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Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 0aca93c..3c8636e 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -8852,6 +8852,29 @@ fold_comparison (enum tree_code code, tree type, tree op0, tree op1) } } + /* If this is a comparison of complex values and both sides + are COMPLEX_CST, do the comparision by parts to fold the + comparision. */ + if ((code == EQ_EXPR || code == NE_EXPR) + && TREE_CODE (TREE_TYPE (arg0)) == COMPLEX_TYPE + && TREE_CODE (arg0) == COMPLEX_CST + && TREE_CODE (arg1) == COMPLEX_CST) + { + tree real0, imag0, real1, imag1; + enum tree_code outercode; + + real0 = TREE_REALPART (arg0); + imag0 = TREE_IMAGPART (arg0); + real1 = TREE_REALPART (arg1); + imag1 = TREE_IMAGPART (arg1); + outercode = code == EQ_EXPR ? TRUTH_ANDIF_EXPR : TRUTH_ORIF_EXPR; + + return fold_build2 (outercode, type, + fold_build2 (code, type, real0, real1), + fold_build2 (code, type, imag0, imag1)); + } + + /* Fold a comparison of the address of COMPONENT_REFs with the same type and component to a comparison of the address of the base object. In short, &x->a OP &y->a to x OP y and |