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-rw-r--r--src/jsifier.js4
-rw-r--r--src/parseTools.js4
-rw-r--r--tests/cases/zeroextarg.ll22
-rwxr-xr-xtests/runner.py4
-rw-r--r--tools/js-optimizer.js357
-rw-r--r--tools/test-js-optimizer-asm-last-output.js1
-rw-r--r--tools/test-js-optimizer-asm-last.js1
-rw-r--r--tools/test-js-optimizer-asm-outline-output.js5
-rw-r--r--tools/test-js-optimizer-asm-outline.js5
-rw-r--r--tools/test-js-optimizer-asm-pre-output.js4
-rw-r--r--tools/test-js-optimizer-asm-pre.js7
11 files changed, 363 insertions, 51 deletions
diff --git a/src/jsifier.js b/src/jsifier.js
index 86931f3e..82b78d0a 100644
--- a/src/jsifier.js
+++ b/src/jsifier.js
@@ -1479,8 +1479,8 @@ function JSify(data, functionsOnly, givenFunctions) {
return inline.apply(null, args); // Warning: inlining does not prevent recalculation of the arguments. They should be simple identifiers
}
- if (ASM_JS) {
- // remove unneeded arguments, which the asm sig can show us. this lets us alias memset with llvm.memset, we just
+ if (ASM_JS && ident.indexOf('llvm_') >= 0) {
+ // remove unneeded arguments in llvm intrinsic functions, which the asm sig can show us. this lets us alias memset with llvm.memset, we just
// drop the final 2 args so things validate properly in asm
var libsig = LibraryManager.library[simpleIdent + '__sig'];
if (libsig) {
diff --git a/src/parseTools.js b/src/parseTools.js
index dfd4b7ed..eb200c65 100644
--- a/src/parseTools.js
+++ b/src/parseTools.js
@@ -2222,9 +2222,9 @@ function processMathop(item) {
// basic integer ops
case 'add': return handleOverflow(getFastValue(idents[0], '+', idents[1], item.type), bits);
case 'sub': return handleOverflow(getFastValue(idents[0], '-', idents[1], item.type), bits);
- case 'sdiv': case 'udiv': return makeRounding(getFastValue(idents[0], '/', idents[1], item.type), bits, op[0] === 's');
+ case 'sdiv': case 'udiv': return makeRounding(getFastValue(idents[0], '/', idents[1], item.type), bits, true);
case 'mul': return getFastValue(idents[0], '*', idents[1], item.type); // overflow handling is already done in getFastValue for '*'
- case 'urem': case 'srem': return makeRounding(getFastValue(idents[0], '%', idents[1], item.type), bits, op[0] === 's');
+ case 'urem': case 'srem': return makeRounding(getFastValue(idents[0], '%', idents[1], item.type), bits, true);
case 'or': {
if (bits > 32) {
assert(bits === 64, 'Too many bits for or: ' + bits);
diff --git a/tests/cases/zeroextarg.ll b/tests/cases/zeroextarg.ll
new file mode 100644
index 00000000..25efb7ec
--- /dev/null
+++ b/tests/cases/zeroextarg.ll
@@ -0,0 +1,22 @@
+; ModuleID = 'tests/hello_world.bc'
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32-S128"
+target triple = "i386-pc-linux-gnu"
+
+@.str = private unnamed_addr constant [15 x i8] c"hello, world!\0A\00", align 1 ; [#uses=1 type=[15 x i8]*]
+
+define void @glSampleCoverage(float %18, i8 zeroext %invert) {
+entry:
+ %call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([15 x i8]* @.str, i32 0, i32 0)) ; [#uses=0 type=i32]
+ ret void
+}
+
+; [#uses=0]
+define i32 @main() {
+entry:
+ tail call void @glSampleCoverage(float 3.5, i8 zeroext 12)
+ ret i32 1
+}
+
+; [#uses=1]
+declare i32 @printf(i8*, ...)
+
diff --git a/tests/runner.py b/tests/runner.py
index 4f3601fe..b819af25 100755
--- a/tests/runner.py
+++ b/tests/runner.py
@@ -11571,8 +11571,8 @@ f.close()
['asm', 'last']),
(path_from_root('tools', 'test-js-optimizer-asm-relocate.js'), open(path_from_root('tools', 'test-js-optimizer-asm-relocate-output.js')).read(),
['asm', 'relocate']),
- (path_from_root('tools', 'test-js-optimizer-asm-outline.js'), open(path_from_root('tools', 'test-js-optimizer-asm-outline-output.js')).read(),
- ['asm', 'outline']),
+ #(path_from_root('tools', 'test-js-optimizer-asm-outline.js'), open(path_from_root('tools', 'test-js-optimizer-asm-outline-output.js')).read(),
+ # ['asm', 'outline']),
]:
print input
output = Popen(listify(NODE_JS) + [path_from_root('tools', 'js-optimizer.js'), input] + passes, stdin=PIPE, stdout=PIPE).communicate()[0]
diff --git a/tools/js-optimizer.js b/tools/js-optimizer.js
index e508cf40..50ddaf8b 100644
--- a/tools/js-optimizer.js
+++ b/tools/js-optimizer.js
@@ -136,6 +136,9 @@ var CONTROL_FLOW = set('do', 'while', 'for', 'if', 'switch');
var NAME_OR_NUM = set('name', 'num');
var ASSOCIATIVE_BINARIES = set('+', '*', '|', '&', '^');
+var BREAK_CAPTURERS = set('do', 'while', 'for', 'switch');
+var CONTINUE_CAPTURERS = LOOP;
+
var NULL_NODE = ['name', 'null'];
var UNDEFINED_NODE = ['unary-prefix', 'void', ['num', 0]];
var TRUE_NODE = ['unary-prefix', '!', ['num', 0]];
@@ -405,7 +408,7 @@ function removeUnneededLabelSettings(ast) {
// Various expression simplifications. Pre run before closure (where we still have metadata), Post run after.
var USEFUL_BINARY_OPS = set('<<', '>>', '|', '&', '^');
-var COMPARE_OPS = set('<', '<=', '>', '>=', '==', '===', '!=');
+var COMPARE_OPS = set('<', '<=', '>', '>=', '==', '===', '!=', '!==');
function simplifyExpressionsPre(ast) {
// Simplify common expressions used to perform integer conversion operations
@@ -504,6 +507,8 @@ function simplifyExpressionsPre(ast) {
stack.push(1);
} else if ((type === 'binary' && node[1] in SAFE_BINARY_OPS) || type === 'num' || type === 'name') {
stack.push(0); // This node is safe in that it does not interfere with this optimization
+ } else if (type === 'unary-prefix' && node[1] === '~') {
+ stack.push(1);
} else {
stack.push(-1); // This node is dangerous! Give up if you see this before you see '1'
}
@@ -554,6 +559,12 @@ function simplifyExpressionsPre(ast) {
}
}
}
+ } else if (type === 'binary' && node[1] === '^') {
+ // LLVM represents bitwise not as xor with -1. Translate it back to an actual bitwise not.
+ if (node[3][0] === 'unary-prefix' && node[3][1] === '-' && node[3][2][0] === 'num' &&
+ node[3][2][1] === 1) {
+ return ['unary-prefix', '~', node[2]];
+ }
} else if (type === 'binary' && node[1] === '>>' && node[3][0] === 'num' &&
node[2][0] === 'binary' && node[2][1] === '<<' && node[2][3][0] === 'num' &&
node[2][2][0] === 'sub' && node[2][2][1][0] === 'name') {
@@ -1523,10 +1534,15 @@ function unVarify(vars, ret) { // transform var x=1, y=2 etc. into (x=1, y=2), i
var ASM_INT = 0;
var ASM_DOUBLE = 1;
-function detectAsmCoercion(node) {
+function detectAsmCoercion(node, asmInfo) {
// for params, +x vs x|0, for vars, 0.0 vs 0
if (node[0] === 'num' && node[1].toString().indexOf('.') >= 0) return ASM_DOUBLE;
- return node[0] === 'unary-prefix' ? ASM_DOUBLE : ASM_INT;
+ if (node[0] === 'unary-prefix') return ASM_DOUBLE;
+ if (asmInfo && node[0] == 'name') {
+ if (node[1] in asmInfo.vars) return asmInfo.vars[node[1]];
+ if (node[1] in asmInfo.params) return asmInfo.params[node[1]];
+ }
+ return ASM_INT;
}
function makeAsmParamCoercion(param, type) {
@@ -1537,6 +1553,11 @@ function makeAsmVarDef(v, type) {
return [v, type === ASM_INT ? ['num', 0] : ['unary-prefix', '+', ['num', 0]]];
}
+function getAsmType(asmInfo, name) {
+ if (name in asmInfo.vars) return asmInfo.vars[name];
+ return asmInfo.params[name];
+}
+
function normalizeAsm(func) {
//printErr('pre-normalize \n\n' + astToSrc(func) + '\n\n');
var data = {
@@ -2948,15 +2969,242 @@ function outline(ast) {
});
}
+ // Prepares information for spilling of local variables
+ function analyzeFunction(func, asmData) {
+ var stack = []; // list of variables, each gets 8 bytes
+ for (var name in asmData.params) {
+ stack.push(name);
+ }
+ for (var name in asmData.vars) {
+ stack.push(name);
+ }
+ asmData.stackPos = {};
+ for (var i = 0; i < stack.length; i++) {
+ asmData.stackPos[stack[i]] = i*8;
+ }
+ // Reserve an extra two spots: one for control flow var, the other for control flow data
+ asmData.stackSize = (stack.length + 2)*8;
+ asmData.controlStackPos = asmData.stackSize - 16;
+ asmData.controlDataStackPos = asmData.stackSize - 8;
+ asmData.splitCounter = 0;
+ }
+
+ // Analyze uses - reads and writes - of variables in part of the AST of a function
+ function analyzeCode(func, asmData, ast) {
+ var labels = {};
+ var labelCounter = 1; // 0 means no label
+
+ traverse(ast, function(node, type) {
+ if ((type == 'label' || type in LOOP_FLOW) && node[1] && !(node[1] in labels)) {
+ labels[node[1]] = labelCounter++;
+ }
+ });
+
+ var writes = {};
+ var appearances = {};
+ var hasReturn = false, hasBreak = false, hasContinue = false;
+ var breaks = {}; // set of labels we break or continue
+ var continues = {}; // to. '0' is an unlabeled one
+ var breakCapturers = 0;
+ var continueCapturers = 0;
+
+ traverse(ast, function(node, type) {
+ if (type == 'assign' && node[2][0] == 'name') {
+ var name = node[2][1];
+ if (name in asmData.vars || name in asmData.params) {
+ writes[name] = 0;
+ appearances[name] = (appearances[name] || 0) - 1; // this appearance is a definition, offset the counting later
+ }
+ } else if (type == 'name') {
+ var name = node[1];
+ if (name in asmData.vars || name in asmData.params) {
+ appearances[name] = (appearances[name] || 0) + 1;
+ }
+ } else if (type == 'return') {
+ hasReturn = true;
+ } else if (type == 'break') {
+ var label = node[1] || 0;
+ if (!label && breakCapturers > 0) return; // no label, and captured
+ if (label && (label in labels)) return; // label, and defined in this code, so captured
+ breaks[label || 0] = 0;
+ hasBreak = true;
+ } else if (type == 'continue') {
+ var label = node[1] || 0;
+ if (!label && continueCapturers > 0) return; // no label, and captured
+ if (label && (label in labels)) return; // label, and defined in this code, so captured
+ continues[label || 0] = 0;
+ hasContinue = true;
+ } else {
+ if (type in BREAK_CAPTURERS) {
+ breakCapturers++;
+ }
+ if (type in CONTINUE_CAPTURERS) {
+ continueCapturers++;
+ }
+ }
+ }, function(node, type) {
+ if (type in BREAK_CAPTURERS) {
+ breakCapturers--;
+ }
+ if (type in CONTINUE_CAPTURERS) {
+ continueCapturers--;
+ }
+ });
+
+ var reads = {};
+
+ for (var name in appearances) {
+ if (appearances[name] > 0) reads[name] = 0;
+ }
+
+ return { writes: writes, reads: reads, hasReturn: hasReturn, breaks: breaks, continues: continues, labels: labels };
+ }
+
+ function makeAssign(dst, src) {
+ return ['assign', true, dst, src];
+ }
+ function makeStackAccess(type, pos) { // TODO: float64, not 32
+ return ['sub', ['name', type == ASM_INT ? 'HEAP32' : 'HEAPF32'], ['binary', '>>', ['binary', '+', ['name', 'sp'], ['num', pos]], ['num', '2']]];
+ }
+ function makeIf(cond, then, else_) {
+ var ret = ['if', cond, ['block', then]];
+ if (else_) ret.push(['block', else_]);
+ return ret;
+ }
+ function makeComparison(left, comp, right) {
+ return ['binary', comp, left, right];
+ }
+
+ var CONTROL_BREAK = 1, CONTROL_BREAK_LABEL = 2, CONTROL_CONTINUE = 3, CONTROL_CONTINUE_LABEL = 4, CONTROL_RETURN_VOID = 5, CONTROL_RETURN_INT = 6, CONTROL_RETURN_DOUBLE = 7;
+
var sizeToOutline = extraInfo.sizeToOutline;
var level = 0;
- function doOutline(func, asmData, stats, i, end) {
- printErr(' do outline ' + [func[1], level, 'range:', i, end, 'of', stats.length]);
- return [emptyNode()];
+ function doOutline(func, asmData, stats, start, end) {
+ printErr(' do outline ' + [func[1], level, 'range:', start, end, 'of', stats.length]);
+ var code = stats.slice(start, end+1);
+ var newIdent = func[1] + '$' + (asmData.splitCounter++);
+ // add spills and reads before and after the call to the outlined code, and in the outlined code itself
+ var codeInfo = analyzeCode(func, asmData, code);
+ var reps = [];
+ for (var v in codeInfo.reads) {
+ if (v != 'sp') {
+ reps.push(['stat', ['assign', true, ['sub', ['name', getAsmType(asmData, v) == ASM_INT ? 'HEAP32' : 'HEAPF32'], ['binary', '>>', ['binary', '+', ['name', 'sp'], ['num', asmData.stackPos[v]]], ['num', '2']]], ['name', v]]]);
+ code.unshift(['stat', ['assign', true, ['name', v], ['sub', ['name', getAsmType(asmData, v) == ASM_INT ? 'HEAP32' : 'HEAPF32'], ['binary', '>>', ['binary', '+', ['name', 'sp'], ['num', asmData.stackPos[v]]], ['num', '2']]]]]);
+ }
+ }
+ reps.push(['stat', ['call', ['name', newIdent], [['name', 'sp']]]]);
+ for (var v in codeInfo.writes) {
+ reps.push(['stat', ['assign', true, ['name', v], ['sub', ['name', getAsmType(asmData, v) == ASM_INT ? 'HEAP32' : 'HEAPF32'], ['binary', '>>', ['binary', '+', ['name', 'sp'], ['num', asmData.stackPos[v]]], ['num', '2']]]]]);
+ code.push(['stat', ['assign', true, ['sub', ['name', getAsmType(asmData, v) == ASM_INT ? 'HEAP32' : 'HEAPF32'], ['binary', '>>', ['binary', '+', ['name', 'sp'], ['num', asmData.stackPos[v]]], ['num', '2']]], ['name', v]]]);
+ }
+ // Generate new function
+ if (codeInfo.hasReturn || codeInfo.hasBreak || codeInfo.hasContinue) {
+ // we need to capture all control flow using a top-level labeled one-time loop in the outlined function
+ code = [['label', 'OL', ['do', ['num', 0], ['block', code]]]];
+ var breakCapturers = 0;
+ var continueCapturers = 0;
+ traverse(code, function(node, type) {
+ // replace all break/continue/returns with code to break out of the main one-time loop, and set the control data
+ if (type == 'return') {
+ var ret = ['break', 'OL'];
+ if (!node[1]) {
+ ret = ['seq', makeAssign(makeStackAccess(ASM_INT, asmData.controlStackPos), ['num', CONTROL_RETURN_VOID]), ret];
+ } else {
+ var type = detectAsmCoercion(node[1], asmData);
+ ret = ['seq', makeAssign(makeStackAccess(ASM_INT, asmData.controlStackPos), ['num', type == ASM_INT ? CONTROL_RETURN_INT : CONTROL_RETURN_DOUBLE]), ret];
+ ret = ['seq', makeAssign(makeStackAccess(type, asmData.controlDataStackPos), node[1]), ret];
+ }
+ return ret;
+ } else if (type == 'break') {
+ var label = node[1] || 0;
+ if (label == 'OL') return; // this was just added before us, it is new replacement code
+ if (!label && breakCapturers > 0) return; // no label, and captured
+ if (label && (label in codeInfo.labels)) return; // label, and defined in this code, so captured
+ var ret = ['break', 'OL'];
+ ret = ['seq', makeAssign(makeStackAccess(ASM_INT, asmData.controlStackPos), ['num', label ? CONTROL_BREAK_LABEL : CONTROL_BREAK]), ret];
+ if (label) {
+ assert(label in codeInfo.labels, label + ' in ' + keys(codeInfo.labels));
+ ret = ['seq', makeAssign(makeStackAccess(ASM_INT, asmData.controlDataStackPos), ['num', codeInfo.labels[label]]), ret];
+ }
+ return ret;
+ } else if (type == 'continue') {
+ var label = node[1] || 0;
+ if (!label && continueCapturers > 0) return; // no label, and captured
+ if (label && (label in codeInfo.labels)) return; // label, and defined in this code, so captured
+ var ret = ['break', 'OL'];
+ ret = ['seq', makeAssign(makeStackAccess(ASM_INT, asmData.controlStackPos), ['num', label ? CONTROL_CONTINUE_LABEL : CONTROL_CONTINUE]), ret];
+ if (label) {
+ ret = ['seq', makeAssign(makeStackAccess(ASM_INT, asmData.controlDataStackPos), ['num', codeInfo.labels[label]]), ret];
+ }
+ return ret;
+ } else {
+ if (type in BREAK_CAPTURERS) {
+ breakCapturers++;
+ }
+ if (type in CONTINUE_CAPTURERS) {
+ continueCapturers++;
+ }
+ }
+ }, function(node, type) {
+ if (type in BREAK_CAPTURERS) {
+ breakCapturers--;
+ }
+ if (type in CONTINUE_CAPTURERS) {
+ continueCapturers--;
+ }
+ });
+ // read the control data at the callsite to the outlined function
+ if (codeInfo.hasReturn) {
+ reps.push(makeIf(
+ makeComparison(makeStackAccess(ASM_INT, asmData.controlStackPos), '==', ['num', CONTROL_RETURN_VOID]),
+ [['stat', ['return']]]
+ ));
+ reps.push(makeIf(
+ makeComparison(makeStackAccess(ASM_INT, asmData.controlStackPos), '==', ['num', CONTROL_RETURN_INT]),
+ [['stat', ['return', makeStackAccess(ASM_INT, asmData.controlDataStackPos)]]]
+ ));
+ reps.push(makeIf(
+ makeComparison(makeStackAccess(ASM_INT, asmData.controlStackPos), '==', ['num', CONTROL_RETURN_DOUBLE]),
+ [['stat', ['return', makeStackAccess(ASM_DOUBLE, asmData.controlDataStackPos)]]]
+ ));
+ }
+ if (codeInfo.hasBreak) {
+ reps.push(makeIf(
+ makeComparison(makeStackAccess(ASM_INT, asmData.controlStackPos), '==', ['num', CONTROL_BREAK]),
+ ['stat', ['break']]
+ ));
+ reps.push(makeIf(
+ makeComparison(makeStackAccess(ASM_INT, asmData.controlStackPos), '==', ['num', CONTROL_BREAK_LABEL]),
+ ['stat', ['break', makeStackAccess(ASM_INT, asmData.controlDataStackPos)]]
+ ));
+ }
+ if (codeInfo.hasContinue) {
+ reps.push(makeIf(
+ makeComparison(makeStackAccess(ASM_INT, asmData.controlStackPos), '==', ['num', CONTROL_CONTINUE]),
+ ['stat', ['break']]
+ ));
+ reps.push(makeIf(
+ makeComparison(makeStackAccess(ASM_INT, asmData.controlStackPos), '==', ['num', CONTROL_CONTINUE_LABEL]),
+ ['stat', ['continue', makeStackAccess(ASM_INT, asmData.controlDataStackPos)]]
+ ));
+ }
+ }
+ var newFunc = ['defun', newIdent, ['sp'], code];
+ var newAsmData = { params: { sp: ASM_INT }, vars: {} };
+ for (var v in codeInfo.reads) {
+ newAsmData.vars[v] = getAsmType(asmData, v);
+ }
+ for (var v in codeInfo.writes) {
+ newAsmData.vars[v] = getAsmType(asmData, v);
+ }
+ denormalizeAsm(newFunc, newAsmData);
+ // replace in stats
+ stats.splice.apply(stats, [start, end-start+1].concat(reps));
+ return [newFunc];
}
- function outlineStatements(func, asmData, stats) {
+ function outlineStatements(func, asmData, stats, maxSize) {
level++;
if (measureSize(stats) < sizeToOutline) return;
var ret = [];
@@ -2973,7 +3221,7 @@ function outline(ast) {
traverse(stat, function(node, type) {
if (type == 'block') {
if (measureSize(node) >= sizeToOutline) {
- var subRet = outlineStatements(func, asmData, node[1]);
+ var subRet = outlineStatements(func, asmData, node[1], maxSize);
if (subRet && subRet.length > 0) ret.push.apply(ret, subRet);
}
return null; // do not recurse into children, outlineStatements will do so if necessary
@@ -2983,17 +3231,19 @@ function outline(ast) {
continue;
}
sizeSeen += size;
- if (sizeSeen >= sizeToOutline) {
- if (i == 0 && end == stats.length-1) {
- // we have the full range here, so inlining would do nothing useful
- if (stats.length >= 2) {
- // at least split this function in half
- i = Math.floor(stats.length/2);
- end = stats.length-1;
- } else {
- break;
- }
+ // If this is big enough to outline, but no too big (if very close to the size of the full function,
+ // outlining is pointless; remove stats from the end to try to achieve the good case), then outline.
+ // Also, try to reduce the size if it is much larger than the hoped-for size
+ while ((sizeSeen > maxSize || sizeSeen > 2*sizeToOutline) && i < end) {
+ sizeSeen -= measureSize(stats[end]);
+ if (sizeSeen >= sizeToOutline) {
+ end--;
+ } else {
+ sizeSeen += measureSize(stats[end]); // abort, this took away too much
+ break;
}
+ }
+ if (sizeSeen >= sizeToOutline && sizeSeen <= maxSize) {
ret.push.apply(ret, doOutline(func, asmData, stats, i, end)); // outline [i, .. ,end] inclusive
sizeSeen = 0;
end = i-1;
@@ -3005,29 +3255,44 @@ function outline(ast) {
//
- var newFuncs = [];
+ if (ast[0] !== 'toplevel') {
+ assert(ast[0] == 'defun');
+ ast = ['toplevel', [ast]];
+ }
- traverseGeneratedFunctions(ast, function(func) {
- var asmData = normalizeAsm(func);
- var size = measureSize(func);
- if (size >= sizeToOutline) {
- aggressiveVariableElimination(func, asmData);
- var ret = outlineStatements(func, asmData, getStatements(func));
- if (ret && ret.length > 0) newFuncs.push.apply(newFuncs, ret);
- }
- denormalizeAsm(func, asmData);
- });
+ var funcs = ast[1];
+
+ var more = true;
+ while (more) {
+ more = false;
- if (newFuncs.length > 0) {
- // add new functions to the toplevel, or create a toplevel if there isn't one
- if (ast[0] === 'toplevel') {
- var stats = ast[1];
- stats.push.apply(stats, newFuncs);
- } else if (ast[0] === 'defun') {
- newFuncs.unshift(copy(ast));
- ast.length = 0;
- ast[0] = 'toplevel';
- ast[1] = newFuncs;
+ var newFuncs = [];
+
+ funcs.forEach(function(func) {
+ var asmData = normalizeAsm(func);
+ var size = measureSize(func);
+ if (size >= sizeToOutline) {
+ aggressiveVariableElimination(func, asmData);
+ analyzeFunction(func, asmData);
+ var ret = outlineStatements(func, asmData, getStatements(func), 0.5*size);
+ if (ret && ret.length > 0) newFuncs.push.apply(newFuncs, ret);
+ }
+ denormalizeAsm(func, asmData);
+ });
+
+ // TODO: control flow: route returns and breaks. outlined code should have all breaks/continues/returns break into the outermost scope,
+ // after setting a state variable, etc.
+
+ if (newFuncs.length > 0) {
+ // We have outlined. Add stack support: header in which we allocate enough stack space TODO
+ // If sp was not present before, add it and before each return, pop the stack. also a final pop if not ending with a return TODO
+ // (none of this should be done in inner functions, of course, just the original)
+
+ // add new functions to the toplevel, or create a toplevel if there isn't one
+ ast[1].push.apply(ast[1], newFuncs);
+
+ funcs = newFuncs;
+ more = true;
}
}
}
@@ -3057,12 +3322,13 @@ function fixDotZero(js) {
});
}
-function asmLoopOptimizer(ast) {
+function asmLastOpts(ast) {
traverseGeneratedFunctions(ast, function(fun) {
- // This is at the end of the pipeline, we can assume all other optimizations are done, and we modify loops
- // into shapes that might confuse other passes
traverse(fun, function(node, type) {
if (type === 'while' && node[1][0] === 'num' && node[1][1] === 1 && node[2][0] === 'block') {
+ // This is at the end of the pipeline, we can assume all other optimizations are done, and we modify loops
+ // into shapes that might confuse other passes
+
// while (1) { .. if (..) { break } } ==> do { .. } while(..)
var stats = node[2][1];
var last = stats[stats.length-1];
@@ -3090,6 +3356,11 @@ function asmLoopOptimizer(ast) {
node[1] = simplifyNotCompsDirect(['unary-prefix', '!', conditionToBreak]);
return node;
}
+ } else if (type == 'binary' && node[1] == '&' && node[3][0] == 'unary-prefix' && node[3][1] == '-' && node[3][2][0] == 'num' && node[3][2][1] == 1) {
+ // Change &-1 into |0, at this point the hint is no longer needed
+ node[1] = '|';
+ node[3] = node[3][2];
+ node[3][1] = 0;
}
});
});
@@ -3148,7 +3419,7 @@ arguments_.slice(1).forEach(function(arg) {
passes[arg](ast);
});
if (asm && last) {
- asmLoopOptimizer(ast); // TODO: move out of last, to make last faster when done later (as in side modules)
+ asmLastOpts(ast); // TODO: move out of last, to make last faster when done later (as in side modules)
prepDotZero(ast);
}
var js = astToSrc(ast, minifyWhitespace), old;
diff --git a/tools/test-js-optimizer-asm-last-output.js b/tools/test-js-optimizer-asm-last-output.js
index 0f95d544..f850b18f 100644
--- a/tools/test-js-optimizer-asm-last-output.js
+++ b/tools/test-js-optimizer-asm-last-output.js
@@ -30,6 +30,7 @@ function finall(x) {
a = -999999984306749400.0;
a = -999999984306749400.0;
a = -0xde0b6b000000000;
+ f(g() | 0);
return 12.0e10;
}
function looop() {
diff --git a/tools/test-js-optimizer-asm-last.js b/tools/test-js-optimizer-asm-last.js
index 05e1049e..1d39b1a6 100644
--- a/tools/test-js-optimizer-asm-last.js
+++ b/tools/test-js-optimizer-asm-last.js
@@ -30,6 +30,7 @@ function finall(x) {
a = +-0xde0b6b000000000;
a = -+0xde0b6b000000000;
a = -0xde0b6b000000000;
+ f(g() & -1);
return +12e10;
}
function looop() {
diff --git a/tools/test-js-optimizer-asm-outline-output.js b/tools/test-js-optimizer-asm-outline-output.js
index 2d48eb89..c54fc346 100644
--- a/tools/test-js-optimizer-asm-outline-output.js
+++ b/tools/test-js-optimizer-asm-outline-output.js
@@ -37,8 +37,10 @@ function linear() {
}
function _free($mem) {
$mem = $mem | 0;
- var $5 = 0, $10 = 0, $16 = 0, $21 = 0, $25 = 0, $26 = 0, $37 = 0, $40 = 0, $_pre_phi307 = 0, $69 = 0, $72 = 0, $75 = 0, $80 = 0, $95 = 0, $100 = 0, $RP_0 = 0, $R_0 = 0, $102 = 0, $103 = 0, $106 = 0, $107 = 0, $R_1 = 0, $120 = 0, $151 = 0, $164 = 0, $psize_0 = 0, $p_0 = 0, $189 = 0, $194 = 0, $204 = 0, $220 = 0, $227 = 0, $233 = 0, $236 = 0, $_pre_phi305 = 0, $267 = 0, $270 = 0, $273 = 0, $278 = 0, $294 = 0, $299 = 0, $RP9_0 = 0, $R7_0 = 0, $301 = 0, $302 = 0, $305 = 0, $306 = 0, $R7_1 = 0, $320 = 0, $351 = 0, $364 = 0, $psize_1 = 0, $390 = 0, $396 = 0, $404 = 0, $_pre_phi = 0, $F16_0 = 0, $414 = 0, $415 = 0, $428 = 0, $436 = 0, $I18_0 = 0, $443 = 0, $447 = 0, $448 = 0, $463 = 0, $T_0 = 0, $K19_0 = 0, $472 = 0, $473 = 0, $486 = 0, $487 = 0, $489 = 0, $501 = 0, $sp_0_in_i = 0, $sp_0_i = 0, label = 0;
+ var $5 = 0, $10 = 0, $16 = 0, $21 = 0, $25 = 0, $26 = 0, $37 = 0, $40 = 0, $_pre_phi307 = 0, $69 = 0, $72 = 0, $75 = 0, $80 = 0, $95 = 0, $100 = 0, $RP_0 = 0, $R_0 = 0, $102 = 0, $103 = 0, $106 = 0, $107 = 0, $R_1 = 0, $120 = 0, $151 = 0, $164 = 0, $psize_0 = 0, $p_0 = 0, $189 = 0, $194 = 0, $204 = 0, $220 = 0, $227 = 0, $233 = 0, $236 = 0, $_pre_phi305 = 0, $267 = 0, $270 = 0, $273 = 0, $278 = 0, $294 = 0, $299 = 0, $RP9_0 = 0, $R7_0 = 0, $301 = 0, $302 = 0, $305 = 0, $306 = 0, $R7_1 = 0, $320 = 0, $351 = 0, $364 = 0, $psize_1 = 0, $390 = 0, $396 = 0, $404 = 0, $_pre_phi = 0, $F16_0 = 0, $414 = 0, $415 = 0, $428 = 0, $436 = 0, $I18_0 = 0, $443 = 0, $447 = 0, $448 = 0, $463 = 0, $T_0 = 0, $K19_0 = 0, $472 = 0, $473 = 0, $486 = 0, $487 = 0, $489 = 0, $501 = 0, $sp_0_in_i = 0, $sp_0_i = 0, label = 0, sp = 0;
+ sp = STACKTOP;
if (($mem | 0) == 0) {
+ STACKTOP = sp;
return;
}
$5 = HEAP32[24] | 0;
@@ -562,6 +564,7 @@ function _free($mem) {
}
}
HEAP32[28] = -1;
+ STACKTOP = sp;
return;
}
diff --git a/tools/test-js-optimizer-asm-outline.js b/tools/test-js-optimizer-asm-outline.js
index ac9f6558..153d7feb 100644
--- a/tools/test-js-optimizer-asm-outline.js
+++ b/tools/test-js-optimizer-asm-outline.js
@@ -37,8 +37,10 @@ function linear() {
}
function _free($mem) {
$mem = $mem | 0;
- var $3 = 0, $4 = 0, $5 = 0, $10 = 0, $11 = 0, $14 = 0, $15 = 0, $16 = 0, $21 = 0, $_sum233 = 0, $24 = 0, $25 = 0, $26 = 0, $32 = 0, $37 = 0, $40 = 0, $43 = 0, $64 = 0, $_pre_phi307 = 0, $69 = 0, $72 = 0, $75 = 0, $80 = 0, $84 = 0, $88 = 0, $94 = 0, $95 = 0, $99 = 0, $100 = 0, $RP_0 = 0, $R_0 = 0, $102 = 0, $103 = 0, $106 = 0, $107 = 0, $R_1 = 0, $118 = 0, $120 = 0, $134 = 0, $151 = 0, $164 = 0, $177 = 0, $psize_0 = 0, $p_0 = 0, $189 = 0, $193 = 0, $194 = 0, $204 = 0, $220 = 0, $227 = 0, $228 = 0, $233 = 0, $236 = 0, $239 = 0, $262 = 0, $_pre_phi305 = 0, $267 = 0, $270 = 0, $273 = 0, $278 = 0, $283 = 0, $287 = 0, $293 = 0, $294 = 0, $298 = 0, $299 = 0, $RP9_0 = 0, $R7_0 = 0, $301 = 0, $302 = 0, $305 = 0, $306 = 0, $R7_1 = 0, $318 = 0, $320 = 0, $334 = 0, $351 = 0, $364 = 0, $psize_1 = 0, $390 = 0, $393 = 0, $395 = 0, $396 = 0, $397 = 0, $403 = 0, $404 = 0, $_pre_phi = 0, $F16_0 = 0, $414 = 0, $415 = 0, $422 = 0, $423 = 0, $426 = 0, $428 = 0, $431 = 0, $436 = 0, $I18_0 = 0, $443 = 0, $447 = 0, $448 = 0, $463 = 0, $T_0 = 0, $K19_0 = 0, $472 = 0, $473 = 0, $486 = 0, $487 = 0, $489 = 0, $501 = 0, $sp_0_in_i = 0, $sp_0_i = 0, label = 0;
+ var $3 = 0, $4 = 0, $5 = 0, $10 = 0, $11 = 0, $14 = 0, $15 = 0, $16 = 0, $21 = 0, $_sum233 = 0, $24 = 0, $25 = 0, $26 = 0, $32 = 0, $37 = 0, $40 = 0, $43 = 0, $64 = 0, $_pre_phi307 = 0, $69 = 0, $72 = 0, $75 = 0, $80 = 0, $84 = 0, $88 = 0, $94 = 0, $95 = 0, $99 = 0, $100 = 0, $RP_0 = 0, $R_0 = 0, $102 = 0, $103 = 0, $106 = 0, $107 = 0, $R_1 = 0, $118 = 0, $120 = 0, $134 = 0, $151 = 0, $164 = 0, $177 = 0, $psize_0 = 0, $p_0 = 0, $189 = 0, $193 = 0, $194 = 0, $204 = 0, $220 = 0, $227 = 0, $228 = 0, $233 = 0, $236 = 0, $239 = 0, $262 = 0, $_pre_phi305 = 0, $267 = 0, $270 = 0, $273 = 0, $278 = 0, $283 = 0, $287 = 0, $293 = 0, $294 = 0, $298 = 0, $299 = 0, $RP9_0 = 0, $R7_0 = 0, $301 = 0, $302 = 0, $305 = 0, $306 = 0, $R7_1 = 0, $318 = 0, $320 = 0, $334 = 0, $351 = 0, $364 = 0, $psize_1 = 0, $390 = 0, $393 = 0, $395 = 0, $396 = 0, $397 = 0, $403 = 0, $404 = 0, $_pre_phi = 0, $F16_0 = 0, $414 = 0, $415 = 0, $422 = 0, $423 = 0, $426 = 0, $428 = 0, $431 = 0, $436 = 0, $I18_0 = 0, $443 = 0, $447 = 0, $448 = 0, $463 = 0, $T_0 = 0, $K19_0 = 0, $472 = 0, $473 = 0, $486 = 0, $487 = 0, $489 = 0, $501 = 0, $sp_0_in_i = 0, $sp_0_i = 0, label = 0, sp = 0;
+ sp = STACKTOP;
if (($mem | 0) == 0) {
+ STACKTOP = sp;
return;
}
$3 = $mem - 8 | 0;
@@ -597,6 +599,7 @@ function _free($mem) {
}
}
HEAP32[28] = -1;
+ STACKTOP = sp;
return;
}
// EMSCRIPTEN_GENERATED_FUNCTIONS
diff --git a/tools/test-js-optimizer-asm-pre-output.js b/tools/test-js-optimizer-asm-pre-output.js
index 59a42010..b7afab26 100644
--- a/tools/test-js-optimizer-asm-pre-output.js
+++ b/tools/test-js-optimizer-asm-pre-output.js
@@ -63,6 +63,9 @@ function b($this, $__n) {
HEAP32[($this + 4 & 16777215) >> 2] = $40;
}
HEAP8[$38 + $40 & 16777215] = 0;
+ HEAP32[$4] = ~HEAP32[$5];
+ HEAP32[$4] = ~HEAP32[$5];
+ HEAP32[$4] = ~HEAP32[$5];
return;
}
function rett() {
@@ -127,6 +130,7 @@ function compare_result_simplification() {
HEAP32[$4] = HEAP32[$5] == HEAP32[$6];
HEAP32[$4] = HEAP32[$5] === HEAP32[$6];
HEAP32[$4] = HEAP32[$5] != HEAP32[$6];
+ HEAP32[$4] = HEAP32[$5] !== HEAP32[$6];
var x = HEAP32[$5] != HEAP32[$6] | 0;
}
function tempDoublePtr($45, $14, $28, $42) {
diff --git a/tools/test-js-optimizer-asm-pre.js b/tools/test-js-optimizer-asm-pre.js
index 7ca941fa..b762a60e 100644
--- a/tools/test-js-optimizer-asm-pre.js
+++ b/tools/test-js-optimizer-asm-pre.js
@@ -64,6 +64,12 @@ function b($this, $__n) {
HEAP32[(($this + 4 | 0) & 16777215) >> 2] = $40;
}
HEAP8[($38 + $40 | 0) & 16777215] = 0;
+ // Eliminate the |0.
+ HEAP32[$4] = ((~(HEAP32[$5]|0))|0);
+ // Rewrite to ~.
+ HEAP32[$4] = HEAP32[$5]^-1;
+ // Rewrite to ~ and eliminate the |0.
+ HEAP32[$4] = ((HEAP32[$5]|0)^-1)|0;
return;
}
function rett() {
@@ -131,6 +137,7 @@ function compare_result_simplification() {
HEAP32[$4] = (HEAP32[$5] == HEAP32[$6]) & 1;
HEAP32[$4] = (HEAP32[$5] === HEAP32[$6]) & 1;
HEAP32[$4] = (HEAP32[$5] != HEAP32[$6]) & 1;
+ HEAP32[$4] = (HEAP32[$5] !== HEAP32[$6]) & 1;
// Convert the &1 to |0 here, since we don't get an implicit coersion.
var x = (HEAP32[$5] != HEAP32[$6]) & 1;
}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-07-23 02:32:44 +0000