File: struct-dse.c

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-10.1
  • links: PTS, VCS
  • area: main
  • in suites: forky
  • size: 1,999,140 kB
  • sloc: cpp: 6,951,711; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,033; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,252; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (35 lines) | stat: -rw-r--r-- 1,051 bytes parent folder | download | duplicates (14) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
 
// XFAIL:*
//// Currently, LowerDbgDeclare doesn't lower dbg.declares pointing at allocas
//// for structs.

// REQUIRES: lldb
// UNSUPPORTED: system-windows
// RUN: %clang -std=gnu11 -O2 -glldb %s -o %t
// RUN: %dexter --fail-lt 1.0 -w --debugger lldb --binary %t -- %s
//
//// Check debug-info for the escaped struct variable num is reasonable.

#include <stdio.h>
struct Nums {
  int a, b, c, d, e, f, g, h, i, j;
};
struct Nums glob;
__attribute__((__noinline__))
void esc(struct Nums* nums) {
  glob = *nums;
}

__attribute__((__noinline__))
int main() {
  struct Nums nums = { .c=1 };       //// Dead store.
  printf("s1 nums.c: %d\n", nums.c); // DexLabel('s1')

  nums.c = 2;                        //// Killing store.
  printf("s2 nums.c: %d\n", nums.c); // DexLabel('s2')

  esc(&nums);                        //// Force nums to live on the stack.
  return 0;                          // DexLabel('s3')
}

// DexExpectWatchValue('nums.c', '1', on_line=ref('s1'))
// DexExpectWatchValue('nums.c', '2', from_line=ref('s2'), to_line=ref('s3'))