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| author | Richard Biener <rguenther@suse.de> | 2018-01-24 09:37:41 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2018-01-24 09:37:41 +0000 |
| commit | 6acfd18c395cca3d0c5acf9d62a3c1556ea58d90 (patch) | |
| tree | b490edd97925d19af2b4a4544a79365599ffc269 /gcc/tree-chrec.c | |
| parent | da37a70f55338ef295bb1f7a39f9ef3e407835dd (diff) | |
| download | gcc-6acfd18c395cca3d0c5acf9d62a3c1556ea58d90.zip gcc-6acfd18c395cca3d0c5acf9d62a3c1556ea58d90.tar.gz gcc-6acfd18c395cca3d0c5acf9d62a3c1556ea58d90.tar.bz2 | |
re PR tree-optimization/83176 ([graphite] ICE in set_codegen_error, at graphite-isl-ast-to-gimple.c:206)
2018-01-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/83176
* tree-chrec.c (chrec_fold_plus_1): Handle (signed T){(T) .. }
operands.
* gcc.dg/graphite/pr83176.c: New testcase.
From-SVN: r257013
Diffstat (limited to 'gcc/tree-chrec.c')
| -rw-r--r-- | gcc/tree-chrec.c | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/gcc/tree-chrec.c b/gcc/tree-chrec.c index 924df04..896ff35 100644 --- a/gcc/tree-chrec.c +++ b/gcc/tree-chrec.c @@ -295,8 +295,23 @@ chrec_fold_plus_1 (enum tree_code code, tree type, return chrec_fold_plus_poly_poly (code, type, op0, op1); CASE_CONVERT: - if (tree_contains_chrecs (op1, NULL)) - return chrec_dont_know; + { + /* We can strip sign-conversions to signed by performing the + operation in unsigned. */ + tree optype = TREE_TYPE (TREE_OPERAND (op1, 0)); + if (INTEGRAL_TYPE_P (type) + && INTEGRAL_TYPE_P (optype) + && tree_nop_conversion_p (type, optype) + && TYPE_UNSIGNED (optype)) + return chrec_convert (type, + chrec_fold_plus_1 (code, optype, + chrec_convert (optype, + op0, NULL), + TREE_OPERAND (op1, 0)), + NULL); + if (tree_contains_chrecs (op1, NULL)) + return chrec_dont_know; + } /* FALLTHRU */ default: @@ -313,8 +328,23 @@ chrec_fold_plus_1 (enum tree_code code, tree type, } CASE_CONVERT: - if (tree_contains_chrecs (op0, NULL)) - return chrec_dont_know; + { + /* We can strip sign-conversions to signed by performing the + operation in unsigned. */ + tree optype = TREE_TYPE (TREE_OPERAND (op0, 0)); + if (INTEGRAL_TYPE_P (type) + && INTEGRAL_TYPE_P (optype) + && tree_nop_conversion_p (type, optype) + && TYPE_UNSIGNED (optype)) + return chrec_convert (type, + chrec_fold_plus_1 (code, optype, + TREE_OPERAND (op0, 0), + chrec_convert (optype, + op1, NULL)), + NULL); + if (tree_contains_chrecs (op0, NULL)) + return chrec_dont_know; + } /* FALLTHRU */ default: |