5f0ac1ef78
clang++ uses llvm.compiler.used in certain cases to preserve symbol which is fully inlined. D96087 has resulted in undefined symbols in such cases. Set it to false by default to preserve old behavior but keep the option for specific uses where we want to ignore these (e.g. to detect a potential indirect call to a function). Differential Revision: https://reviews.llvm.org/D99897
38 lines
1.2 KiB
LLVM
38 lines
1.2 KiB
LLVM
; RUN: opt < %s -print-callgraph -disable-output 2>&1 | FileCheck %s
|
|
|
|
; The test will report used1 and used2 functions as used on the grounds
|
|
; of llvm.*.used references. Passing IgnoreLLVMUsed = true into the
|
|
; Function::hasAddressTaken() in the CallGraph::addToCallGraph() has to
|
|
; change their uses to zero.
|
|
|
|
; CHECK: Call graph node <<null function>><<{{.*}}>> #uses=0
|
|
; CHECK-NEXT: CS<None> calls function 'used1'
|
|
; CHECK-NEXT: CS<None> calls function 'used2'
|
|
; CHECK-NEXT: CS<None> calls function 'unused'
|
|
; CHECK-EMPTY:
|
|
; CHECK-NEXT: Call graph node for function: 'unused'<<{{.*}}>> #uses=1
|
|
; CHECK-EMPTY:
|
|
; CHECK-NEXT: Call graph node for function: 'used1'<<{{.*}}>> #uses=1
|
|
; CHECK-EMPTY:
|
|
; CHECK-NEXT: Call graph node for function: 'used2'<<{{.*}}>> #uses=1
|
|
; CHECK-EMPTY:
|
|
|
|
@llvm.used = appending global [1 x i8*] [i8* bitcast (void ()* @used1 to i8*)]
|
|
@llvm.compiler.used = appending global [1 x void()*] [void ()* @used2]
|
|
@array = appending global [1 x i8*] [i8* bitcast (void ()* @unused to i8*)]
|
|
|
|
define internal void @used1() {
|
|
entry:
|
|
ret void
|
|
}
|
|
|
|
define internal void @used2() {
|
|
entry:
|
|
ret void
|
|
}
|
|
|
|
define internal void @unused() {
|
|
entry:
|
|
ret void
|
|
}
|