call void @an_inaccessiblememonly_func() #7 [ "unknown"() ]
+; CHECK: Both ModRef: call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ] <-> call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ]
+}
+
+attributes #0 = { argmemonly nounwind }
+attributes #1 = { noinline nounwind readonly }
+attributes #2 = { noinline nounwind writeonly }
+attributes #3 = { nounwind ssp }
+attributes #4 = { inaccessiblememonly nounwind }
+attributes #5 = { inaccessiblemem_or_argmemonly nounwind }
+attributes #6 = { readonly }
+attributes #7 = { inaccessiblememonly }
+attributes #8 = { inaccessiblemem_or_argmemonly }
+attributes #9 = { argmemonly }
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