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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/188072">188072</a></dd>
<dt>Author</dt> <dd>msaboff@apple.com</dd>
<dt>Date</dt> <dd>2015-08-06 15:45:20 -0700 (Thu, 06 Aug 2015)</dd>
</dl>
<h3>Log Message</h3>
<pre>jsc-tailcall: Stop saving and restoring all callee saves on vmEntry / exit for platforms with per function callee saves handling
https://bugs.webkit.org/show_bug.cgi?id=147747
Reviewed by Basile Clement.
Removed saving of callee save registers and materialization of special tag registers for
64 bit platforms.
* llint/LowLevelInterpreter.asm:
* llint/LowLevelInterpreter64.asm:</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#branchesjsctailcallSourceJavaScriptCoreChangeLog">branches/jsc-tailcall/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#branchesjsctailcallSourceJavaScriptCorellintLowLevelInterpreterasm">branches/jsc-tailcall/Source/JavaScriptCore/llint/LowLevelInterpreter.asm</a></li>
<li><a href="#branchesjsctailcallSourceJavaScriptCorellintLowLevelInterpreter64asm">branches/jsc-tailcall/Source/JavaScriptCore/llint/LowLevelInterpreter64.asm</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="branchesjsctailcallSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: branches/jsc-tailcall/Source/JavaScriptCore/ChangeLog (188071 => 188072)</h4>
<pre class="diff"><span>
<span class="info">--- branches/jsc-tailcall/Source/JavaScriptCore/ChangeLog 2015-08-06 22:41:51 UTC (rev 188071)
+++ branches/jsc-tailcall/Source/JavaScriptCore/ChangeLog 2015-08-06 22:45:20 UTC (rev 188072)
</span><span class="lines">@@ -1,5 +1,18 @@
</span><span class="cx"> 2015-08-06 Michael Saboff <msaboff@apple.com>
</span><span class="cx">
</span><ins>+ jsc-tailcall: Stop saving and restoring all callee saves on vmEntry / exit for platforms with per function callee saves handling
+ https://bugs.webkit.org/show_bug.cgi?id=147747
+
+ Reviewed by Basile Clement.
+
+ Removed saving of callee save registers and materialization of special tag registers for
+ 64 bit platforms.
+
+ * llint/LowLevelInterpreter.asm:
+ * llint/LowLevelInterpreter64.asm:
+
+2015-08-06 Michael Saboff <msaboff@apple.com>
+
</ins><span class="cx"> jsc-tailcall: Exceptions should properly restore callee save register contents during unwinding
</span><span class="cx"> https://bugs.webkit.org/show_bug.cgi?id=147639
</span><span class="cx">
</span></span></pre></div>
<a id="branchesjsctailcallSourceJavaScriptCorellintLowLevelInterpreterasm"></a>
<div class="modfile"><h4>Modified: branches/jsc-tailcall/Source/JavaScriptCore/llint/LowLevelInterpreter.asm (188071 => 188072)</h4>
<pre class="diff"><span>
<span class="info">--- branches/jsc-tailcall/Source/JavaScriptCore/llint/LowLevelInterpreter.asm 2015-08-06 22:41:51 UTC (rev 188071)
+++ branches/jsc-tailcall/Source/JavaScriptCore/llint/LowLevelInterpreter.asm 2015-08-06 22:45:20 UTC (rev 188072)
</span><span class="lines">@@ -397,18 +397,15 @@
</span><span class="cx"> end
</span><span class="cx"> end
</span><span class="cx">
</span><del>-if C_LOOP
</del><ins>+# ARM64 and the X86 64 bit platforms properly save and restore callee saves in each function.
+if C_LOOP or ARM64 or X86_64 or X86_64_WIN
</ins><span class="cx"> const CalleeSaveRegisterCount = 0
</span><span class="cx"> elsif ARM or ARMv7_TRADITIONAL or ARMv7
</span><span class="cx"> const CalleeSaveRegisterCount = 7
</span><del>-elsif ARM64
- const CalleeSaveRegisterCount = 10
-elsif SH4 or X86_64 or MIPS
</del><ins>+elsif SH4 or MIPS
</ins><span class="cx"> const CalleeSaveRegisterCount = 5
</span><span class="cx"> elsif X86 or X86_WIN
</span><span class="cx"> const CalleeSaveRegisterCount = 3
</span><del>-elsif X86_64_WIN
- const CalleeSaveRegisterCount = 7
</del><span class="cx"> end
</span><span class="cx">
</span><span class="cx"> const CalleeRegisterSaveSize = CalleeSaveRegisterCount * PtrSize
</span><span class="lines">@@ -418,17 +415,11 @@
</span><span class="cx"> const VMEntryTotalFrameSize = (CalleeRegisterSaveSize + sizeof VMEntryRecord + StackAlignment - 1) & ~StackAlignmentMask
</span><span class="cx">
</span><span class="cx"> macro pushCalleeSaves()
</span><del>- if C_LOOP
</del><ins>+ if C_LOOP or ARM64 or X86_64 or X86_64_WIN
</ins><span class="cx"> elsif ARM or ARMv7_TRADITIONAL
</span><span class="cx"> emit "push {r4-r10}"
</span><span class="cx"> elsif ARMv7
</span><span class="cx"> emit "push {r4-r6, r8-r11}"
</span><del>- elsif ARM64
- emit "stp x20, x19, [sp, #-16]!"
- emit "stp x22, x21, [sp, #-16]!"
- emit "stp x24, x23, [sp, #-16]!"
- emit "stp x26, x25, [sp, #-16]!"
- emit "stp x28, x27, [sp, #-16]!"
</del><span class="cx"> elsif MIPS
</span><span class="cx"> emit "addiu $sp, $sp, -20"
</span><span class="cx"> emit "sw $20, 16($sp)"
</span><span class="lines">@@ -450,35 +441,15 @@
</span><span class="cx"> emit "push esi"
</span><span class="cx"> emit "push edi"
</span><span class="cx"> emit "push ebx"
</span><del>- elsif X86_64
- emit "push %r12"
- emit "push %r13"
- emit "push %r14"
- emit "push %r15"
- emit "push %rbx"
- elsif X86_64_WIN
- emit "push r12"
- emit "push r13"
- emit "push r14"
- emit "push r15"
- emit "push rbx"
- emit "push rdi"
- emit "push rsi"
</del><span class="cx"> end
</span><span class="cx"> end
</span><span class="cx">
</span><span class="cx"> macro popCalleeSaves()
</span><del>- if C_LOOP
</del><ins>+ if C_LOOP or ARM64 or X86_64 or X86_64_WIN
</ins><span class="cx"> elsif ARM or ARMv7_TRADITIONAL
</span><span class="cx"> emit "pop {r4-r10}"
</span><span class="cx"> elsif ARMv7
</span><span class="cx"> emit "pop {r4-r6, r8-r11}"
</span><del>- elsif ARM64
- emit "ldp x28, x27, [sp], #16"
- emit "ldp x26, x25, [sp], #16"
- emit "ldp x24, x23, [sp], #16"
- emit "ldp x22, x21, [sp], #16"
- emit "ldp x20, x19, [sp], #16"
</del><span class="cx"> elsif MIPS
</span><span class="cx"> emit "lw $16, 0($sp)"
</span><span class="cx"> emit "lw $17, 4($sp)"
</span><span class="lines">@@ -500,20 +471,6 @@
</span><span class="cx"> emit "pop ebx"
</span><span class="cx"> emit "pop edi"
</span><span class="cx"> emit "pop esi"
</span><del>- elsif X86_64
- emit "pop %rbx"
- emit "pop %r15"
- emit "pop %r14"
- emit "pop %r13"
- emit "pop %r12"
- elsif X86_64_WIN
- emit "pop rsi"
- emit "pop rdi"
- emit "pop rbx"
- emit "pop r15"
- emit "pop r14"
- emit "pop r13"
- emit "pop r12"
</del><span class="cx"> end
</span><span class="cx"> end
</span><span class="cx">
</span><span class="lines">@@ -559,10 +516,9 @@
</span><span class="cx"> storep csr3, -16[cfr]
</span><span class="cx"> storep csr0, -24[cfr]
</span><span class="cx"> elsif X86_64_WIN
</span><del>- storep t4, -8[cfr]
- storep csr6, -16[cfr]
- storep csr5, -24[cfr]
- storep csr0, -32[cfr]
</del><ins>+ storep csr6, -8[cfr]
+ storep csr5, -16[cfr]
+ storep csr0, -24[cfr]
</ins><span class="cx"> end
</span><span class="cx"> end
</span><span class="cx">
</span></span></pre></div>
<a id="branchesjsctailcallSourceJavaScriptCorellintLowLevelInterpreter64asm"></a>
<div class="modfile"><h4>Modified: branches/jsc-tailcall/Source/JavaScriptCore/llint/LowLevelInterpreter64.asm (188071 => 188072)</h4>
<pre class="diff"><span>
<span class="info">--- branches/jsc-tailcall/Source/JavaScriptCore/llint/LowLevelInterpreter64.asm 2015-08-06 22:41:51 UTC (rev 188071)
+++ branches/jsc-tailcall/Source/JavaScriptCore/llint/LowLevelInterpreter64.asm 2015-08-06 22:45:20 UTC (rev 188072)
</span><span class="lines">@@ -215,9 +215,6 @@
</span><span class="cx"> end
</span><span class="cx"> storep cfr, VM::topVMEntryFrame[vm]
</span><span class="cx">
</span><del>- move TagTypeNumber, tagTypeNumber
- addp TagBitTypeOther, tagTypeNumber, tagMask
-
</del><span class="cx"> checkStackPointerAlignment(extraTempReg, 0xbad0dc02)
</span><span class="cx">
</span><span class="cx"> makeCall(entry, t3)
</span></span></pre>
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