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| author | Richard Biener <rguenther@suse.de> | 2017-03-02 13:42:05 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2017-03-02 13:42:05 +0000 |
| commit | e80facb4afaaa4d42b17f6970e9738f7c293f522 (patch) | |
| tree | 1ae9c4a7112cdf29926e13b25e432f7a93f48b81 /gcc/fixed-value.c | |
| parent | f03e92172a78fbb7beab293ced88b161b2cfb4c5 (diff) | |
| download | gcc-e80facb4afaaa4d42b17f6970e9738f7c293f522.zip gcc-e80facb4afaaa4d42b17f6970e9738f7c293f522.tar.gz gcc-e80facb4afaaa4d42b17f6970e9738f7c293f522.tar.bz2 | |
re PR tree-optimization/79345 (passing yet-uninitialized member as argument to base class constructor should warn (-Wunitialized))
2017-03-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/79345
PR c++/42000
* tree-ssa-alias.c (walk_aliased_vdefs_1): Take a limit
param and abort the walk, returning -1 if it is hit.
(walk_aliased_vdefs): Take a limit param and pass it on.
* tree-ssa-alias.h (walk_aliased_vdefs): Add a limit param,
defaulting to 0 and return a signed int.
* tree-ssa-uninit.c (struct check_defs_data): New struct.
(check_defs): New helper.
(warn_uninitialized_vars): Use walk_aliased_vdefs to warn
about uninitialized memory.
* fixed-value.c (fixed_from_string): Use ulow/uhigh to avoid
bogus uninitialized warning.
(fixed_convert_from_real): Likewise.
* g++.dg/warn/Wuninitialized-7.C: New testcase.
* c-c++-common/ubsan/bounds-2.c: Add -Wno-uninitialized.
* gcc.dg/uninit-pr19430-2.c: Add expected warning.
From-SVN: r245840
Diffstat (limited to 'gcc/fixed-value.c')
| -rw-r--r-- | gcc/fixed-value.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/gcc/fixed-value.c b/gcc/fixed-value.c index 810f701..d9489a3 100644 --- a/gcc/fixed-value.c +++ b/gcc/fixed-value.c @@ -130,8 +130,8 @@ fixed_from_string (FIXED_VALUE_TYPE *f, const char *str, machine_mode mode) real_arithmetic (&fixed_value, MULT_EXPR, &real_value, &base_value); wide_int w = real_to_integer (&fixed_value, &fail, GET_MODE_PRECISION (mode)); - f->data.low = w.elt (0); - f->data.high = w.elt (1); + f->data.low = w.ulow (); + f->data.high = w.uhigh (); if (temp == FIXED_MAX_EPS && ALL_FRACT_MODE_P (f->mode)) { @@ -1049,8 +1049,8 @@ fixed_convert_from_real (FIXED_VALUE_TYPE *f, machine_mode mode, wide_int w = real_to_integer (&fixed_value, &fail, GET_MODE_PRECISION (mode)); - f->data.low = w.elt (0); - f->data.high = w.elt (1); + f->data.low = w.ulow (); + f->data.high = w.uhigh (); temp = check_real_for_fixed_mode (&real_value, mode); if (temp == FIXED_UNDERFLOW) /* Minimum. */ { |