spec cleanup

1 files changed, 0 insertions, 74 deletions

diff --git a/bug1375074-save-restore-x28.patch b/bug1375074-save-restore-x28.patch
deleted file mode 100644
index 57a83a2..0000000
--- a/bug1375074-save-restore-x28.patch
+++ /dev/null
@@ -1,74 +0,0 @@
-# HG changeset patch
-# User Lars T Hansen <lhansen@mozilla.com>
-# Date 1519822672 -3600
-#      Wed Feb 28 13:57:52 2018 +0100
-# Node ID 672f0415217b202ae59a930769dffd9d6ba6b87c
-# Parent  825fd04dacc6297d3a980ec4184079405950b35d
-Bug 1375074 - Save and restore non-volatile x28 on ARM64 for generated unboxed object constructor.
-
-diff --git a/js/src/jit-test/tests/bug1375074.js b/js/src/jit-test/tests/bug1375074.js
-new file mode 100644
---- /dev/null
-+++ b/js/src/jit-test/tests/bug1375074.js
-@@ -0,0 +1,18 @@
-+// This forces the VM to start creating unboxed objects and thus stresses a
-+// particular path into generated code for a specialized unboxed object
-+// constructor.
-+
-+var K = 2000;			// 2000 should be plenty
-+var s = "[";
-+var i;
-+for ( i=0; i < K-1; i++ )
-+    s = s + `{"i":${i}},`;
-+s += `{"i":${i}}]`;
-+var v = JSON.parse(s);
-+
-+assertEq(v.length == K, true);
-+
-+for ( i=0; i < K; i++) {
-+    assertEq(v[i] instanceof Object, true);
-+    assertEq(v[i].i, i);
-+}
-diff --git a/js/src/vm/UnboxedObject.cpp b/js/src/vm/UnboxedObject.cpp
---- a/js/src/vm/UnboxedObject.cpp
-+++ b/js/src/vm/UnboxedObject.cpp
-@@ -95,7 +95,15 @@ UnboxedLayout::makeConstructorCode(JSCon
- #endif
- 
- #ifdef JS_CODEGEN_ARM64
--    // ARM64 communicates stack address via sp, but uses a pseudo-sp for addressing.
-+    // ARM64 communicates stack address via sp, but uses a pseudo-sp (PSP) for
-+    // addressing.  The register we use for PSP may however also be used by
-+    // calling code, and it is nonvolatile, so save it.  Do this as a special
-+    // case first because the generic save/restore code needs the PSP to be
-+    // initialized already.
-+    MOZ_ASSERT(PseudoStackPointer64.Is(masm.GetStackPointer64()));
-+    masm.Str(PseudoStackPointer64, vixl::MemOperand(sp, -16, vixl::PreIndex));
-+
-+    // Initialize the PSP from the SP.
-     masm.initStackPtr();
- #endif
- 
-@@ -233,7 +241,22 @@ UnboxedLayout::makeConstructorCode(JSCon
-         masm.pop(ScratchDoubleReg);
-     masm.PopRegsInMask(savedNonVolatileRegisters);
- 
-+#ifdef JS_CODEGEN_ARM64
-+    // Now restore the value that was in the PSP register on entry, and return.
-+
-+    // Obtain the correct SP from the PSP.
-+    masm.Mov(sp, PseudoStackPointer64);
-+
-+    // Restore the saved value of the PSP register, this value is whatever the
-+    // caller had saved in it, not any actual SP value, and it must not be
-+    // overwritten subsequently.
-+    masm.Ldr(PseudoStackPointer64, vixl::MemOperand(sp, 16, vixl::PostIndex));
-+
-+    // Perform a plain Ret(), as abiret() will move SP <- PSP and that is wrong.
-+    masm.Ret(vixl::lr);
-+#else
-     masm.abiret();
-+#endif
- 
-     masm.bind(&failureStoreOther);
-