Auto merge of #18317 - lnicola:sync-from-rust, r=Veykril

minor: sync from downstream

2 files changed, 20 insertions, 7 deletions

diff --git a/compiler/rustc_llvm/llvm-wrapper/CoverageMappingWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/CoverageMappingWrapper.cpp
index 8ee05977320..cda81d4a9b5 100644
--- a/compiler/rustc_llvm/llvm-wrapper/CoverageMappingWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/CoverageMappingWrapper.cpp
@@ -183,7 +183,7 @@ extern "C" void LLVMRustCoverageWriteMappingToBuffer(
            RustMappingRegions, NumMappingRegions)) {
     MappingRegions.emplace_back(
         fromRust(Region.Count), fromRust(Region.FalseCount),
-#if LLVM_VERSION_GE(18, 0) && LLVM_VERSION_LT(19, 0)
+#if LLVM_VERSION_LT(19, 0)
         coverage::CounterMappingRegion::MCDCParameters{},
 #endif
         Region.FileID, Region.ExpandedFileID, // File IDs, then region info.
diff --git a/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
index 8faa5212408..72b03fa0560 100644
--- a/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
@@ -1533,27 +1533,40 @@ extern "C" LLVMValueRef LLVMRustBuildCall(LLVMBuilderRef B, LLVMTypeRef Ty,
 
 extern "C" LLVMValueRef
 LLVMRustGetInstrProfIncrementIntrinsic(LLVMModuleRef M) {
+#if LLVM_VERSION_GE(20, 0)
+  return wrap(llvm::Intrinsic::getOrInsertDeclaration(
+      unwrap(M), llvm::Intrinsic::instrprof_increment));
+#else
   return wrap(llvm::Intrinsic::getDeclaration(
       unwrap(M), llvm::Intrinsic::instrprof_increment));
+#endif
 }
 
 extern "C" LLVMValueRef
 LLVMRustGetInstrProfMCDCParametersIntrinsic(LLVMModuleRef M) {
-#if LLVM_VERSION_GE(19, 0)
-  return wrap(llvm::Intrinsic::getDeclaration(
+#if LLVM_VERSION_LT(19, 0)
+  report_fatal_error("LLVM 19.0 is required for mcdc intrinsic functions");
+#endif
+#if LLVM_VERSION_GE(20, 0)
+  return wrap(llvm::Intrinsic::getOrInsertDeclaration(
       unwrap(M), llvm::Intrinsic::instrprof_mcdc_parameters));
 #else
-  report_fatal_error("LLVM 19.0 is required for mcdc intrinsic functions");
+  return wrap(llvm::Intrinsic::getDeclaration(
+      unwrap(M), llvm::Intrinsic::instrprof_mcdc_parameters));
 #endif
 }
 
 extern "C" LLVMValueRef
 LLVMRustGetInstrProfMCDCTVBitmapUpdateIntrinsic(LLVMModuleRef M) {
-#if LLVM_VERSION_GE(19, 0)
-  return wrap(llvm::Intrinsic::getDeclaration(
+#if LLVM_VERSION_LT(19, 0)
+  report_fatal_error("LLVM 19.0 is required for mcdc intrinsic functions");
+#endif
+#if LLVM_VERSION_GE(20, 0)
+  return wrap(llvm::Intrinsic::getOrInsertDeclaration(
       unwrap(M), llvm::Intrinsic::instrprof_mcdc_tvbitmap_update));
 #else
-  report_fatal_error("LLVM 19.0 is required for mcdc intrinsic functions");
+  return wrap(llvm::Intrinsic::getDeclaration(
+      unwrap(M), llvm::Intrinsic::instrprof_mcdc_tvbitmap_update));
 #endif
 }