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
829 B
C++
32 lines
829 B
C++
// Test that correct vtable ptr and type metadata are passed to llvm.type.test
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// Related to Bugzilla 43390.
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// RUN: %clang_cc1 -triple x86_64-unknown-linux -fvisibility hidden -std=c++11 -fsanitize=cfi-nvcall -emit-llvm -o - %s | FileCheck %s
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class A1 {
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public:
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virtual int f1() = 0;
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};
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class A2 {
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public:
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virtual int f2() = 0;
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};
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class B : public A1, public A2 {
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public:
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int f2() final { return 1; }
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int f1() final { return 2; }
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};
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// CHECK-LABEL: define hidden noundef i32 @_Z3foov
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int foo() {
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B b;
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return static_cast<A2*>(&b)->f2();
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// CHECK: [[P:%[^ ]*]] = bitcast %class.B* %b to i8**
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// CHECK: [[V:%[^ ]*]] = load i8*, i8** [[P]], align 8
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// CHECK: call i1 @llvm.type.test(i8* [[V]], metadata !"_ZTS1B")
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// CHECK: call i1 @llvm.type.test(i8* [[V]], metadata !"all-vtables")
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}
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