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| author | Andrew Stubbs <ams@codesourcery.com> | 2011-08-19 15:05:22 +0000 |
|---|---|---|
| committer | Andrew Stubbs <ams@gcc.gnu.org> | 2011-08-19 15:05:22 +0000 |
| commit | a6f969f4cb4b8363b2f20f942d36dd96906ba253 (patch) | |
| tree | 488815969f4c2cccebc3b8d2cb76b788a482e153 /gcc/tree-ssa-math-opts.c | |
| parent | 75161d2ca5a9a3c94e5c2ce6365046693a964368 (diff) | |
| download | gcc-a6f969f4cb4b8363b2f20f942d36dd96906ba253.zip gcc-a6f969f4cb4b8363b2f20f942d36dd96906ba253.tar.gz gcc-a6f969f4cb4b8363b2f20f942d36dd96906ba253.tar.bz2 | |
tree-ssa-math-opts.c (is_widening_mult_rhs_p): Handle constants beyond conversions.
2011-08-19 Andrew Stubbs <ams@codesourcery.com>
gcc/
* tree-ssa-math-opts.c (is_widening_mult_rhs_p): Handle constants
beyond conversions.
(convert_mult_to_widen): Convert constant inputs to the right type.
(convert_plusminus_to_widen): Don't automatically reject inputs that
are not an SSA_NAME.
Convert constant inputs to the right type.
gcc/testsuite/
* gcc.target/arm/wmul-11.c: New file.
* gcc.target/arm/wmul-12.c: New file.
* gcc.target/arm/wmul-13.c: New file.
From-SVN: r177910
Diffstat (limited to 'gcc/tree-ssa-math-opts.c')
| -rw-r--r-- | gcc/tree-ssa-math-opts.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/gcc/tree-ssa-math-opts.c b/gcc/tree-ssa-math-opts.c index 73206ad..6350647 100644 --- a/gcc/tree-ssa-math-opts.c +++ b/gcc/tree-ssa-math-opts.c @@ -1995,7 +1995,16 @@ is_widening_mult_rhs_p (tree type, tree rhs, tree *type_out, : rhs_code != FIXED_CONVERT_EXPR) rhs1 = rhs; else - rhs1 = gimple_assign_rhs1 (stmt); + { + rhs1 = gimple_assign_rhs1 (stmt); + + if (TREE_CODE (rhs1) == INTEGER_CST) + { + *new_rhs_out = rhs1; + *type_out = NULL; + return true; + } + } } else rhs1 = rhs; @@ -2164,6 +2173,12 @@ convert_mult_to_widen (gimple stmt, gimple_stmt_iterator *gsi) rhs2 = build_and_insert_cast (gsi, loc, tmp, rhs2); } + /* Handle constants. */ + if (TREE_CODE (rhs1) == INTEGER_CST) + rhs1 = fold_convert (type1, rhs1); + if (TREE_CODE (rhs2) == INTEGER_CST) + rhs2 = fold_convert (type2, rhs2); + gimple_assign_set_rhs1 (stmt, rhs1); gimple_assign_set_rhs2 (stmt, rhs2); gimple_assign_set_rhs_code (stmt, WIDEN_MULT_EXPR); @@ -2215,8 +2230,6 @@ convert_plusminus_to_widen (gimple_stmt_iterator *gsi, gimple stmt, if (is_gimple_assign (rhs1_stmt)) rhs1_code = gimple_assign_rhs_code (rhs1_stmt); } - else - return false; if (TREE_CODE (rhs2) == SSA_NAME) { @@ -2224,8 +2237,6 @@ convert_plusminus_to_widen (gimple_stmt_iterator *gsi, gimple stmt, if (is_gimple_assign (rhs2_stmt)) rhs2_code = gimple_assign_rhs_code (rhs2_stmt); } - else - return false; /* Allow for one conversion statement between the multiply and addition/subtraction statement. If there are more than @@ -2373,6 +2384,12 @@ convert_plusminus_to_widen (gimple_stmt_iterator *gsi, gimple stmt, add_rhs = build_and_insert_cast (gsi, loc, create_tmp_var (type, NULL), add_rhs); + /* Handle constants. */ + if (TREE_CODE (mult_rhs1) == INTEGER_CST) + rhs1 = fold_convert (type1, mult_rhs1); + if (TREE_CODE (mult_rhs2) == INTEGER_CST) + rhs2 = fold_convert (type2, mult_rhs2); + gimple_assign_set_rhs_with_ops_1 (gsi, wmult_code, mult_rhs1, mult_rhs2, add_rhs); update_stmt (gsi_stmt (*gsi)); |