From af20d46a39e4431b85d593f56912a185a157554e Mon Sep 17 00:00:00 2001
From: Mihai Preda <mhpreda@gmail.com>
Date: Mon, 2 May 2022 15:14:48 +0300
Subject: [PATCH] gallium: add opaque pointers shim for LLVM < 8.0
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LLVM is transitioning to "opaque pointers", and as such deprecates
LLVMBuildGEP, LLVMBuildCall, LLVMBuildLoad, replacing them with
LLVMBuildGEP2, LLVMBuildCall2, LLVMBuildLoad2 respectivelly.
These new functions were added in LLVM 8.0; so for LLVM before 8.0 we
simply forward to the non-opaque-pointer variants.

Acked-by: Marek Olšák <marek.olsak@amd.com>
Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15893>
---
 src/gallium/auxiliary/gallivm/lp_bld.h | 42 ++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/src/gallium/auxiliary/gallivm/lp_bld.h b/src/gallium/auxiliary/gallivm/lp_bld.h
index 9144428c8e1..5846afa3ce0 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld.h
+++ b/src/gallium/auxiliary/gallivm/lp_bld.h
@@ -87,4 +87,46 @@
 #define GALLIVM_HAVE_CORO 0
 #endif
 
+/* LLVM is transitioning to "opaque pointers", and as such deprecates
+ * LLVMBuildGEP, LLVMBuildCall, LLVMBuildLoad, replacing them with
+ * LLVMBuildGEP2, LLVMBuildCall2, LLVMBuildLoad2 respectivelly.
+ * These new functions were added in LLVM 8.0; so for LLVM before 8.0 we
+ * simply forward to the non-opaque-pointer variants.
+ */
+#if LLVM_VERSION_MAJOR < 8
+
+static inline LLVMValueRef
+LLVMBuildGEP2(LLVMBuilderRef B, LLVMTypeRef Ty,
+              LLVMValueRef Pointer, LLVMValueRef *Indices,
+              unsigned NumIndices, const char *Name)
+{
+   return LLVMBuildGEP(B, Pointer, Indices, NumIndices, Name);
+}
+
+static inline LLVMValueRef
+LLVMBuildInBoundsGEP2(LLVMBuilderRef B, LLVMTypeRef Ty,
+                      LLVMValueRef Pointer, LLVMValueRef *Indices,
+                      unsigned NumIndices, const char *Name)
+{
+   return LLVMBuildInBoundsGEP(B, Pointer, Indices, NumIndices, Name);
+}
+
+static inline LLVMValueRef
+LLVMBuildLoad2(LLVMBuilderRef B, LLVMTypeRef Ty,
+               LLVMValueRef PointerVal, const char *Name)
+{
+  LLVMValueRef val = LLVMBuildLoad(B, PointerVal, Name);
+  return LLVMTypeOf(val) == Ty ? val : LLVMBuildBitCast(B, val, Ty, Name);
+}
+
+static inline LLVMValueRef
+LLVMBuildCall2(LLVMBuilderRef B, LLVMTypeRef Ty, LLVMValueRef Fn,
+               LLVMValueRef *Args, unsigned NumArgs,
+               const char *Name)
+{
+   return LLVMBuildCall(B, Fn, Args, NumArgs, Name);
+}
+
+#endif /* LLVM_VERSION_MAJOR < 8 */
+
 #endif /* LP_BLD_H */