[llvm-commits] [llvm-gcc-4.2] r48471 - in /llvm-gcc-4.2/trunk/gcc/config/rs6000: llvm-rs6000.cpp rs6000.h

[Dale Johannesen]

Author: johannes
Date: Mon Mar 17 17:22:06 2008
New Revision: 48471

URL: http://llvm.org/viewvc/llvm-project?rev=48471&view=rev
Log:
ppc32 structs containing a single generic vector are
passed using the sret mechanism.


Modified:
    llvm-gcc-4.2/trunk/gcc/config/rs6000/llvm-rs6000.cpp
    llvm-gcc-4.2/trunk/gcc/config/rs6000/rs6000.h

Modified: llvm-gcc-4.2/trunk/gcc/config/rs6000/llvm-rs6000.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm-gcc-4.2/trunk/gcc/config/rs6000/llvm-rs6000.cpp?rev=48471&r1=48470&r2=48471&view=diff

==============================================================================
--- llvm-gcc-4.2/trunk/gcc/config/rs6000/llvm-rs6000.cpp (original)
+++ llvm-gcc-4.2/trunk/gcc/config/rs6000/llvm-rs6000.cpp Mon Mar 17 17:22:06 2008
@@ -405,7 +405,8 @@
   // Note this does not apply to long double.
   // This is required for ABI correctness.  
   tree tType = isSingleElementStructOrArray(TreeType, true, false);
-  if (tType && int_size_in_bytes(tType)==Bytes && TYPE_MODE(tType)!=TFmode)
+  if (tType && int_size_in_bytes(tType)==Bytes && TYPE_MODE(tType)!=TFmode &&
+      (TREE_CODE(tType)!=VECTOR_TYPE || Bytes==16))
     return false;
 
   return true;
@@ -430,14 +431,15 @@
   const StructType *STy = dyn_cast<StructType>(Ty);
   if (!STy || STy->isPacked()) return false;
 
-  // A struct containing only a float, double or vector field, possibly with
+  // A struct containing only a float, double or Altivec field, possibly with
   // some zero-length fields as well, must be passed as the field type.
-  // Note this does not apply to long double.
+  // Note this does not apply to long double, nor generic vectors.
   // Other single-element structs may be passed this way as well, but
   // only if the type size matches the element's type size (structs that
   // violate this can be created with __aligned__).
   tree tType = isSingleElementStructOrArray(TreeType, true, false);
-  if (tType && int_size_in_bytes(tType)==SrcSize && TYPE_MODE(tType)!=TFmode) {
+  if (tType && int_size_in_bytes(tType)==SrcSize && TYPE_MODE(tType)!=TFmode &&
+      (TREE_CODE(tType)!=VECTOR_TYPE || SrcSize==16)) {
     Elts.push_back(ConvertType(tType));
     return true;
   }

Modified: llvm-gcc-4.2/trunk/gcc/config/rs6000/rs6000.h
URL: http://llvm.org/viewvc/llvm-project/llvm-gcc-4.2/trunk/gcc/config/rs6000/rs6000.h?rev=48471&r1=48470&r2=48471&view=diff

==============================================================================
--- llvm-gcc-4.2/trunk/gcc/config/rs6000/rs6000.h (original)
+++ llvm-gcc-4.2/trunk/gcc/config/rs6000/rs6000.h Mon Mar 17 17:22:06 2008
@@ -3486,6 +3486,16 @@
 #define LLVM_SHOULD_PASS_AGGREGATE_IN_MIXED_REGS(T, TY, E) \
    llvm_rs6000_should_pass_aggregate_in_mixed_regs((T), (TY), (E))
 
+// Non-altivec vectors bigger than 4 bytes are returned by sret.
+#define LLVM_SHOULD_RETURN_VECTOR_AS_SHADOW(X,isBuiltin)\
+  ((!TARGET_64BIT &&                                    \
+    TREE_CODE(X) == VECTOR_TYPE &&                      \
+    TYPE_SIZE(X) &&                                     \
+    TREE_CODE(TYPE_SIZE(X))==INTEGER_CST &&             \
+    TREE_INT_CST_LOW(TYPE_SIZE(X))>32 &&                \
+    TREE_INT_CST_LOW(TYPE_SIZE(X))!=128)                \
+    ? true : false)    
+
 #endif /* LLVM_ABI_H */
 
 /* LLVM LOCAL end */