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| author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
|---|---|---|
| committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
| commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
| tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/testsuite/g++.dg/tree-ssa/pr19807.C | |
| download | cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.bz2 cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.xz | |
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Diffstat (limited to 'gcc/testsuite/g++.dg/tree-ssa/pr19807.C')
| -rw-r--r-- | gcc/testsuite/g++.dg/tree-ssa/pr19807.C | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/tree-ssa/pr19807.C b/gcc/testsuite/g++.dg/tree-ssa/pr19807.C new file mode 100644 index 000000000..bba79a9d1 --- /dev/null +++ b/gcc/testsuite/g++.dg/tree-ssa/pr19807.C @@ -0,0 +1,30 @@ +/* { dg-do compile } */ +/* { dg-options "-O -fdump-tree-optimized" } */ + +int a[4]; +int *x, *y, *z; + +void foo(void) +{ + x = &a[3] - 1; + y = &a[1] + 1; + z = 1 + &a[1]; +} + +void bar(int i) +{ + x = &a[i] - 1; + y = &a[i] + 1; + z = 1 + &a[i]; +} + +/* { dg-final { scan-tree-dump-times "&a\\\[2\\\]" 3 "optimized" } } */ + +/* We want &a[D.bla + 1] and &a[D.foo - 1] in the final code, but + tuples mean that the offset is calculated in a separate instruction. + Simply test for the existence of +1 and -1 once, which also ensures + the above. If the addition/subtraction would be applied to the + pointer we would instead see +-4 (or 8, depending on sizeof(int)). */ +/* { dg-final { scan-tree-dump-times "\\\+ -1;" 1 "optimized" } } */ +/* { dg-final { scan-tree-dump-times "\\\+ 1;" 1 "optimized" } } */ +/* { dg-final { cleanup-tree-dump "optimized" } } */ |