[llvmgcc] Passing large structures by value to functions results in large code. #1117
Description
| Bugzilla Link | 745 |
| Resolution | FIXED |
| Resolved on | Mar 06, 2010 14:00 |
| Version | 1.0 |
| OS | All |
| Depends On | llvm/llvm-bugzilla-archive#1521 |
| Reporter | LLVM Bugzilla Contributor |
Extended Description
#include <stdlib.h>
struct RT {
char a;
char b;
int c;
int d[50][50];
} glob;
int main(int argc, char **argv) {
glob.a = 1;
glob.b = 2;
glob.c = 3;
printf("glob.1 = %d\n", *(&glob + 1));
}
compiles 62 seconds, spits out 18kb bc file with 5063 tmp vars. For
larger arrays (say 1000 X 2000) it never returns. GCC has no problems
compiling such examples.
A 10-liner shouldn't kill the compiler :-)
Domagoj