Revision: 19668
Author: [email protected]
Date: Wed Mar 5 09:49:07 2014 UTC
Log: x64: Fix LMathMinMax for constant Smi right-hand operands
BUG=chromium:349079
LOG=y
[email protected]
Review URL: https://codereview.chromium.org/186593003
http://code.google.com/p/v8/source/detail?r=19668
Added:
/branches/bleeding_edge/test/mjsunit/regress/regress-crbug-349079.js
Modified:
/branches/bleeding_edge/src/x64/lithium-x64.cc
=======================================
--- /dev/null
+++ /branches/bleeding_edge/test/mjsunit/regress/regress-crbug-349079.js
Wed Mar 5 09:49:07 2014 UTC
@@ -0,0 +1,23 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax
+
+function assertEquals(expected, found) {
+ return found === expected;
+};
+%NeverOptimizeFunction(assertEquals);
+
+function crash() {
+ var a = 1;
+ var b = -0;
+ var c = 1.5;
+ assertEquals(b, Math.max(b++, c++));
+ assertEquals(c, Math.min(b++, c++));
+ assertEquals(b, Math.max(b++, a++));
+}
+crash();
+crash();
+%OptimizeFunctionOnNextCall(crash);
+crash();
=======================================
--- /branches/bleeding_edge/src/x64/lithium-x64.cc Tue Mar 4 12:48:17 2014
UTC
+++ /branches/bleeding_edge/src/x64/lithium-x64.cc Wed Mar 5 09:49:07 2014
UTC
@@ -1435,15 +1435,16 @@
LInstruction* LChunkBuilder::DoMathMinMax(HMathMinMax* instr) {
LOperand* left = NULL;
LOperand* right = NULL;
- if (instr->representation().IsSmiOrInteger32()) {
-
ASSERT(instr->left()->representation().Equals(instr->representation()));
-
ASSERT(instr->right()->representation().Equals(instr->representation()));
+ ASSERT(instr->left()->representation().Equals(instr->representation()));
+ ASSERT(instr->right()->representation().Equals(instr->representation()));
+ if (instr->representation().IsSmi()) {
+ left = UseRegisterAtStart(instr->BetterLeftOperand());
+ right = UseAtStart(instr->BetterRightOperand());
+ } else if (instr->representation().IsInteger32()) {
left = UseRegisterAtStart(instr->BetterLeftOperand());
right = UseOrConstantAtStart(instr->BetterRightOperand());
} else {
ASSERT(instr->representation().IsDouble());
- ASSERT(instr->left()->representation().IsDouble());
- ASSERT(instr->right()->representation().IsDouble());
left = UseRegisterAtStart(instr->left());
right = UseRegisterAtStart(instr->right());
}
--
--
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