From 775edbfaa1ab0077fd60e1e5283081279763d0d8 Mon Sep 17 00:00:00 2001
From: José Fonseca <jfonseca@vmware.com>
Date: Fri, 3 Sep 2010 10:53:39 +0100
Subject: gallivm: Add some utility functions to set/get array elements too.

---
 src/gallium/auxiliary/gallivm/lp_bld_struct.c | 46 +++++++++++++++++++++++++++
 src/gallium/auxiliary/gallivm/lp_bld_struct.h | 24 ++++++++++++++
 2 files changed, 70 insertions(+)

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_struct.c b/src/gallium/auxiliary/gallivm/lp_bld_struct.c
index 3998ac374f..c25b2f6493 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_struct.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_struct.c
@@ -70,3 +70,49 @@ lp_build_struct_get(LLVMBuilderRef builder,
    lp_build_name(res, "%s.%s", LLVMGetValueName(ptr), name);
    return res;
 }
+
+
+LLVMValueRef
+lp_build_array_get_ptr(LLVMBuilderRef builder,
+                       LLVMValueRef ptr,
+                       LLVMValueRef index)
+{
+   LLVMValueRef indices[2];
+   LLVMValueRef element_ptr;
+   indices[0] = LLVMConstInt(LLVMInt32Type(), 0, 0);
+   indices[1] = index;
+   element_ptr = LLVMBuildGEP(builder, ptr, indices, Elements(indices), "");
+#ifdef DEBUG
+   lp_build_name(element_ptr, "&%s[%s]",
+                 LLVMGetValueName(ptr), LLVMGetValueName(index));
+#endif
+   return element_ptr;
+}
+
+
+LLVMValueRef
+lp_build_array_get(LLVMBuilderRef builder,
+                   LLVMValueRef ptr,
+                   LLVMValueRef index)
+{
+   LLVMValueRef element_ptr;
+   LLVMValueRef res;
+   element_ptr = lp_build_array_get_ptr(builder, ptr, index);
+   res = LLVMBuildLoad(builder, element_ptr, "");
+#ifdef DEBUG
+   lp_build_name(res, "%s[%s]", LLVMGetValueName(ptr), LLVMGetValueName(index));
+#endif
+   return res;
+}
+
+
+void
+lp_build_array_set(LLVMBuilderRef builder,
+                   LLVMValueRef ptr,
+                   LLVMValueRef index,
+                   LLVMValueRef value)
+{
+   LLVMValueRef element_ptr;
+   element_ptr = lp_build_array_get_ptr(builder, ptr, index);
+   LLVMBuildStore(builder, value, element_ptr);
+}
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_struct.h b/src/gallium/auxiliary/gallivm/lp_bld_struct.h
index 147336edb4..f8b6dab4bf 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_struct.h
+++ b/src/gallium/auxiliary/gallivm/lp_bld_struct.h
@@ -71,5 +71,29 @@ lp_build_struct_get(LLVMBuilderRef builder,
                     unsigned member,
                     const char *name);
 
+/**
+ * Get value pointer to an array element.
+ */
+LLVMValueRef
+lp_build_array_get_ptr(LLVMBuilderRef builder,
+                       LLVMValueRef ptr,
+                       LLVMValueRef index);
+
+/**
+ * Get the value of an array element.
+ */
+LLVMValueRef
+lp_build_array_get(LLVMBuilderRef builder,
+                   LLVMValueRef ptr,
+                   LLVMValueRef index);
+
+/**
+ * Set the value of an array element.
+ */
+void
+lp_build_array_set(LLVMBuilderRef builder,
+                   LLVMValueRef ptr,
+                   LLVMValueRef index,
+                   LLVMValueRef value);
 
 #endif /* !LP_BLD_STRUCT_H */
-- 
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