X86JITInfo::getLazyResolverFunction() should not read cpu id to determine whether sse is available. Just use consult subtarget.

No functionality changes.

llvm-svn: 80880

lib/Target/X86/X86JITInfo.cpp

@@ -15,6 +15,7 @@
 #include "X86JITInfo.h"
 #include "X86Relocations.h"
 #include "X86Subtarget.h"
+#include "X86TargetMachine.h"
 #include "llvm/Function.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/ErrorHandling.h"
@@ -407,24 +408,14 @@ TargetJITInfo::LazyResolverFn
 X86JITInfo::getLazyResolverFunction(JITCompilerFn F) {
   JITCompilerFunction = F;
 
-#if defined (X86_32_JIT) && !defined (_MSC_VER)
-  unsigned EAX = 0, EBX = 0, ECX = 0, EDX = 0;
-  union {
-    unsigned u[3];
-    char     c[12];
-  } text;
+  return Subtarget->hasSSE1()
+    ? X86CompilationCallback_SSE : X86CompilationCallback;
+}
 
-  if (!X86::GetCpuIDAndInfo(0, &EAX, text.u+0, text.u+2, text.u+1)) {
-    // FIXME: support for AMD family of processors.
-    if (memcmp(text.c, "GenuineIntel", 12) == 0) {
-      X86::GetCpuIDAndInfo(0x1, &EAX, &EBX, &ECX, &EDX);
-      if ((EDX >> 25) & 0x1)
-        return X86CompilationCallback_SSE;
-    }
-  }
-#endif
-
-  return X86CompilationCallback;
+X86JITInfo::X86JITInfo(X86TargetMachine &tm) : TM(tm) {
+  Subtarget = &TM.getSubtarget<X86Subtarget>();
+  useGOT = 0;
+  TLSOffset = 0;
 }
 
 void *X86JITInfo::emitGlobalValueIndirectSym(const GlobalValue* GV, void *ptr,

lib/Target/X86/X86JITInfo.h

@@ -20,16 +20,15 @@
 
 namespace llvm {
   class X86TargetMachine;
+  class X86Subtarget;
 
   class X86JITInfo : public TargetJITInfo {
     X86TargetMachine &TM;
+    const X86Subtarget *Subtarget;
     uintptr_t PICBase;
     char* TLSOffset;
   public:
-    explicit X86JITInfo(X86TargetMachine &tm) : TM(tm) {
-      useGOT = 0;
-      TLSOffset = 0;
-    }
+    explicit X86JITInfo(X86TargetMachine &tm);
 
     /// replaceMachineCodeForFunction - Make it so that calling the function
     /// whose machine code is at OLD turns into a call to NEW, perhaps by

lib/Target/X86/X86Subtarget.cpp

@@ -158,8 +158,9 @@ unsigned X86Subtarget::getSpecialAddressLatency() const {
 
 /// GetCpuIDAndInfo - Execute the specified cpuid and return the 4 values in the
 /// specified arguments.  If we can't run cpuid on the host, return true.
-bool X86::GetCpuIDAndInfo(unsigned value, unsigned *rEAX, unsigned *rEBX,
-                          unsigned *rECX, unsigned *rEDX) {
+bool
+X86Subtarget::GetCpuIDAndInfo(unsigned value, unsigned *rEAX,
+                              unsigned *rEBX, unsigned *rECX, unsigned *rEDX) {
 #if defined(__x86_64__) || defined(_M_AMD64) || defined (_M_X64)
   #if defined(__GNUC__)
     // gcc doesn't know cpuid would clobber ebx/rbx. Preseve it manually.
@@ -230,10 +231,10 @@ void X86Subtarget::AutoDetectSubtargetFeatures() {
     char     c[12];
   } text;
   
-  if (X86::GetCpuIDAndInfo(0, &EAX, text.u+0, text.u+2, text.u+1))
+  if (GetCpuIDAndInfo(0, &EAX, text.u+0, text.u+2, text.u+1))
     return;
 
-  X86::GetCpuIDAndInfo(0x1, &EAX, &EBX, &ECX, &EDX);
+  GetCpuIDAndInfo(0x1, &EAX, &EBX, &ECX, &EDX);
   
   if ((EDX >> 15) & 1) HasCMov = true;
   if ((EDX >> 23) & 1) X86SSELevel = MMX;
@@ -257,22 +258,22 @@ void X86Subtarget::AutoDetectSubtargetFeatures() {
     DetectFamilyModel(EAX, Family, Model);
     IsBTMemSlow = IsAMD || (Family == 6 && Model >= 13);
 
-    X86::GetCpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX);
+    GetCpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX);
     HasX86_64 = (EDX >> 29) & 0x1;
     HasSSE4A = IsAMD && ((ECX >> 6) & 0x1);
     HasFMA4 = IsAMD && ((ECX >> 16) & 0x1);
   }
 }
 
-static const char *GetCurrentX86CPU() {
+const char *X86Subtarget::GetCurrentX86CPU() {
   unsigned EAX = 0, EBX = 0, ECX = 0, EDX = 0;
-  if (X86::GetCpuIDAndInfo(0x1, &EAX, &EBX, &ECX, &EDX))
+  if (GetCpuIDAndInfo(0x1, &EAX, &EBX, &ECX, &EDX))
     return "generic";
   unsigned Family = 0;
   unsigned Model  = 0;
   DetectFamilyModel(EAX, Family, Model);
 
-  X86::GetCpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX);
+  GetCpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX);
   bool Em64T = (EDX >> 29) & 0x1;
   bool HasSSE3 = (ECX & 0x1);
 
@@ -281,7 +282,7 @@ static const char *GetCurrentX86CPU() {
     char     c[12];
   } text;
 
-  X86::GetCpuIDAndInfo(0, &EAX, text.u+0, text.u+2, text.u+1);
+  GetCpuIDAndInfo(0, &EAX, text.u+0, text.u+2, text.u+1);
   if (memcmp(text.c, "GenuineIntel", 12) == 0) {
     switch (Family) {
       case 3:

lib/Target/X86/X86Subtarget.h

@@ -214,14 +214,15 @@ public:
   /// indicating the number of scheduling cycles of backscheduling that
   /// should be attempted.
   unsigned getSpecialAddressLatency() const;
-};
 
-namespace X86 {
+private:
   /// GetCpuIDAndInfo - Execute the specified cpuid and return the 4 values in
   /// the specified arguments.  If we can't run cpuid on the host, return true.
   bool GetCpuIDAndInfo(unsigned value, unsigned *rEAX, unsigned *rEBX,
                        unsigned *rECX, unsigned *rEDX);
-}
+
+  const char *GetCurrentX86CPU();
+};
 
 } // End llvm namespace