case Instruction::Call:
case Instruction::Invoke: {
+ bool Captures = true;
+
+ if (I->getType()->isVoidTy())
+ Captures = false;
+
+ auto AddUsersToWorklistIfCapturing = [&] {
+ if (Captures)
+ for (Use &UU : I->uses())
+ if (Visited.insert(&UU))
+ Worklist.push_back(&UU);
+ };
+
CallSite CS(I);
- if (CS.doesNotAccessMemory())
+ if (CS.doesNotAccessMemory()) {
+ AddUsersToWorklistIfCapturing();
continue;
+ }
Function *F = CS.getCalledFunction();
if (!F) {
if (CS.onlyReadsMemory()) {
IsRead = true;
+ AddUsersToWorklistIfCapturing();
continue;
}
return Attribute::None;
"More params than args in non-varargs call.");
return Attribute::None;
}
+ Captures &= !CS.doesNotCapture(A - B);
if (SCCNodes.count(AI))
continue;
if (!CS.onlyReadsMemory() && !CS.onlyReadsMemory(A - B))
IsRead = true;
}
}
+ AddUsersToWorklistIfCapturing();
break;
}
ret i1* %lookup
}
-; CHECK: define i1 @c7(i32* readnone %q, i32 %bitno)
+; CHECK: define i1 @c7(i32* readonly %q, i32 %bitno)
define i1 @c7(i32* %q, i32 %bitno) {
%ptr = call i1* @lookup_bit(i32* %q, i32 %bitno)
%val = load i1* %ptr
define void @test7_1(i32* inalloca %a) {
ret void
}
+
+; CHECK: define i32* @test8_1(i32* readnone %p)
+define i32* @test8_1(i32* %p) {
+entry:
+ ret i32* %p
+}
+
+; CHECK: define void @test8_2(i32* %p)
+define void @test8_2(i32* %p) {
+entry:
+ %call = call i32* @test8_1(i32* %p)
+ store i32 10, i32* %call, align 4
+ ret void
+}