Merge remote-tracking branch 'origin/master' into llvm13

Conflicts:

 * cmake/Findclang.cmake
 * cmake/Findlld.cmake
 * cmake/Findllvm.cmake

In master branch, more search paths were added to these files with "12"
in the path. In this commit I updated them to "13".

 * src/stage1/codegen.cpp
 * src/zig_llvm.cpp
 * src/zig_llvm.h

In master branch, ZigLLVMBuildCmpXchg is improved to add
`is_single_threaded`. However, the LLVM 13 C API has this already, and
in the llvm13 branch, ZigLLVMBuildCmpXchg is deleted in favor of the C
API. In this commit I updated stage2 to use the LLVM 13 C API rather
than depending on an improved ZigLLVMBuildCmpXchg.

Additionally, src/target.zig largestAtomicBits needed to be updated to
include the new m68k ISA.

1 files changed, 52 insertions, 0 deletions

diff --git a/src/zig_llvm.cpp b/src/zig_llvm.cpp
index 83f3be3144..4d40c45adc 100644
--- a/src/zig_llvm.cpp
+++ b/src/zig_llvm.cpp
@@ -484,6 +484,58 @@ LLVMValueRef ZigLLVMBuildSMin(LLVMBuilderRef B, LLVMValueRef LHS, LLVMValueRef R
     return wrap(call_inst);
 }
 
+LLVMValueRef ZigLLVMBuildSAddSat(LLVMBuilderRef B, LLVMValueRef LHS, LLVMValueRef RHS, const char *name) {
+    CallInst *call_inst = unwrap(B)->CreateBinaryIntrinsic(Intrinsic::sadd_sat, unwrap(LHS), unwrap(RHS), nullptr, name);
+    return wrap(call_inst);
+}
+
+LLVMValueRef ZigLLVMBuildUAddSat(LLVMBuilderRef B, LLVMValueRef LHS, LLVMValueRef RHS, const char *name) {
+    CallInst *call_inst = unwrap(B)->CreateBinaryIntrinsic(Intrinsic::uadd_sat, unwrap(LHS), unwrap(RHS), nullptr, name);
+    return wrap(call_inst);
+}
+
+LLVMValueRef ZigLLVMBuildSSubSat(LLVMBuilderRef B, LLVMValueRef LHS, LLVMValueRef RHS, const char *name) {
+    CallInst *call_inst = unwrap(B)->CreateBinaryIntrinsic(Intrinsic::ssub_sat, unwrap(LHS), unwrap(RHS), nullptr, name);
+    return wrap(call_inst);
+}
+
+LLVMValueRef ZigLLVMBuildUSubSat(LLVMBuilderRef B, LLVMValueRef LHS, LLVMValueRef RHS, const char *name) {
+    CallInst *call_inst = unwrap(B)->CreateBinaryIntrinsic(Intrinsic::usub_sat, unwrap(LHS), unwrap(RHS), nullptr, name);
+    return wrap(call_inst);
+}
+
+LLVMValueRef ZigLLVMBuildSMulFixSat(LLVMBuilderRef B, LLVMValueRef LHS, LLVMValueRef RHS, const char *name) {
+    llvm::Type* types[1] = {
+        unwrap(LHS)->getType(), 
+    };
+    // pass scale = 0 as third argument
+    llvm::Value* values[3] = {unwrap(LHS), unwrap(RHS), unwrap(B)->getInt32(0)};
+    
+    CallInst *call_inst = unwrap(B)->CreateIntrinsic(Intrinsic::smul_fix_sat, types, values, nullptr, name);
+    return wrap(call_inst);
+}
+
+LLVMValueRef ZigLLVMBuildUMulFixSat(LLVMBuilderRef B, LLVMValueRef LHS, LLVMValueRef RHS, const char *name) {
+    llvm::Type* types[1] = {
+        unwrap(LHS)->getType(), 
+    };
+    // pass scale = 0 as third argument
+    llvm::Value* values[3] = {unwrap(LHS), unwrap(RHS), unwrap(B)->getInt32(0)};
+    
+    CallInst *call_inst = unwrap(B)->CreateIntrinsic(Intrinsic::umul_fix_sat, types, values, nullptr, name);
+    return wrap(call_inst);
+}
+
+LLVMValueRef ZigLLVMBuildSShlSat(LLVMBuilderRef B, LLVMValueRef LHS, LLVMValueRef RHS, const char *name) {
+    CallInst *call_inst = unwrap(B)->CreateBinaryIntrinsic(Intrinsic::sshl_sat, unwrap(LHS), unwrap(RHS), nullptr, name);
+    return wrap(call_inst);
+}
+
+LLVMValueRef ZigLLVMBuildUShlSat(LLVMBuilderRef B, LLVMValueRef LHS, LLVMValueRef RHS, const char *name) {
+    CallInst *call_inst = unwrap(B)->CreateBinaryIntrinsic(Intrinsic::ushl_sat, unwrap(LHS), unwrap(RHS), nullptr, name);
+    return wrap(call_inst);
+}
+
 void ZigLLVMFnSetSubprogram(LLVMValueRef fn, ZigLLVMDISubprogram *subprogram) {
     assert( isa<Function>(unwrap(fn)) );
     Function *unwrapped_function = reinterpret_cast<Function*>(unwrap(fn));