http://llvm.org/bugs/show_bug.cgi?id=14005
Bug #: 14005
Summary: Clang duplicates arguments of "sub" instruction
Product: clang
Version: 3.1
Platform: PC
OS/Version: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: Frontend
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Classification: Unclassified
We can write simple test:
#include <stdio.h>
int main()
{
static const int ar = &&l2 - &&l1;
if (ar == 0)
printf("FAILED: l2-l1 == 0\n");
else
printf("PASSED\n");
l1:
return 10;
l2:
return 11;
}
where addresses of labels are different. So, their difference is not equal to
zero. But clang thinks, that they are the same.
If we look at internal representation we will see:
@main.ar = internal constant
i32 trunc (i64 sub (i64 ptrtoint (i8* blockaddress(@main, %l2) to i64),
i64 ptrtoint (i8* blockaddress(@main, %l2) to i64)) to
i32), align 4
that the arguments of instruction "sub" are duplicated. It's wrong.
--
Configure bugmail: http://llvm.org/bugs/userprefs.cgi?tab=email
------- 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
