1b1c8d83d3
Turning on `enable_noundef_analysis` flag allows better codegen by removing freeze instructions. I modified clang by renaming `enable_noundef_analysis` flag to `disable-noundef-analysis` and turning it off by default. Test updates are made as a separate patch: D108453 Reviewed By: eugenis Differential Revision: https://reviews.llvm.org/D105169
32 lines
931 B
C++
32 lines
931 B
C++
// RUN: %clang_cc1 -triple=x86_64-apple-darwin -std=c++11 -emit-llvm -o - %s | FileCheck %s
|
|
|
|
class Class1 {
|
|
public:
|
|
[[clang::not_tail_called]] int m1();
|
|
int m2();
|
|
[[clang::not_tail_called]] virtual int m3();
|
|
virtual int m4();
|
|
};
|
|
|
|
class Class2: public Class1 {
|
|
public:
|
|
[[clang::not_tail_called]] int m4() override;
|
|
};
|
|
|
|
int foo1(int a, Class1 *c1, Class2 &c2) {
|
|
if (a)
|
|
return c1->m1();
|
|
c1->m3();
|
|
Class1 &c = c2;
|
|
c.m4();
|
|
c2.m4();
|
|
return c1->m2();
|
|
}
|
|
|
|
// CHECK-LABEL: define{{.*}} i32 @_Z4foo1iP6Class1R6Class2(
|
|
// CHECK: %{{[a-z0-9]+}} = notail call noundef i32 @_ZN6Class12m1Ev(%class.Class1*
|
|
// CHECK: %{{[a-z0-9]+}} = notail call noundef i32 %{{[0-9]+}}(%class.Class1*
|
|
// CHECK-NOT: %{{[a-z0-9]+}} = notail call noundef i32 %{{[0-9]+}}(%class.Class1*
|
|
// CHECK: %{{[a-z0-9]+}} = notail call noundef i32 %{{[0-9]+}}(%class.Class2*
|
|
// CHECK: %{{[a-z0-9]+}} = call noundef i32 @_ZN6Class12m2Ev(%class.Class1*
|