Mesa (master): llvmpipe: Utility function to get the pointer to a structure member.

[Jose Fonseca]

Module: Mesa
Branch: master
Commit: b1eff018c7a07502c673032ef6426f49364146be
URL:    
http://cgit.freedesktop.org/mesa/mesa/commit/?id=b1eff018c7a07502c673032ef6426f49364146be

Author: José Fonseca <jfons...@vmware.com>
Date:   Mon Sep  7 14:25:02 2009 +0100

llvmpipe: Utility function to get the pointer to a structure member.

---

 src/gallium/drivers/llvmpipe/lp_bld_struct.c |   21 +++++++++++++++++----
 src/gallium/drivers/llvmpipe/lp_bld_struct.h |   12 ++++++++++++
 2 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/src/gallium/drivers/llvmpipe/lp_bld_struct.c 
b/src/gallium/drivers/llvmpipe/lp_bld_struct.c
index 14d2b10..3998ac3 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_struct.c
+++ b/src/gallium/drivers/llvmpipe/lp_bld_struct.c
@@ -42,17 +42,30 @@
 
 
 LLVMValueRef
+lp_build_struct_get_ptr(LLVMBuilderRef builder,
+                        LLVMValueRef ptr,
+                        unsigned member,
+                        const char *name)
+{
+   LLVMValueRef indices[2];
+   LLVMValueRef member_ptr;
+   indices[0] = LLVMConstInt(LLVMInt32Type(), 0, 0);
+   indices[1] = LLVMConstInt(LLVMInt32Type(), member, 0);
+   member_ptr = LLVMBuildGEP(builder, ptr, indices, Elements(indices), "");
+   lp_build_name(member_ptr, "%s.%s_ptr", LLVMGetValueName(ptr), name);
+   return member_ptr;
+}
+
+
+LLVMValueRef
 lp_build_struct_get(LLVMBuilderRef builder,
                     LLVMValueRef ptr,
                     unsigned member,
                     const char *name)
 {
-   LLVMValueRef indices[2];
    LLVMValueRef member_ptr;
    LLVMValueRef res;
-   indices[0] = LLVMConstInt(LLVMInt32Type(), 0, 0);
-   indices[1] = LLVMConstInt(LLVMInt32Type(), member, 0);
-   member_ptr = LLVMBuildGEP(builder, ptr, indices, Elements(indices), "");
+   member_ptr = lp_build_struct_get_ptr(builder, ptr, member, name);
    res = LLVMBuildLoad(builder, member_ptr, "");
    lp_build_name(res, "%s.%s", LLVMGetValueName(ptr), name);
    return res;
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_struct.h 
b/src/gallium/drivers/llvmpipe/lp_bld_struct.h
index cbefdc9..740392f 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_struct.h
+++ b/src/gallium/drivers/llvmpipe/lp_bld_struct.h
@@ -53,6 +53,18 @@
              offsetof(_ctype, _cmember))
 
 
+/**
+ * Get value pointer to a structure member.
+ */
+LLVMValueRef
+lp_build_struct_get_ptr(LLVMBuilderRef builder,
+                        LLVMValueRef ptr,
+                        unsigned member,
+                        const char *name);
+
+/**
+ * Get the value of a structure member.
+ */
 LLVMValueRef
 lp_build_struct_get(LLVMBuilderRef builder,
                     LLVMValueRef ptr,

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