https://bugs.llvm.org/show_bug.cgi?id=52554
Bug ID: 52554
Summary: Argument promotion not happening for static function.
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Interprocedural Analyses
Assignee: unassignedb...@nondot.org
Reporter: jmuizel...@mozilla.com
CC: llvm-bugs@lists.llvm.org
Given:
__attribute__((noinline))
static int foo(const int &x) {
return x;
}
int r(int x) {
return foo(x);
}
GCC gives:
foo(int const&) [clone .isra.0]:
mov eax, edi
ret
r(int):
jmp foo(int const&) [clone .isra.0]
vs clang's:
r(int): # @r(int)
push rax
mov dword ptr [rsp + 4], edi
lea rdi, [rsp + 4]
call foo(int const&)
pop rcx
ret
foo(int const&): # @foo(int const&)
mov eax, dword ptr [rdi]
ret
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