shader: Avoid usage of C++20 ranges to build in clang

src/shader_recompiler/ir_opt/constant_propagation_pass.cpp

@@ -3,7 +3,6 @@
 // Refer to the license.txt file included.
 
 #include <algorithm>
-#include <ranges>
 #include <tuple>
 #include <type_traits>
 
@@ -599,7 +598,9 @@ void ConstantPropagation(IR::Block& block, IR::Inst& inst) {
 } // Anonymous namespace
 
 void ConstantPropagationPass(IR::Program& program) {
-    for (IR::Block* const block : program.post_order_blocks | std::views::reverse) {
+    const auto end{program.post_order_blocks.rend()};
+    for (auto it = program.post_order_blocks.rbegin(); it != end; ++it) {
+        IR::Block* const block{*it};
         for (IR::Inst& inst : block->Instructions()) {
             ConstantPropagation(*block, inst);
         }

src/shader_recompiler/ir_opt/dead_code_elimination_pass.cpp

@@ -2,8 +2,6 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#include <ranges>
-
 #include "shader_recompiler/frontend/ir/basic_block.h"
 #include "shader_recompiler/frontend/ir/value.h"
 #include "shader_recompiler/ir_opt/passes.h"

src/shader_recompiler/ir_opt/dual_vertex_pass.cpp

@@ -2,12 +2,6 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#include <algorithm>
-#include <ranges>
-
-#include "common/bit_cast.h"
-#include "common/bit_util.h"
-#include "shader_recompiler/exception.h"
 #include "shader_recompiler/frontend/ir/ir_emitter.h"
 #include "shader_recompiler/ir_opt/passes.h"
 

src/shader_recompiler/ir_opt/global_memory_to_storage_buffer_pass.cpp

@@ -5,7 +5,6 @@
 #include <algorithm>
 #include <compare>
 #include <optional>
-#include <ranges>
 #include <queue>
 
 #include <boost/container/flat_set.hpp>

src/shader_recompiler/ir_opt/lower_int64_to_int32.cpp

@@ -2,7 +2,6 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#include <ranges>
 #include <utility>
 
 #include "shader_recompiler/exception.h"
@@ -207,7 +206,9 @@ void Lower(IR::Block& block, IR::Inst& inst) {
 } // Anonymous namespace
 
 void LowerInt64ToInt32(IR::Program& program) {
-    for (IR::Block* const block : program.post_order_blocks | std::views::reverse) {
+    const auto end{program.post_order_blocks.rend()};
+    for (auto it = program.post_order_blocks.rbegin(); it != end; ++it) {
+        IR::Block* const block{*it};
         for (IR::Inst& inst : block->Instructions()) {
             Lower(*block, inst);
         }

src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp

@@ -14,7 +14,6 @@
 //      https://link.springer.com/chapter/10.1007/978-3-642-37051-9_6
 //
 
-#include <ranges>
 #include <span>
 #include <variant>
 #include <vector>
@@ -243,7 +242,9 @@ public:
     void SealBlock(IR::Block* block) {
         const auto it{incomplete_phis.find(block)};
         if (it != incomplete_phis.end()) {
-            for (auto& [variant, phi] : it->second) {
+            for (auto& pair : it->second) {
+                auto& variant{pair.first};
+                auto& phi{pair.second};
                 std::visit([&](auto& variable) { AddPhiOperands(variable, *phi, block); }, variant);
             }
         }
@@ -373,8 +374,9 @@ void VisitBlock(Pass& pass, IR::Block* block) {
 
 void SsaRewritePass(IR::Program& program) {
     Pass pass;
-    for (IR::Block* const block : program.post_order_blocks | std::views::reverse) {
-        VisitBlock(pass, block);
+    const auto end{program.post_order_blocks.rend()};
+    for (auto block = program.post_order_blocks.rbegin(); block != end; ++block) {
+        VisitBlock(pass, *block);
     }
 }