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comparison gcc/builtins.c @ 36:855418dad1a3

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gcc-4.4-20091020
author e075725
date Tue, 22 Dec 2009 21:19:31 +0900
parents 58ad6c70ea60
children 3bfb6c00c1e0
comparison
equal deleted inserted replaced
19:58ad6c70ea60 36:855418dad1a3
8632 build_real (type, dconstroot)); 8632 build_real (type, dconstroot));
8633 return build_call_expr (fndecl, 2, arg, narg1); 8633 return build_call_expr (fndecl, 2, arg, narg1);
8634 } 8634 }
8635 } 8635 }
8636 8636
8637 /* Optimize pow(pow(x,y),z) = pow(x,y*z). */ 8637 /* Optimize pow(pow(x,y),z) = pow(x,y*z) iff x is nonnegative. */
8638 if (fcode == BUILT_IN_POW 8638 if (fcode == BUILT_IN_POW
8639 || fcode == BUILT_IN_POWF 8639 || fcode == BUILT_IN_POWF
8640 || fcode == BUILT_IN_POWL) 8640 || fcode == BUILT_IN_POWL)
8641 { 8641 {
8642 tree arg00 = CALL_EXPR_ARG (arg0, 0); 8642 tree arg00 = CALL_EXPR_ARG (arg0, 0);
8643 tree arg01 = CALL_EXPR_ARG (arg0, 1); 8643 if (tree_expr_nonnegative_p (arg00))
8644 tree narg1 = fold_build2 (MULT_EXPR, type, arg01, arg1); 8644 {
8645 return build_call_expr (fndecl, 2, arg00, narg1); 8645 tree arg01 = CALL_EXPR_ARG (arg0, 1);
8646 tree narg1 = fold_build2 (MULT_EXPR, type, arg01, arg1);
8647 return build_call_expr (fndecl, 2, arg00, narg1);
8648 }
8646 } 8649 }
8647 } 8650 }
8648 8651
8649 return NULL_TREE; 8652 return NULL_TREE;
8650 } 8653 }