http://llvm.org/bugs/show_bug.cgi?id=20045
Bug ID: 20045
Summary: Incorrect code of variable arguments
Product: clang
Version: trunk
Hardware: PC
OS: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Clang 3.5.0 (based on LLVM 3.5svn) for x86_64 target miscompiles the following
code.
% cat error.c
#include <stdarg.h>
struct S { float m0[2]; int m1; };
void func1( int fx, ... )
{
struct S fs;
va_list ap;
va_start(ap, fx);
fs = va_arg(ap, struct S);
va_end(ap);
if( fs.m1 != 1 ) { __builtin_abort(); }
}
int main( void )
{
int x = 1;
struct S s = {{1.0F,1.0F},1};
func1(x, s);
return 0;
}
% clang error.c
% ./a.out
zsh: abort ./a.out
% clang -v
clang version 3.5.0 (trunk 210625)
Target: x86_64-apple-darwin13.2.0
Thread model: posix
The value of fs.m1 was 1065353216 instead of 1.
--
You are receiving this mail because:
You are on the CC list for the bug.
_______________________________________________
LLVMbugs mailing list
[email protected]
http://lists.cs.uiuc.edu/mailman/listinfo/llvmbugs
