[llvm-branch-commits] [llvm] RuntimeLibcalls: Add small_printf functions to emscripten (PR #167087)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-ir

Author: Matt Arsenault (arsenm)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/167087.diff


2 Files Affected:

- (modified) llvm/include/llvm/IR/RuntimeLibcalls.td (+4) 
- (added) llvm/test/Transforms/Util/DeclareRuntimeLibcalls/emscripten.ll (+6) 


``````````diff
diff --git a/llvm/include/llvm/IR/RuntimeLibcalls.td b/llvm/include/llvm/IR/RuntimeLibcalls.td
index dd06a3442cebb..ad11216c6ee9d 100644
--- a/llvm/include/llvm/IR/RuntimeLibcalls.td
+++ b/llvm/include/llvm/IR/RuntimeLibcalls.td
@@ -3457,6 +3457,7 @@ def SystemZZOSSystemLibrary
 def emscripten_return_address : RuntimeLibcallImpl<RETURN_ADDRESS>;
 
 def isWasm : RuntimeLibcallPredicate<"TT.isWasm()">;
+def isOSEmscripten : RuntimeLibcallPredicate<[{TT.isOSEmscripten()}]>;
 
 // Define the emscripten name for return address helper.
 // TODO: when implementing other Wasm backends, make this generic or only do
@@ -3468,6 +3469,9 @@ def WasmSystemLibrary
            exp10f, exp10,
            _Unwind_CallPersonality,
            emscripten_return_address,
+           LibcallImpls<(add __small_printf,
+                             __small_sprintf,
+                             __small_fprintf), isOSEmscripten>,
            __stack_chk_fail, __stack_chk_guard)>;
 
 //===----------------------------------------------------------------------===//
diff --git a/llvm/test/Transforms/Util/DeclareRuntimeLibcalls/emscripten.ll b/llvm/test/Transforms/Util/DeclareRuntimeLibcalls/emscripten.ll
new file mode 100644
index 0000000000000..f92f0fe2a189f
--- /dev/null
+++ b/llvm/test/Transforms/Util/DeclareRuntimeLibcalls/emscripten.ll
@@ -0,0 +1,6 @@
+; REQUIRES: webassembly-registered-target
+; RUN: opt -S -passes=declare-runtime-libcalls -mtriple=wasm64-unknown-emscripten < %s | FileCheck %s
+
+; CHECK: declare void @__small_fprintf(...)
+; CHECK: declare void @__small_printf(...)
+; CHECK: declare void @__small_sprintf(...)

``````````

</details>


https://github.com/llvm/llvm-project/pull/167087