[src/trunk]: src/usr.bin/make make: eliminate a few common subexpressions

[rillig <rillig%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7a72607260c9
branches:  trunk
changeset: 1023494:7a72607260c9
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sat Sep 11 09:16:14 2021 +0000

description:
make: eliminate a few common subexpressions

This commit contains only changes that don't increase the code size on
x86_64.  Replacing the remaining instance of ModChain_ShouldEval would
either increase the code size or make the code harder to understand.

No functional change.

diffstat:

 usr.bin/make/var.c |  28 ++++++++++++++++------------
 1 files changed, 16 insertions(+), 12 deletions(-)

diffs (97 lines):

diff -r 81b195ef8262 -r 7a72607260c9 usr.bin/make/var.c
--- a/usr.bin/make/var.c        Sat Sep 11 08:34:24 2021 +0000
+++ b/usr.bin/make/var.c        Sat Sep 11 09:16:14 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: var.c,v 1.949 2021/09/06 19:38:30 rillig Exp $ */
+/*     $NetBSD: var.c,v 1.950 2021/09/11 09:16:14 rillig Exp $ */
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -140,7 +140,7 @@
 #include "metachar.h"
 
 /*     "@(#)var.c      8.3 (Berkeley) 3/19/94" */
-MAKE_RCSID("$NetBSD: var.c,v 1.949 2021/09/06 19:38:30 rillig Exp $");
+MAKE_RCSID("$NetBSD: var.c,v 1.950 2021/09/11 09:16:14 rillig Exp $");
 
 /*
  * Variables are defined using one of the VAR=value assignments.  Their
@@ -2564,6 +2564,7 @@
 static ApplyModifierResult
 ApplyModifier_Gmtime(const char **pp, ModChain *ch)
 {
+       Expr *expr;
        time_t utc;
 
        const char *mod = *pp;
@@ -2583,9 +2584,10 @@
                *pp = mod + 6;
        }
 
-       if (ModChain_ShouldEval(ch))
-               Expr_SetValueOwn(ch->expr,
-                   VarStrftime(ch->expr->value.str, true, utc));
+       expr = ch->expr;
+       if (Expr_ShouldEval(expr))
+               Expr_SetValueOwn(expr,
+                   VarStrftime(expr->value.str, true, utc));
 
        return AMR_OK;
 }
@@ -2594,6 +2596,7 @@
 static ApplyModifierResult
 ApplyModifier_Localtime(const char **pp, ModChain *ch)
 {
+       Expr *expr;
        time_t utc;
 
        const char *mod = *pp;
@@ -2613,9 +2616,10 @@
                *pp = mod + 9;
        }
 
-       if (ModChain_ShouldEval(ch))
-               Expr_SetValueOwn(ch->expr,
-                   VarStrftime(ch->expr->value.str, false, utc));
+       expr = ch->expr;
+       if (Expr_ShouldEval(expr))
+               Expr_SetValueOwn(expr,
+                   VarStrftime(expr->value.str, false, utc));
 
        return AMR_OK;
 }
@@ -2644,7 +2648,7 @@
 
        (*pp)++;
 
-       if (!ModChain_ShouldEval(ch))
+       if (!Expr_ShouldEval(expr))
                return AMR_OK;
 
        Expr_Define(expr);
@@ -3149,14 +3153,14 @@
 
        if (mod[1] == 'u') {                            /* :tu */
                *pp = mod + 2;
-               if (ModChain_ShouldEval(ch))
+               if (Expr_ShouldEval(expr))
                        Expr_SetValueOwn(expr, str_toupper(expr->value.str));
                return AMR_OK;
        }
 
        if (mod[1] == 'l') {                            /* :tl */
                *pp = mod + 2;
-               if (ModChain_ShouldEval(ch))
+               if (Expr_ShouldEval(expr))
                        Expr_SetValueOwn(expr, str_tolower(expr->value.str));
                return AMR_OK;
        }
@@ -3443,7 +3447,7 @@
                return AMR_CLEANUP;
        }
 
-       if (!ModChain_ShouldEval(ch)) {
+       if (!Expr_ShouldEval(expr)) {
                FStr_Done(&then_expr);
                FStr_Done(&else_expr);
        } else if (value) {