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| author | Richard Guenther <rguenther@suse.de> | 2008-03-27 16:32:28 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2008-03-27 16:32:28 +0000 |
| commit | 62bc00e258331aeba39f47e9fee275f4ba5b7956 (patch) | |
| tree | c628fc1d3e3534745082337d622e3b846f62f870 /gcc/tree-ssa-ccp.c | |
| parent | 525521b6ddb69a9f0478704e0eec2231c0923d2d (diff) | |
| download | gcc-62bc00e258331aeba39f47e9fee275f4ba5b7956.zip gcc-62bc00e258331aeba39f47e9fee275f4ba5b7956.tar.gz gcc-62bc00e258331aeba39f47e9fee275f4ba5b7956.tar.bz2 | |
re PR tree-optimization/32810 (Not folding of const element for goto)
2008-03-27 Richard Guenther <rguenther@suse.de>
PR tree-optimization/32810
* tree-ssa-ccp.c (get_symbol_constant_value): Strip useless
conversions from DECL_INITIAL.
(fold_const_aggregate_ref): Likewise from constructor elements.
* gcc.dg/tree-ssa/ssa-ccp-18.c: New testcase.
From-SVN: r133645
Diffstat (limited to 'gcc/tree-ssa-ccp.c')
| -rw-r--r-- | gcc/tree-ssa-ccp.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/gcc/tree-ssa-ccp.c b/gcc/tree-ssa-ccp.c index 8dcc759..9bba505 100644 --- a/gcc/tree-ssa-ccp.c +++ b/gcc/tree-ssa-ccp.c @@ -278,9 +278,12 @@ get_symbol_constant_value (tree sym) && !MTAG_P (sym)) { tree val = DECL_INITIAL (sym); - if (val - && is_gimple_min_invariant (val)) - return val; + if (val) + { + STRIP_USELESS_TYPE_CONVERSION (val); + if (is_gimple_min_invariant (val)) + return val; + } /* Variables declared 'const' without an initializer have zero as the intializer if they may not be overridden at link or run time. */ @@ -1104,7 +1107,10 @@ fold_const_aggregate_ref (tree t) /* Whoo-hoo! I'll fold ya baby. Yeah! */ FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (ctor), cnt, cfield, cval) if (tree_int_cst_equal (cfield, idx)) - return cval; + { + STRIP_USELESS_TYPE_CONVERSION (cval); + return cval; + } break; case COMPONENT_REF: @@ -1144,7 +1150,10 @@ fold_const_aggregate_ref (tree t) if (cfield == field /* FIXME: Handle bit-fields. */ && ! DECL_BIT_FIELD (cfield)) - return cval; + { + STRIP_USELESS_TYPE_CONVERSION (cval); + return cval; + } break; case REALPART_EXPR: |