[llvm-gcc] Using __asm__ to rename symbols is broken on OS/X

[lattner]

Bugzilla Link	630
Resolution	FIXED
Resolved on	Feb 22, 2010 12:50
Version	1.3
OS	MacOS X

Extended Description

LLVM miscompiles this:

void foo() asm("_foo2");
void bar() {
foo();
}

"_" (aka USER_LABEL_PREFIX in GCC target header files) should only be added to user symbols, not to
asm's. Because of this, the "foo" function should really reference "_foo2", not "__foo2".

The right way to do this is to remove the "_" prefixification from the darwin asm printer, and make the
CFE add USER_LABEL_PREFIX to user labels (duh), but not asm labels.

-Chris

[lattner]

assigned to @lattner

[lattner]

Fixed, testcase here: Regression/CFrontend/2005-09-24-AsmUserPrefix.c

Patches here:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20050919/028324.html
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20050919/028325.html
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20050919/028326.html

-Chris