[llvm-bugs] [Bug 45143] New: __builtin_dump_struct doesn't handle float fields correctly

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=45143

            Bug ID: 45143
           Summary: __builtin_dump_struct doesn't handle float fields
                    correctly
           Product: clang
           Version: 7.0
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: ndkrempel at gmail.com
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

The following program:

#include <cstdio>
struct Foo {
    float a;
};
int main() {
    Foo f = {1.2f};
    __builtin_dump_struct(&f, &std::printf);
}

prints out:

struct Foo {
float a : 0.000000
}

Rather than the correct value 1.2.

Reproduced in clang 7.0.0, 8.0.0, 9.0.0, and trunk.

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