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jq: Backport a bunch of commits in order to fix jq-1.6 terrible performance on startup 

Signed-off-by: François Goudal <francois.goudal@airmont.com>
This commit is contained in:
François Goudal 2021-08-18 23:01:23 +02:00
parent 4952a624f2
commit dca61c0261
10 changed files with 718 additions and 1 deletions
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2
utils/jq/Makefile
View File

@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=jq
PKG_VERSION:=1.6
PKG_RELEASE:=1
PKG_RELEASE:=2
PKG_LICENSE:=BSD
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz

119
utils/jq/patches/0001-Improve-linking-time-by-marking-subtrees-with-unboun.patch Normal file
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@ -0,0 +1,119 @@
From a949ffe9554b5af5614d31b795805f56939a031b Mon Sep 17 00:00:00 2001
From: Muh Muhten <muh.muhten@gmail.com>
Date: Fri, 8 Feb 2019 16:52:04 -0500
Subject: [PATCH 1/9] Improve linking time by marking subtrees with unbound
symbols
---
src/compile.c | 29 +++++++++++++++++++++++++----
1 file changed, 25 insertions(+), 4 deletions(-)
--- a/src/compile.c
+++ b/src/compile.c
@@ -49,9 +49,10 @@ struct inst {
// Unbound instructions (references to other things that may or may not
// exist) are created by "gen_foo_unbound", and bindings are created by
// block_bind(definition, body), which binds all instructions in
- // body which are unboudn and refer to "definition" by name.
+ // body which are unbound and refer to "definition" by name.
struct inst* bound_by;
char* symbol;
+ int any_unbound;
int nformals;
int nactuals;
@@ -73,6 +74,7 @@ static inst* inst_new(opcode op) {
i->bytecode_pos = -1;
i->bound_by = 0;
i->symbol = 0;
+ i->any_unbound = 0;
i->nformals = -1;
i->nactuals = -1;
i->subfn = gen_noop();
@@ -156,6 +158,7 @@ block gen_const_global(jv constant, cons
inst* i = inst_new(STORE_GLOBAL);
i->imm.constant = constant;
i->symbol = strdup(name);
+ i->any_unbound = 0;
return inst_block(i);
}
@@ -211,6 +214,7 @@ block gen_op_unbound(opcode op, const ch
assert(opcode_describe(op)->flags & OP_HAS_BINDING);
inst* i = inst_new(op);
i->symbol = strdup(name);
+ i->any_unbound = 1;
return inst_block(i);
}
@@ -224,6 +228,7 @@ block gen_op_bound(opcode op, block bind
assert(block_is_single(binder));
block b = gen_op_unbound(op, binder.first->symbol);
b.first->bound_by = binder.first;
+ b.first->any_unbound = 0;
return b;
}
@@ -324,7 +329,7 @@ static int block_count_refs(block binder
return nrefs;
}
-static int block_bind_subblock(block binder, block body, int bindflags, int break_distance) {
+static int block_bind_subblock_inner(int* any_unbound, block binder, block body, int bindflags, int break_distance) {
assert(block_is_single(binder));
assert((opcode_describe(binder.first->op)->flags & bindflags) == (bindflags & ~OP_BIND_WILDCARD));
assert(binder.first->symbol);
@@ -336,6 +341,9 @@ static int block_bind_subblock(block bin
binder.first->nformals = block_count_formals(binder);
int nrefs = 0;
for (inst* i = body.first; i; i = i->next) {
+ if (i->any_unbound == 0)
+ continue;
+
int flags = opcode_describe(i->op)->flags;
if ((flags & bindflags) == (bindflags & ~OP_BIND_WILDCARD) && i->bound_by == 0 &&
(!strcmp(i->symbol, binder.first->symbol) ||
@@ -357,14 +365,25 @@ static int block_bind_subblock(block bin
// a break whenever we come across a STOREV of *anonlabel...
break_distance++;
}
+
+ i->any_unbound = (i->symbol && !i->bound_by);
+
// binding recurses into closures
- nrefs += block_bind_subblock(binder, i->subfn, bindflags, break_distance);
+ nrefs += block_bind_subblock_inner(&i->any_unbound, binder, i->subfn, bindflags, break_distance);
// binding recurses into argument list
- nrefs += block_bind_subblock(binder, i->arglist, bindflags, break_distance);
+ nrefs += block_bind_subblock_inner(&i->any_unbound, binder, i->arglist, bindflags, break_distance);
+
+ if (i->any_unbound)
+ *any_unbound = 1;
}
return nrefs;
}
+static int block_bind_subblock(block binder, block body, int bindflags, int break_distance) {
+ int any_unbound;
+ return block_bind_subblock_inner(&any_unbound, binder, body, bindflags, break_distance);
+}
+
static int block_bind_each(block binder, block body, int bindflags) {
assert(block_has_only_binders(binder, bindflags));
bindflags |= OP_HAS_BINDING;
@@ -550,6 +569,7 @@ block gen_function(const char* name, blo
}
i->subfn = body;
i->symbol = strdup(name);
+ i->any_unbound = -1;
i->arglist = formals;
block b = inst_block(i);
block_bind_subblock(b, b, OP_IS_CALL_PSEUDO | OP_HAS_BINDING, 0);
@@ -1081,6 +1101,7 @@ block gen_cbinding(const struct cfunctio
inst* i = inst_new(CLOSURE_CREATE_C);
i->imm.cfunc = &cfunctions[cfunc];
i->symbol = strdup(i->imm.cfunc->name);
+ i->any_unbound = 0;
code = block_bind(inst_block(i), code, OP_IS_CALL_PSEUDO);
}
return code;

85
utils/jq/patches/0002-Reimplement-block_drop_unreferenced-in-linear-time.patch Normal file
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@ -0,0 +1,85 @@
From aab54373e9406ee2a154b8d6166b3045aa3484ee Mon Sep 17 00:00:00 2001
From: Muh Muhten <muh.muhten@gmail.com>
Date: Sat, 9 Feb 2019 17:24:18 -0500
Subject: [PATCH 2/9] Reimplement block_drop_unreferenced in linear time
---
src/compile.c | 50 +++++++++++++++++++++++++++++---------------------
1 file changed, 29 insertions(+), 21 deletions(-)
--- a/src/compile.c
+++ b/src/compile.c
@@ -53,6 +53,7 @@ struct inst {
struct inst* bound_by;
char* symbol;
int any_unbound;
+ int referenced;
int nformals;
int nactuals;
@@ -75,6 +76,7 @@ static inst* inst_new(opcode op) {
i->bound_by = 0;
i->symbol = 0;
i->any_unbound = 0;
+ i->referenced = 0;
i->nformals = -1;
i->nactuals = -1;
i->subfn = gen_noop();
@@ -465,30 +467,36 @@ block block_bind_referenced(block binder
return block_join(refd, body);
}
+static void block_mark_referenced(block body) {
+ int saw_top = 0;
+ for (inst* i = body.last; i; i = i->prev) {
+ if (saw_top && i->bound_by == i && !i->referenced)
+ continue;
+ if (i->op == TOP) {
+ saw_top = 1;
+ }
+ if (i->bound_by) {
+ i->bound_by->referenced = 1;
+ }
+
+ block_mark_referenced(i->arglist);
+ block_mark_referenced(i->subfn);
+ }
+}
+
block block_drop_unreferenced(block body) {
- inst* curr;
+ block_mark_referenced(body);
+
block refd = gen_noop();
- block unrefd = gen_noop();
- int drop;
- do {
- drop = 0;
- while ((curr = block_take(&body)) && curr->op != TOP) {
- block b = inst_block(curr);
- if (block_count_refs(b,refd) + block_count_refs(b,body) == 0) {
- unrefd = BLOCK(unrefd, b);
- drop++;
- } else {
- refd = BLOCK(refd, b);
- }
- }
- if (curr && curr->op == TOP) {
- body = BLOCK(inst_block(curr),body);
+ inst* curr;
+ while ((curr = block_take(&body))) {
+ if (curr->bound_by == curr && !curr->referenced) {
+ inst_free(curr);
+ } else {
+ refd = BLOCK(inst_block(curr), refd);
}
- body = BLOCK(refd, body);
- refd = gen_noop();
- } while (drop != 0);
- block_free(unrefd);
- return body;
+ }
+ return refd;
}
jv block_take_imports(block* body) {

78
utils/jq/patches/0003-Simplify-definition-of-block_bind_referenced.patch Normal file
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@ -0,0 +1,78 @@
From e6676ebbd2ab0a6283d96c797dbe93552c1a222c Mon Sep 17 00:00:00 2001
From: Muh Muhten <muh.muhten@gmail.com>
Date: Mon, 18 Feb 2019 21:00:59 -0500
Subject: [PATCH 3/9] Simplify definition of block_bind_referenced
---
src/compile.c | 49 ++++++++-----------------------------------------
1 file changed, 8 insertions(+), 41 deletions(-)
--- a/src/compile.c
+++ b/src/compile.c
@@ -317,20 +317,6 @@ static int block_count_actuals(block b)
return args;
}
-static int block_count_refs(block binder, block body) {
- int nrefs = 0;
- for (inst* i = body.first; i; i = i->next) {
- if (i != binder.first && i->bound_by == binder.first) {
- nrefs++;
- }
- // counting recurses into closures
- nrefs += block_count_refs(binder, i->subfn);
- // counting recurses into argument list
- nrefs += block_count_refs(binder, i->arglist);
- }
- return nrefs;
-}
-
static int block_bind_subblock_inner(int* any_unbound, block binder, block body, int bindflags, int break_distance) {
assert(block_is_single(binder));
assert((opcode_describe(binder.first->op)->flags & bindflags) == (bindflags & ~OP_BIND_WILDCARD));
@@ -434,37 +420,18 @@ block block_bind_library(block binder, b
return body; // We don't return a join because we don't want those sticking around...
}
-// Bind binder to body and throw away any defs in binder not referenced
-// (directly or indirectly) from body.
+// Bind binder to body, then throw it away if not referenced.
block block_bind_referenced(block binder, block body, int bindflags) {
+ assert(block_is_single(binder));
assert(block_has_only_binders(binder, bindflags));
bindflags |= OP_HAS_BINDING;
- block refd = gen_noop();
- block unrefd = gen_noop();
- int nrefs;
- for (int last_kept = 0, kept = 0; ; ) {
- for (inst* curr; (curr = block_take(&binder));) {
- block b = inst_block(curr);
- nrefs = block_bind_each(b, body, bindflags);
- // Check if this binder is referenced from any of the ones we
- // already know are referenced by body.
- nrefs += block_count_refs(b, refd);
- nrefs += block_count_refs(b, body);
- if (nrefs) {
- refd = BLOCK(refd, b);
- kept++;
- } else {
- unrefd = BLOCK(unrefd, b);
- }
- }
- if (kept == last_kept)
- break;
- last_kept = kept;
- binder = unrefd;
- unrefd = gen_noop();
+
+ if (block_bind_subblock(binder, body, bindflags, 0) == 0) {
+ block_free(binder);
+ } else {
+ body = BLOCK(binder, body);
}
- block_free(unrefd);
- return block_join(refd, body);
+ return body;
}
static void block_mark_referenced(block body) {

40
utils/jq/patches/0004-Pass-on-the-error-message-when-rel_path-is-invalid.patch Normal file
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@ -0,0 +1,40 @@
From 2e3dbb884199bba6cc07345f6d394f1ac53465ac Mon Sep 17 00:00:00 2001
From: Muh Muhten <muh.muhten@gmail.com>
Date: Tue, 19 Feb 2019 00:34:04 -0500
Subject: [PATCH 4/9] Pass on the error message when rel_path is invalid
"Module path must be a string" is not a useful error message when the
reason the module path isn't a string is because the string it was got
replaced with an invalid with an error message for some other reason.
Also fixes a few memory leaks on early exits.
---
src/linker.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
--- a/src/linker.c
+++ b/src/linker.c
@@ -138,10 +138,20 @@ static jv jv_basename(jv name) {
// Asummes validated relative path to module
static jv find_lib(jq_state *jq, jv rel_path, jv search, const char *suffix, jv jq_origin, jv lib_origin) {
- if (jv_get_kind(search) != JV_KIND_ARRAY)
- return jv_invalid_with_msg(jv_string_fmt("Module search path must be an array"));
- if (jv_get_kind(rel_path) != JV_KIND_STRING)
+ if (!jv_is_valid(rel_path)) {
+ jv_free(search);
+ return rel_path;
+ }
+ if (jv_get_kind(rel_path) != JV_KIND_STRING) {
+ jv_free(rel_path);
+ jv_free(search);
return jv_invalid_with_msg(jv_string_fmt("Module path must be a string"));
+ }
+ if (jv_get_kind(search) != JV_KIND_ARRAY) {
+ jv_free(rel_path);
+ jv_free(search);
+ return jv_invalid_with_msg(jv_string_fmt("Module search path must be an array"));
+ }
struct stat st;
int ret;

50
utils/jq/patches/0005-Catch-.-as-the-first-component-of-a-module-path.patch Normal file
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@ -0,0 +1,50 @@
From d0fe86177427e0c3bc2cec1436d74472e4b618dd Mon Sep 17 00:00:00 2001
From: Muh Muhten <muh.muhten@gmail.com>
Date: Tue, 19 Feb 2019 00:35:40 -0500
Subject: [PATCH 5/9] Catch .. as the first component of a module path
Only the second and subsequent path components were being checked, which
I guess is theoretically security-relevant.
There's no apparent point to reconstructing the path after splitting it
by adding /s back in, either.
---
src/linker.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
--- a/src/linker.c
+++ b/src/linker.c
@@ -98,12 +98,9 @@ static jv validate_relpath(jv name) {
return res;
}
jv components = jv_string_split(jv_copy(name), jv_string("/"));
- jv rp = jv_array_get(jv_copy(components), 0);
- components = jv_array_slice(components, 1, jv_array_length(jv_copy(components)));
jv_array_foreach(components, i, x) {
if (!strcmp(jv_string_value(x), "..")) {
jv_free(x);
- jv_free(rp);
jv_free(components);
jv res = jv_invalid_with_msg(jv_string_fmt("Relative paths to modules may not traverse to parent directories (%s)", s));
jv_free(name);
@@ -111,18 +108,16 @@ static jv validate_relpath(jv name) {
}
if (i > 0 && jv_equal(jv_copy(x), jv_array_get(jv_copy(components), i - 1))) {
jv_free(x);
- jv_free(rp);
jv_free(components);
jv res = jv_invalid_with_msg(jv_string_fmt("module names must not have equal consecutive components: %s",
jv_string_value(name)));
jv_free(name);
return res;
}
- rp = jv_string_concat(rp, jv_string_concat(jv_string("/"), x));
+ jv_free(x);
}
jv_free(components);
- jv_free(name);
- return rp;
+ return name;
}
// Assumes name has been validated

37
utils/jq/patches/0006-Replace-TOP-before-imports-special-case-with-assert.patch Normal file
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@ -0,0 +1,37 @@
From a114b871e460ef2ddcf7698bc6b18651c976626a Mon Sep 17 00:00:00 2001
From: Muh Muhten <muh.muhten@gmail.com>
Date: Tue, 19 Feb 2019 00:14:53 -0500
Subject: [PATCH 6/9] Replace TOP-before-imports special case with assert
The case isn't actually possible afaict.
---
src/compile.c | 11 ++++-------
1 file changed, 4 insertions(+), 7 deletions(-)
--- a/src/compile.c
+++ b/src/compile.c
@@ -469,10 +469,10 @@ block block_drop_unreferenced(block body
jv block_take_imports(block* body) {
jv imports = jv_array();
- inst* top = NULL;
- if (body->first && body->first->op == TOP) {
- top = block_take(body);
- }
+ /* Parser should never generate TOP before imports */
+ assert(!(body->first && body->first->op == TOP && body->first->next &&
+ (body->first->next->op == MODULEMETA || body->first->next->op == DEPS)));
+
while (body->first && (body->first->op == MODULEMETA || body->first->op == DEPS)) {
inst* dep = block_take(body);
if (dep->op == DEPS) {
@@ -480,9 +480,6 @@ jv block_take_imports(block* body) {
}
inst_free(dep);
}
- if (top) {
- *body = block_join(inst_block(top),*body);
- }
return imports;
}

39
utils/jq/patches/0007-Add-import-metadata-key-optional.patch Normal file
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@ -0,0 +1,39 @@
From 90b92d8c73446bb50eee14ca8d88c5224002001a Mon Sep 17 00:00:00 2001
From: Muh Muhten <muh.muhten@gmail.com>
Date: Sun, 15 Oct 2017 01:57:17 -0400
Subject: [PATCH 7/9] Add import metadata key "optional"
A library marked is imported if found, but silently skipped if missing.
This is the desired semantic for the auto-include at ~/.jq
---
src/linker.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
--- a/src/linker.c
+++ b/src/linker.c
@@ -246,6 +246,9 @@ static int process_dependencies(jq_state
jv v = jv_object_get(jv_copy(dep), jv_string("raw"));
if (jv_get_kind(v) == JV_KIND_TRUE)
raw = 1;
+ int optional = 0;
+ if (jv_get_kind(jv_object_get(jv_copy(dep), jv_string("optional"))) == JV_KIND_TRUE)
+ optional = 1;
jv_free(v);
jv relpath = validate_relpath(jv_object_get(jv_copy(dep), jv_string("relpath")));
jv as = jv_object_get(jv_copy(dep), jv_string("as"));
@@ -259,10 +262,14 @@ static int process_dependencies(jq_state
jv resolved = find_lib(jq, relpath, search, is_data ? ".json" : ".jq", jv_copy(jq_origin), jv_copy(lib_origin));
// XXX ...move the rest of this into a callback.
if (!jv_is_valid(resolved)) {
+ jv_free(as);
+ if (optional) {
+ jv_free(resolved);
+ continue;
+ }
jv emsg = jv_invalid_get_msg(resolved);
jq_report_error(jq, jv_string_fmt("jq: error: %s\n",jv_string_value(emsg)));
jv_free(emsg);
- jv_free(as);
jv_free(deps);
jv_free(jq_origin);
jv_free(lib_origin);

99
utils/jq/patches/0008-Load-.jq-as-a-library-instead-of-with-builtins.patch Normal file
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@ -0,0 +1,99 @@
From 4c5a08b9e01ebfce5c8914dd82c1722737bbecab Mon Sep 17 00:00:00 2001
From: Muh Muhten <muh.muhten@gmail.com>
Date: Tue, 19 Feb 2019 00:39:34 -0500
Subject: [PATCH 8/9] Load ~/.jq as a library instead of with builtins
Remove the special code which loads ~/.jq in builtin.c, and instead glue
an optional include which points to the same file onto the main program
in linker.c.
Fixes a minor bug where errors in ~/.jq would be labelled <builtin>.
---
src/builtin.c | 44 +++++++-------------------------------------
src/linker.c | 10 ++++++++++
2 files changed, 17 insertions(+), 37 deletions(-)
--- a/src/builtin.c
+++ b/src/builtin.c
@@ -1706,9 +1706,7 @@ static block bind_bytecoded_builtins(blo
return block_bind(builtins, b, OP_IS_CALL_PSEUDO);
}
-
-
-static const char* const jq_builtins =
+static const char jq_builtins[] =
/* Include jq-coded builtins */
#include "src/builtin.inc"
@@ -1744,45 +1742,17 @@ static block gen_builtin_list(block buil
return BLOCK(builtins, gen_function("builtins", gen_noop(), gen_const(list)));
}
-static int builtins_bind_one(jq_state *jq, block* bb, const char* code) {
- struct locfile* src;
- src = locfile_init(jq, "<builtin>", code, strlen(code));
- block funcs;
- int nerrors = jq_parse_library(src, &funcs);
- if (nerrors == 0) {
- *bb = block_bind(funcs, *bb, OP_IS_CALL_PSEUDO);
- }
- locfile_free(src);
- return nerrors;
-}
-
-static int slurp_lib(jq_state *jq, block* bb) {
- int nerrors = 0;
- char* home = getenv("HOME");
- if (home) { // silently ignore no $HOME
- jv filename = jv_string_append_str(jv_string(home), "/.jq");
- jv data = jv_load_file(jv_string_value(filename), 1);
- if (jv_is_valid(data)) {
- nerrors = builtins_bind_one(jq, bb, jv_string_value(data) );
- }
- jv_free(filename);
- jv_free(data);
- }
- return nerrors;
-}
-
int builtins_bind(jq_state *jq, block* bb) {
- block builtins = gen_noop();
- int nerrors = slurp_lib(jq, bb);
- if (nerrors) {
- block_free(*bb);
- return nerrors;
- }
- nerrors = builtins_bind_one(jq, &builtins, jq_builtins);
+ block builtins;
+ struct locfile* src = locfile_init(jq, "<builtin>", jq_builtins, sizeof(jq_builtins)-1);
+ int nerrors = jq_parse_library(src, &builtins);
assert(!nerrors);
+ locfile_free(src);
+
builtins = bind_bytecoded_builtins(builtins);
builtins = gen_cbinding(function_list, sizeof(function_list)/sizeof(function_list[0]), builtins);
builtins = gen_builtin_list(builtins);
+
*bb = block_bind(builtins, *bb, OP_IS_CALL_PSEUDO);
*bb = block_drop_unreferenced(*bb);
return nerrors;
--- a/src/linker.c
+++ b/src/linker.c
@@ -387,6 +387,16 @@ int load_program(jq_state *jq, struct lo
if (nerrors)
return nerrors;
+ char* home = getenv("HOME");
+ if (home) { // silently ignore no $HOME
+ /* Import ~/.jq as a library named "" found in $HOME */
+ block import = gen_import_meta(gen_import("", NULL, 0),
+ gen_const(JV_OBJECT(
+ jv_string("optional"), jv_true(),
+ jv_string("search"), jv_string(home))));
+ program = BLOCK(import, program);
+ }
+
nerrors = process_dependencies(jq, jq_get_jq_origin(jq), jq_get_prog_origin(jq), &program, &lib_state);
block libs = gen_noop();
for (uint64_t i = 0; i < lib_state.ct; ++i) {

170
utils/jq/patches/0009-Make-builtin-binding-fast-again-by-binding-only-refe.patch Normal file
View File

@ -0,0 +1,170 @@
From 916c12fb593005771a6ce098f5a7da4dec0051d1 Mon Sep 17 00:00:00 2001
From: Muh Muhten <muh.muhten@gmail.com>
Date: Wed, 20 Feb 2019 01:48:56 -0500
Subject: [PATCH 9/9] Make builtin binding fast again by binding only
referenced symbols
Avoid doing the internal binding of top-level symbols in the parser,
leaving that work to be done in a post-processing step. For builtins,
this lets us do a reference-aware bind step (block_bind_incremental)
*after* generating builtins/0.
Libraries are a bit trickier since they may be bound multiple times, so
instead of thinking through the implications I added (block_bind_self)
to resolve all internal symbols immediately.
---
src/builtin.c | 4 ++--
src/compile.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++----
src/compile.h | 3 ++-
src/linker.c | 1 +
src/parser.c | 2 +-
src/parser.y | 2 +-
6 files changed, 54 insertions(+), 9 deletions(-)
--- a/src/builtin.c
+++ b/src/builtin.c
@@ -1703,7 +1703,7 @@ static block bind_bytecoded_builtins(blo
BLOCK(gen_param("start"), gen_param("end")),
range));
}
- return block_bind(builtins, b, OP_IS_CALL_PSEUDO);
+ return BLOCK(builtins, b);
}
static const char jq_builtins[] =
@@ -1753,7 +1753,7 @@ int builtins_bind(jq_state *jq, block* b
builtins = gen_cbinding(function_list, sizeof(function_list)/sizeof(function_list[0]), builtins);
builtins = gen_builtin_list(builtins);
- *bb = block_bind(builtins, *bb, OP_IS_CALL_PSEUDO);
+ *bb = block_bind_incremental(builtins, *bb, OP_IS_CALL_PSEUDO);
*bb = block_drop_unreferenced(*bb);
return nerrors;
}
--- a/src/compile.c
+++ b/src/compile.c
@@ -222,8 +222,9 @@ block gen_op_unbound(opcode op, const ch
block gen_op_var_fresh(opcode op, const char* name) {
assert(opcode_describe(op)->flags & OP_HAS_VARIABLE);
- return block_bind(gen_op_unbound(op, name),
- gen_noop(), OP_HAS_VARIABLE);
+ block b = gen_op_unbound(op, name);
+ b.first->bound_by = b.first;
+ return b;
}
block gen_op_bound(opcode op, block binder) {
@@ -382,7 +383,7 @@ static int block_bind_each(block binder,
return nrefs;
}
-block block_bind(block binder, block body, int bindflags) {
+static block block_bind(block binder, block body, int bindflags) {
block_bind_each(binder, body, bindflags);
return block_join(binder, body);
}
@@ -434,6 +435,48 @@ block block_bind_referenced(block binder
return body;
}
+static inst* block_take_last(block* b) {
+ inst* i = b->last;
+ if (i == 0)
+ return 0;
+ if (i->prev) {
+ i->prev->next = i->next;
+ b->last = i->prev;
+ i->prev = 0;
+ } else {
+ b->first = 0;
+ b->last = 0;
+ }
+ return i;
+}
+
+// Binds a sequence of binders, which *must not* alrady be bound to each other,
+// to body, throwing away unreferenced defs
+block block_bind_incremental(block binder, block body, int bindflags) {
+ assert(block_has_only_binders(binder, bindflags));
+ bindflags |= OP_HAS_BINDING;
+
+ inst* curr;
+ while ((curr = block_take_last(&binder))) {
+ body = block_bind_referenced(inst_block(curr), body, bindflags);
+ }
+ return body;
+}
+
+block block_bind_self(block binder, int bindflags) {
+ assert(block_has_only_binders(binder, bindflags));
+ bindflags |= OP_HAS_BINDING;
+ block body = gen_noop();
+
+ inst* curr;
+ while ((curr = block_take_last(&binder))) {
+ block b = inst_block(curr);
+ block_bind_subblock(b, body, bindflags, 0);
+ body = BLOCK(b, body);
+ }
+ return body;
+}
+
static void block_mark_referenced(block body) {
int saw_top = 0;
for (inst* i = body.last; i; i = i->prev) {
@@ -1074,7 +1117,7 @@ block gen_cbinding(const struct cfunctio
i->imm.cfunc = &cfunctions[cfunc];
i->symbol = strdup(i->imm.cfunc->name);
i->any_unbound = 0;
- code = block_bind(inst_block(i), code, OP_IS_CALL_PSEUDO);
+ code = BLOCK(inst_block(i), code);
}
return code;
}
--- a/src/compile.h
+++ b/src/compile.h
@@ -72,9 +72,10 @@ int block_has_only_binders(block, int bi
int block_has_main(block);
int block_is_funcdef(block b);
int block_is_single(block b);
-block block_bind(block binder, block body, int bindflags);
block block_bind_library(block binder, block body, int bindflags, const char* libname);
block block_bind_referenced(block binder, block body, int bindflags);
+block block_bind_incremental(block binder, block body, int bindflags);
+block block_bind_self(block binder, int bindflags);
block block_drop_unreferenced(block body);
jv block_take_imports(block* body);
--- a/src/linker.c
+++ b/src/linker.c
@@ -336,6 +336,7 @@ static int load_library(jq_state *jq, jv
jv_string(dirname(lib_origin)),
&program, lib_state);
free(lib_origin);
+ program = block_bind_self(program, OP_IS_CALL_PSEUDO);
}
}
state_idx = lib_state->ct++;
--- a/src/parser.c
+++ b/src/parser.c
@@ -2425,7 +2425,7 @@ yyreduce:
case 9:
#line 333 "src/parser.y" /* yacc.c:1646 */
{
- (yyval.blk) = block_bind((yyvsp[-1].blk), (yyvsp[0].blk), OP_IS_CALL_PSEUDO);
+ (yyval.blk) = block_join((yyvsp[-1].blk), (yyvsp[0].blk));
}
#line 2431 "src/parser.c" /* yacc.c:1646 */
break;
--- a/src/parser.y
+++ b/src/parser.y
@@ -331,7 +331,7 @@ FuncDefs:
$$ = gen_noop();
} |
FuncDef FuncDefs {
- $$ = block_bind($1, $2, OP_IS_CALL_PSEUDO);
+ $$ = block_join($1, $2);
}
Exp: