From 00bfd702dc8c3b760b4f965fd059a5f1db8bb2b1 Mon Sep 17 00:00:00 2001
From: Krasimir Georgiev <krasimir@google.com>
Date: Mon, 17 Jun 2024 09:35:38 +0000
Subject: [PATCH] Disable MC/DC tests on LLVM 19

Disable the tests and generate an error if MC/DC is used on LLVM 19.
The support will be ported separately, as it is substantially
different on LLVM 19, and there are no plans to support both
versions.
---
 compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp | 2 +-
 tests/coverage/mcdc/condition-limit.rs           | 1 +
 tests/coverage/mcdc/if.rs                        | 1 +
 tests/coverage/mcdc/inlined_expressions.rs       | 1 +
 tests/coverage/mcdc/nested_if.rs                 | 1 +
 tests/coverage/mcdc/non_control_flow.rs          | 1 +
 6 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
index 4cdd8af1008..2ff7335a0fc 100644
--- a/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
@@ -1555,7 +1555,7 @@ LLVMRustGetInstrProfMCDCTVBitmapUpdateIntrinsic(LLVMModuleRef M) {
 
 extern "C" LLVMValueRef
 LLVMRustGetInstrProfMCDCCondBitmapIntrinsic(LLVMModuleRef M) {
-#if LLVM_VERSION_GE(18, 0)
+#if LLVM_VERSION_GE(18, 0) && LLVM_VERSION_LT(19, 0)
   return wrap(llvm::Intrinsic::getDeclaration(
       unwrap(M), llvm::Intrinsic::instrprof_mcdc_condbitmap_update));
 #else
diff --git a/tests/coverage/mcdc/condition-limit.rs b/tests/coverage/mcdc/condition-limit.rs
index 571c600ebd0..2ff46b11a16 100644
--- a/tests/coverage/mcdc/condition-limit.rs
+++ b/tests/coverage/mcdc/condition-limit.rs
@@ -1,6 +1,7 @@
 #![feature(coverage_attribute)]
 //@ edition: 2021
 //@ min-llvm-version: 18
+//@ ignore-llvm-version: 19 - 99
 //@ compile-flags: -Zcoverage-options=mcdc
 //@ llvm-cov-flags: --show-branches=count --show-mcdc
 
diff --git a/tests/coverage/mcdc/if.rs b/tests/coverage/mcdc/if.rs
index d8e6b61a9d5..6f589659a3d 100644
--- a/tests/coverage/mcdc/if.rs
+++ b/tests/coverage/mcdc/if.rs
@@ -1,6 +1,7 @@
 #![feature(coverage_attribute)]
 //@ edition: 2021
 //@ min-llvm-version: 18
+//@ ignore-llvm-version: 19 - 99
 //@ compile-flags: -Zcoverage-options=mcdc
 //@ llvm-cov-flags: --show-branches=count --show-mcdc
 
diff --git a/tests/coverage/mcdc/inlined_expressions.rs b/tests/coverage/mcdc/inlined_expressions.rs
index 65f7ee66f39..fc1e4dae37c 100644
--- a/tests/coverage/mcdc/inlined_expressions.rs
+++ b/tests/coverage/mcdc/inlined_expressions.rs
@@ -1,6 +1,7 @@
 #![feature(coverage_attribute)]
 //@ edition: 2021
 //@ min-llvm-version: 18
+//@ ignore-llvm-version: 19 - 99
 //@ compile-flags: -Zcoverage-options=mcdc -Copt-level=z -Cllvm-args=--inline-threshold=0
 //@ llvm-cov-flags: --show-branches=count --show-mcdc
 
diff --git a/tests/coverage/mcdc/nested_if.rs b/tests/coverage/mcdc/nested_if.rs
index f5068b5dcc2..f9ce7a0bc25 100644
--- a/tests/coverage/mcdc/nested_if.rs
+++ b/tests/coverage/mcdc/nested_if.rs
@@ -1,6 +1,7 @@
 #![feature(coverage_attribute)]
 //@ edition: 2021
 //@ min-llvm-version: 18
+//@ ignore-llvm-version: 19 - 99
 //@ compile-flags: -Zcoverage-options=mcdc
 //@ llvm-cov-flags: --show-branches=count --show-mcdc
 
diff --git a/tests/coverage/mcdc/non_control_flow.rs b/tests/coverage/mcdc/non_control_flow.rs
index 77e64e6625b..633d381a1aa 100644
--- a/tests/coverage/mcdc/non_control_flow.rs
+++ b/tests/coverage/mcdc/non_control_flow.rs
@@ -1,6 +1,7 @@
 #![feature(coverage_attribute)]
 //@ edition: 2021
 //@ min-llvm-version: 18
+//@ ignore-llvm-version: 19 - 99
 //@ compile-flags: -Zcoverage-options=mcdc
 //@ llvm-cov-flags: --show-branches=count --show-mcdc