rjmccall added a comment.
Oh, of course. Sadly, in C/C++ the declaration point of a variable does not
necessarily dominate all uses of the variable, so you need to emit the cast
immediately after the alloca. Just temporarily move CGF.Builder to that point;
hopefully we can assume that this function will never try to add control flow.
Test case:
extern void use(int*);
void foo() {
goto later;
int x;
later:
use(&x);
}
https://reviews.llvm.org/D35438
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