Fix build on ARM in ARM mode (instead of thumb2)

We don't support the traditional ARM assembler (yet), only JIT on thumb2.  In
order for us to reliably check that, we have to wait until the pre-processor
runs, which this patch achieves by moving all JIT enable/disable decisions into
qv4global_p.h

Change-Id: I7eff5b4fbf1cd26297a08dee16984ad867358113
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

7 files changed, 54 insertions, 34 deletions

diff --git a/src/3rdparty/masm/masm-defs.pri b/src/3rdparty/masm/masm-defs.pri
index aa6acc9094..cc97440257 100644
--- a/src/3rdparty/masm/masm-defs.pri
+++ b/src/3rdparty/masm/masm-defs.pri
@@ -1,19 +1,5 @@
 
 
-wince*: CONFIG += disable_jit
-ios: CONFIG += disable_jit
-if(win*:isEqual(QT_ARCH, "x86_64")): CONFIG += disable_jit
-equals(ANDROID_TARGET_ARCH, armeabi): CONFIG += disable_jit
-
-disable_jit: DEFINES += ENABLE_YARR_JIT=0
-else: DEFINES += V4_ENABLE_JIT ENABLE_YARR_JIT=1
-
-# On Qt/Android/ARM release builds are thumb and debug builds arm,
-# but we'll force the JIT to always generate thumb2
-contains(DEFINES, V4_ENABLE_JIT):android:isEqual(QT_ARCH, "arm") {
-    DEFINES += WTF_CPU_ARM_THUMB2
-}
-
 DEFINES += WTF_EXPORT_PRIVATE="" JS_EXPORT_PRIVATE=""
 
 win*: DEFINES += NOMINMAX
@@ -22,11 +8,8 @@ DEFINES += ENABLE_LLINT=0
 DEFINES += ENABLE_DFG_JIT=0
 DEFINES += ENABLE_DFG_JIT_UTILITY_METHODS=1
 DEFINES += ENABLE_JIT_CONSTANT_BLINDING=0
-DEFINES += ENABLE_ASSEMBLER=1
 DEFINES += BUILDING_QT__
 
-DEFINES += ENABLE_JIT=1
-
 INCLUDEPATH += $$PWD/jit
 INCLUDEPATH += $$PWD/assembler
 INCLUDEPATH += $$PWD/runtime
diff --git a/src/3rdparty/masm/masm.pri b/src/3rdparty/masm/masm.pri
index 63537f26d5..d7b315602e 100644
--- a/src/3rdparty/masm/masm.pri
+++ b/src/3rdparty/masm/masm.pri
@@ -1,11 +1,6 @@
-contains(DEFINES, V4_ENABLE_JIT) {
-    HEADERS += $$PWD/assembler/*.h
-    SOURCES += $$PWD/assembler/ARMAssembler.cpp
-    SOURCES += $$PWD/assembler/ARMv7Assembler.cpp
-    SOURCES += $$PWD/assembler/MacroAssemblerARM.cpp
-    SOURCES += $$PWD/assembler/MacroAssemblerSH4.cpp
-    SOURCES += $$PWD/assembler/LinkBuffer.cpp
-}
+HEADERS += $$PWD/assembler/*.h
+SOURCES += $$PWD/assembler/ARMv7Assembler.cpp
+SOURCES += $$PWD/assembler/LinkBuffer.cpp
 
 HEADERS += $$PWD/wtf/*.h
 SOURCES += $$PWD/wtf/PrintStream.cpp
diff --git a/src/3rdparty/masm/wtf/Platform.h b/src/3rdparty/masm/wtf/Platform.h
index b8402a991f..c81a9fe40f 100644
--- a/src/3rdparty/masm/wtf/Platform.h
+++ b/src/3rdparty/masm/wtf/Platform.h
@@ -28,6 +28,10 @@
 #ifndef WTF_Platform_h
 #define WTF_Platform_h
 
+#if defined(__cplusplus)
+#include <private/qv4global_p.h>
+#endif
+
 /* Include compiler specific macros */
 #include <wtf/Compiler.h>
 
@@ -767,7 +771,8 @@
 #endif
 
 /* If the jit is not available, enable the LLInt C Loop: */
-#if !ENABLE(JIT)
+/* Not for Qml. We have our own interpreter. */
+#if 0 /* !ENABLE(JIT) */
 #undef ENABLE_LLINT        /* Undef so that we can redefine it. */
 #undef ENABLE_LLINT_C_LOOP /* Undef so that we can redefine it. */
 #undef ENABLE_DFG_JIT      /* Undef so that we can redefine it. */
@@ -778,7 +783,7 @@
 
 /* Do a sanity check to make sure that we at least have one execution engine in
    use: */
-#if !(ENABLE(JIT) || ENABLE(LLINT))
+#if 0 /* !(ENABLE(JIT) || ENABLE(LLINT)) */
 #error You have to have at least one execution model enabled to build JSC
 #endif
 
diff --git a/src/qml/compiler/compiler.pri b/src/qml/compiler/compiler.pri
index 3a1af30b88..df4f5e8dc3 100644
--- a/src/qml/compiler/compiler.pri
+++ b/src/qml/compiler/compiler.pri
@@ -14,7 +14,8 @@ HEADERS += \
     $$PWD/qv4isel_util_p.h \
     $$PWD/qv4ssa_p.h \
     $$PWD/qv4regalloc_p.h \
-    $$PWD/qqmlcodegenerator_p.h
+    $$PWD/qqmlcodegenerator_p.h \
+    $$PWD/qv4isel_masm_p.h
 
 SOURCES += \
     $$PWD/qv4compileddata.cpp \
@@ -26,11 +27,7 @@ SOURCES += \
     $$PWD/qv4jsir.cpp \
     $$PWD/qv4ssa.cpp \
     $$PWD/qv4regalloc.cpp \
-    $$PWD/qqmlcodegenerator.cpp
-
-contains(DEFINES, V4_ENABLE_JIT) {
-    HEADERS += $$PWD/qv4isel_masm_p.h
-    SOURCES += $$PWD/qv4isel_masm.cpp
-}
+    $$PWD/qqmlcodegenerator.cpp \
+    $$PWD/qv4isel_masm.cpp
 
 include(../../3rdparty/masm/masm.pri)
diff --git a/src/qml/compiler/qv4isel_masm.cpp b/src/qml/compiler/qv4isel_masm.cpp
index 1155322df2..888d11a6c5 100644
--- a/src/qml/compiler/qv4isel_masm.cpp
+++ b/src/qml/compiler/qv4isel_masm.cpp
@@ -56,6 +56,8 @@
 #include <iostream>
 #include <cassert>
 
+#if ENABLE(ASSEMBLER)
+
 #if USE(UDIS86)
 #  include <udis86.h>
 #endif
@@ -2566,3 +2568,5 @@ bool InstructionSelection::int32Binop(V4IR::AluOp oper, V4IR::Expr *leftSource,
         return false;
     }
 }
+
+#endif // ENABLE(ASSEMBLER)
diff --git a/src/qml/compiler/qv4isel_masm_p.h b/src/qml/compiler/qv4isel_masm_p.h
index 02ddd158a9..bd4c564ab9 100644
--- a/src/qml/compiler/qv4isel_masm_p.h
+++ b/src/qml/compiler/qv4isel_masm_p.h
@@ -51,6 +51,9 @@
 #include <QtCore/QHash>
 #include <config.h>
 #include <wtf/Vector.h>
+
+#if ENABLE(ASSEMBLER)
+
 #include <assembler/MacroAssembler.h>
 #include <assembler/MacroAssemblerCodeRef.h>
 
@@ -1606,4 +1609,6 @@ public:
 
 QT_END_NAMESPACE
 
+#endif // ENABLE(ASSEMBLER)
+
 #endif // QV4ISEL_MASM_P_H
diff --git a/src/qml/jsruntime/qv4global_p.h b/src/qml/jsruntime/qv4global_p.h
index 3569247459..2050ccd746 100644
--- a/src/qml/jsruntime/qv4global_p.h
+++ b/src/qml/jsruntime/qv4global_p.h
@@ -64,6 +64,37 @@ inline double trunc(double d) { return d > 0 ? floor(d) : ceil(d); }
 
 #define qOffsetOf(s, m) ((size_t)((((char *)&(((s *)64)->m)) - 64)))
 
+// Decide whether to enable or disable the JIT
+
+// White list architectures
+
+#if defined(Q_PROCESSOR_X86)
+#define V4_ENABLE_JIT
+#elif defined(Q_PROCESSOR_X86_64)
+#define V4_ENABLE_JIT
+#elif defined(Q_PROCESSOR_ARM_32) && __TARGET_ARCH_THUMB-0 == 4
+#define V4_ENABLE_JIT
+#endif
+
+// Black list some platforms
+#if defined(V4_ENABLE_JIT)
+#if defined(Q_OS_WINCE) || defined(Q_OS_IOS) || defined(Q_OS_WIN64)
+    #undef V4_ENABLE_JIT
+#endif
+#endif
+
+// Do certain things depending on whether the JIT is enabled or disabled
+
+#ifdef V4_ENABLE_JIT
+#define ENABLE_YARR_JIT 1
+#define ENABLE_JIT 1
+#define ENABLE_ASSEMBLER 1
+#else
+#define ENABLE_YARR_JIT 0
+#define ENABLE_ASSEMBLER 0
+#define ENABLE_JIT 0
+#endif
+
 #if defined(Q_OS_QNX)
 #include <math.h>
 #undef isnan