diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index dadb6cd41a0..a3e069e4bac 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -1708,6 +1708,7 @@ expand_builtin_mathfn (tree exp, rtx target, rtx subtarget) narg = save_expr (arg); if (narg != arg) { + arg = narg; arglist = build_tree_list (NULL_TREE, arg); exp = build_function_call_expr (fndecl, arglist); } @@ -1840,6 +1841,7 @@ expand_builtin_mathfn_2 (tree exp, rtx target, rtx subtarget) narg = save_expr (arg1); if (narg != arg1) { + arg1 = narg; temp = build_tree_list (NULL_TREE, narg); stable = false; } @@ -1849,6 +1851,7 @@ expand_builtin_mathfn_2 (tree exp, rtx target, rtx subtarget) narg = save_expr (arg0); if (narg != arg0) { + arg0 = narg; arglist = tree_cons (NULL_TREE, narg, temp); stable = false; } @@ -6581,7 +6584,7 @@ fold_builtin (tree exp) return build_function_call_expr (expfn, arglist); } - /* Optimize sqrt(pow(x,y)) = pow(x,y*0.5). */ + /* Optimize sqrt(pow(x,y)) = pow(|x|,y*0.5). */ if (flag_unsafe_math_optimizations && (fcode == BUILT_IN_POW || fcode == BUILT_IN_POWF @@ -6590,8 +6593,11 @@ fold_builtin (tree exp) tree powfn = TREE_OPERAND (TREE_OPERAND (arg, 0), 0); tree arg0 = TREE_VALUE (TREE_OPERAND (arg, 1)); tree arg1 = TREE_VALUE (TREE_CHAIN (TREE_OPERAND (arg, 1))); - tree narg1 = fold (build (MULT_EXPR, type, arg1, - build_real (type, dconsthalf))); + tree narg1; + if (!tree_expr_nonnegative_p (arg0)) + arg0 = build1 (ABS_EXPR, type, arg0); + narg1 = fold (build (MULT_EXPR, type, arg1, + build_real (type, dconsthalf))); arglist = tree_cons (NULL_TREE, arg0, build_tree_list (NULL_TREE, narg1)); return build_function_call_expr (powfn, arglist); |