File: ssa-dse-16.c

package info (click to toggle)
gcc-arm-none-eabi 15%3A8-2019-q3-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 571,828 kB
  • sloc: ansic: 2,937,651; cpp: 881,644; ada: 597,189; makefile: 65,528; asm: 56,499; xml: 46,621; exp: 24,747; sh: 19,684; python: 7,256; pascal: 4,370; awk: 3,497; perl: 2,695; yacc: 316; ml: 285; f90: 234; lex: 198; objc: 194; haskell: 119
file content (17 lines) | stat: -rw-r--r-- 440 bytes parent folder | download | duplicates (6) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-dse1-details" } */

struct X { struct A { int a[2]; } b[10]; };
void foo (struct X *x, int i)
{
  struct A a;
 /* Confuse SRA here with using a variable index, otherwise it will mess
    with the IL too much.  */
  a.a[i] = 3;
  a.a[1] = 0;
  /* The following store is dead.  */
  x->b[i].a[0] = 1;
  x->b[i] = a;
}

/* { dg-final { scan-tree-dump "Deleted dead store" "dse1" } } */