[Mesa-dev] [PATCH 1/9] gallivm: Use LLVMPrintValueToString where available.

[Jose Fonseca]

And llvm::raw_string_ostream where not (LLVM 3.3).

Thereby eliminating yet another dependency on unstable LLVM interfaces.

As a bonus this also gets LLVM IR on OutputDebugMessageA on MSVC (which
was disabled, probably due to C++ issues.)

Tested `lp_test_arit -v -v` on LLVM 3.3, 3.4 and 3.8.
---
 src/gallium/auxiliary/gallivm/lp_bld_debug.cpp | 45 ++++++--------------------
 1 file changed, 10 insertions(+), 35 deletions(-)

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_debug.cpp b/src/gallium/auxiliary/gallivm/lp_bld_debug.cpp
index 11e9f92..a8c3899 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_debug.cpp
+++ b/src/gallium/auxiliary/gallivm/lp_bld_debug.cpp
@@ -64,38 +64,6 @@ lp_check_alignment(const void *ptr, unsigned alignment)
    return ((uintptr_t)ptr & (alignment - 1)) == 0;
 }
 
-#if (defined(PIPE_OS_WINDOWS) && !defined(PIPE_CC_MSVC)) || defined(PIPE_OS_EMBEDDED)
-
-class raw_debug_ostream :
-   public llvm::raw_ostream
-{
-private:
-   uint64_t pos;
-
-public:
-   raw_debug_ostream() : pos(0) { }
-
-   void write_impl(const char *Ptr, size_t Size);
-
-   uint64_t current_pos() const { return pos; }
-   size_t preferred_buffer_size() const { return 512; }
-};
-
-
-void
-raw_debug_ostream::write_impl(const char *Ptr, size_t Size)
-{
-   if (Size > 0) {
-      char *lastPtr = (char *)&Ptr[Size];
-      char last = *lastPtr;
-      *lastPtr = 0;
-      _debug_printf("%*s", Size, Ptr);
-      *lastPtr = last;
-      pos += Size;
-   }
-}
-
-#endif
 
 extern "C" const char *
 lp_get_module_id(LLVMModuleRef module)
@@ -110,10 +78,17 @@ lp_get_module_id(LLVMModuleRef module)
 extern "C" void
 lp_debug_dump_value(LLVMValueRef value)
 {
-#if (defined(PIPE_OS_WINDOWS) && !defined(PIPE_CC_MSVC)) || defined(PIPE_OS_EMBEDDED)
-   raw_debug_ostream os;
+#if HAVE_LLVM >= 0x0304
+   char *str = LLVMPrintValueToString(value);
+   if (str) {
+      os_log_message(str);
+      LLVMDisposeMessage(str);
+   }
+#elif defined(PIPE_OS_WINDOWS) || defined(PIPE_OS_EMBEDDED)
+   std::string str;
+   llvm::raw_string_ostream os(str);
    llvm::unwrap(value)->print(os);
-   os.flush();
+   os_log_message(str.c_str());
 #else
    LLVMDumpValue(value);
 #endif
-- 
2.5.0