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
49 lines
768 B
C++
49 lines
768 B
C++
// RUN: %clang_cc1 %s -triple x86_64-unknown-unknown -emit-llvm -o - | FileCheck %s
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// PR6641
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extern "C" int printf(const char *, ...);
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struct Foo {
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Foo() : iFoo (2) {
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printf("%p\n", this);
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}
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int iFoo;
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};
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typedef Foo (*T)[3][4];
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T bar() {
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return new Foo[2][3][4];
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}
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T bug(int i) {
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return new Foo[i][3][4];
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}
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void pr(T a) {
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for (int i = 0; i < 3; i++)
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for (int j = 0; j < 4; j++)
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printf("%p\n", a[i][j]);
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}
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Foo *test() {
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return new Foo[5];
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}
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int main() {
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T f = bar();
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pr(f);
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f = bug(3);
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pr(f);
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Foo * g = test();
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for (int i = 0; i < 5; i++)
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printf("%d\n", g[i].iFoo);
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return 0;
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}
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// CHECK: call noalias noundef nonnull i8* @_Znam
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// CHECK: call noalias noundef nonnull i8* @_Znam
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// CHECK: call noalias noundef nonnull i8* @_Znam
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