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| author | Richard Biener <rguenther@suse.de> | 2022-03-31 09:21:27 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2022-03-31 10:35:41 +0200 |
| commit | 97ad0b831386e56ecb125a25fff00b2cb0b1a2b9 (patch) | |
| tree | fef1b241bef258354eec757bfbedcb8389ce94b9 | |
| parent | bf4832d6fa817f66009f100a9cd68953062add7d (diff) | |
| download | gcc-97ad0b831386e56ecb125a25fff00b2cb0b1a2b9.zip gcc-97ad0b831386e56ecb125a25fff00b2cb0b1a2b9.tar.gz gcc-97ad0b831386e56ecb125a25fff00b2cb0b1a2b9.tar.bz2 | |
tree-optimization/105109 - bogus uninit diagnostic with _Complex
When update_address_taken rewrites a _Complex into SSA it changes
stores to real/imaginary parts to loads of the other component and
a COMPLEX_EXPR. That matches what gimplification does but it misses
suppression of diagnostics for the load of the other component.
The following patch adds that, syncing up gimplification and
update_address_taken behavior.
2022-03-31 Richard Biener <rguenther@suse.de>
PR tree-optimization/105109
* tree-ssa.cc (execute_update_addresses_taken): Suppress
diagnostics on the load of the other complex component.
* gcc.dg/uninit-pr105109.c: New testcase.
| -rw-r--r-- | gcc/testsuite/gcc.dg/uninit-pr105109.c | 15 | ||||
| -rw-r--r-- | gcc/tree-ssa.cc | 1 |
2 files changed, 16 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/uninit-pr105109.c b/gcc/testsuite/gcc.dg/uninit-pr105109.c new file mode 100644 index 0000000..001003ca --- /dev/null +++ b/gcc/testsuite/gcc.dg/uninit-pr105109.c @@ -0,0 +1,15 @@ +/* { dg-do compile } */ +/* { dg-options "-O -Wuninitialized" } */ + +static void foo(int dim,float _Complex f0[]) +{ + int d; + f0[0] -= 3.14; /* { dg-bogus "uninitialized" } */ + for (d = 0; d < dim; ++d) f0[0] += 3.14; +} +void bar(int dim, const float _Complex u_t[], float _Complex f0[]) +{ + float _Complex exp[1] = {0.}; + foo(dim, exp); + f0[0] = u_t[0] - exp[0]; +} diff --git a/gcc/tree-ssa.cc b/gcc/tree-ssa.cc index 6dcb314..a362a0a 100644 --- a/gcc/tree-ssa.cc +++ b/gcc/tree-ssa.cc @@ -1905,6 +1905,7 @@ execute_update_addresses_taken (void) ? REALPART_EXPR : IMAGPART_EXPR, TREE_TYPE (other), TREE_OPERAND (lhs, 0)); + suppress_warning (lrhs); gimple *load = gimple_build_assign (other, lrhs); location_t loc = gimple_location (stmt); gimple_set_location (load, loc); |