Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-5.c @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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/* { dg-do compile } */ /* { dg-options "-O2 -fdump-tree-optimized" } */ int x; int f1 (int i, int j, int k) { int *p = k ? &i : &j; i = 3; *p = 5; x = j; } /* The assignment "i = 3" is partially dead. Our DSE pass doesn't handle detection of partially dead assignments. There's two outputs which would indicate that the optimization was performed. If we used block copying to detect and eliminate the partially dead store, then we should see an assignment "i = 5" somewhere in the dump file. Another approach would be to redirect the path from the true arm of the first conditional so that it reaches the statement *p = 5 rather than i = 3. */ /* { dg-final { scan-tree-dump-times "i = 5" 1 "optimized" { xfail *-*-* }} } */ /* { dg-final { scan-tree-dump-times "<L.*>:;\[\n\t \]*\\*p = 5" 1 "optimized" { xfail *-*-*}} } */