X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=scope.c;h=92e952360d3f56963afb24fb3a76855799693e2c;hb=af5050ac60ae083ebc5a0b2a1b4289c51c622f95;hp=b2c2ee0f64e46156d0fa5eccedf00aedb480114a;hpb=e0fa7e2be05466f132eb653ebe7b2f9664ffcb3b;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/scope.c b/scope.c
index b2c2ee0..92e9523 100644
--- a/scope.c
+++ b/scope.c
@@ -373,10 +373,9 @@ Perl_save_bool(pTHX_ bool *boolp)
 
     PERL_ARGS_ASSERT_SAVE_BOOL;
 
-    SSCHECK(3);
-    SSPUSHBOOL(*boolp);
+    SSCHECK(2);
     SSPUSHPTR(boolp);
-    SSPUSHUV(SAVEt_BOOL);
+    SSPUSHUV(SAVEt_BOOL | (*boolp << 8));
 }
 
 void
@@ -393,10 +392,16 @@ void
 Perl_save_int(pTHX_ int *intp)
 {
     dVAR;
+    const UV shifted = (UV)*intp << SAVE_TIGHT_SHIFT;
 
     PERL_ARGS_ASSERT_SAVE_INT;
 
-    save_pushi32ptr(*intp, intp, SAVEt_INT);
+    if ((int)(shifted >> SAVE_TIGHT_SHIFT) == *intp) {
+	SSCHECK(2);
+	SSPUSHPTR(intp);
+	SSPUSHUV(SAVEt_INT_SMALL | shifted);
+    } else
+	save_pushi32ptr(*intp, intp, SAVEt_INT);
 }
 
 void
@@ -406,7 +411,9 @@ Perl_save_I8(pTHX_ I8 *bytep)
 
     PERL_ARGS_ASSERT_SAVE_I8;
 
-    save_pushi32ptr(*bytep, bytep, SAVEt_I8);
+    SSCHECK(2);
+    SSPUSHPTR(bytep);
+    SSPUSHUV(SAVEt_I8 | ((UV)*bytep << 8));
 }
 
 void
@@ -416,17 +423,25 @@ Perl_save_I16(pTHX_ I16 *intp)
 
     PERL_ARGS_ASSERT_SAVE_I16;
 
-    save_pushi32ptr(*intp, intp, SAVEt_I16);
+    SSCHECK(2);
+    SSPUSHPTR(intp);
+    SSPUSHUV(SAVEt_I16 | ((UV)*intp << 8));
 }
 
 void
 Perl_save_I32(pTHX_ I32 *intp)
 {
     dVAR;
+    const UV shifted = (UV)*intp << SAVE_TIGHT_SHIFT;
 
     PERL_ARGS_ASSERT_SAVE_I32;
 
-    save_pushi32ptr(*intp, intp, SAVEt_I32);
+    if ((I32)(shifted >> SAVE_TIGHT_SHIFT) == *intp) {
+	SSCHECK(2);
+	SSPUSHPTR(intp);
+	SSPUSHUV(SAVEt_I32_SMALL | shifted);
+    } else
+	save_pushi32ptr(*intp, intp, SAVEt_I32);
 }
 
 /* Cannot use save_sptr() to store a char* since the SV** cast will
@@ -680,13 +695,17 @@ Perl_save_alloc(pTHX_ I32 size, I32 pad)
     dVAR;
     register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
 				- (char*)PL_savestack);
-    register const I32 elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
+    const UV elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
+    const UV elems_shifted = elems << SAVE_TIGHT_SHIFT;
 
-    SSGROW(elems + 2);
+    if ((elems_shifted >> SAVE_TIGHT_SHIFT) != elems)
+	Perl_croak(aTHX_ "panic: save_alloc elems %"UVuf" out of range (%ld-%ld)",
+		   elems, size, pad);
+
+    SSGROW(elems + 1);
 
     PL_savestack_ix += elems;
-    SSPUSHINT(elems);
-    SSPUSHUV(SAVEt_ALLOC);
+    SSPUSHUV(SAVEt_ALLOC | elems_shifted);
     return start;
 }
 
@@ -789,13 +808,21 @@ Perl_leave_scope(pTHX_ I32 base)
 		PL_localizing = 0;
 	    }
 	    break;
+	case SAVEt_INT_SMALL:
+	    ptr = SSPOPPTR;
+	    *(int*)ptr = (int)(uv >> SAVE_TIGHT_SHIFT);
+	    break;
 	case SAVEt_INT:				/* int reference */
 	    ptr = SSPOPPTR;
 	    *(int*)ptr = (int)SSPOPINT;
 	    break;
 	case SAVEt_BOOL:			/* bool reference */
 	    ptr = SSPOPPTR;
-	    *(bool*)ptr = cBOOL(SSPOPBOOL);
+	    *(bool*)ptr = cBOOL(uv >> 8);
+	    break;
+	case SAVEt_I32_SMALL:
+	    ptr = SSPOPPTR;
+	    *(I32*)ptr = (I32)(uv >> SAVE_TIGHT_SHIFT);
 	    break;
 	case SAVEt_I32:				/* I32 reference */
 	    ptr = SSPOPPTR;
@@ -932,11 +959,8 @@ Perl_leave_scope(pTHX_ I32 base)
 	    break;
 	case SAVEt_REGCONTEXT:
 	    /* regexp must have croaked */
-	    PL_savestack_ix -= uv >> SAVE_TIGHT_SHIFT;
-	    break;
 	case SAVEt_ALLOC:
-	    i = SSPOPINT;
-	    PL_savestack_ix -= i;  	/* regexp must have croaked */
+	    PL_savestack_ix -= uv >> SAVE_TIGHT_SHIFT;
 	    break;
 	case SAVEt_STACK_POS:		/* Position on Perl stack */
 	    i = SSPOPINT;
@@ -1084,11 +1108,11 @@ Perl_leave_scope(pTHX_ I32 base)
 
 	case SAVEt_I16:				/* I16 reference */
 	    ptr = SSPOPPTR;
-	    *(I16*)ptr = (I16)SSPOPINT;
+	    *(I16*)ptr = (I16)(uv >> 8);
 	    break;
 	case SAVEt_I8:				/* I8 reference */
 	    ptr = SSPOPPTR;
-	    *(I8*)ptr = (I8)SSPOPINT;
+	    *(I8*)ptr = (I8)(uv >> 8);
 	    break;
 	case SAVEt_DESTRUCTOR:
 	    ptr = SSPOPPTR;