https://github.com/arsenm updated
https://github.com/llvm/llvm-project/pull/143082
>From 3a86744d174eee01d384e690de6c30897fe51f8f Mon Sep 17 00:00:00 2001
From: Matt Arsenault <matthew.arsena...@amd.com>
Date: Fri, 6 Jun 2025 14:50:57 +0900
Subject: [PATCH] RuntimeLibcalls: Use array initializers for default values
---
llvm/include/llvm/IR/RuntimeLibcalls.h | 7 +++++--
llvm/lib/IR/RuntimeLibcalls.cpp | 7 -------
2 files changed, 5 insertions(+), 9 deletions(-)
diff --git a/llvm/include/llvm/IR/RuntimeLibcalls.h
b/llvm/include/llvm/IR/RuntimeLibcalls.h
index d8f467e30fa6a..3e1531ebfd9d6 100644
--- a/llvm/include/llvm/IR/RuntimeLibcalls.h
+++ b/llvm/include/llvm/IR/RuntimeLibcalls.h
@@ -103,10 +103,13 @@ struct RuntimeLibcallsInfo {
private:
/// Stores the name each libcall.
- const char *LibcallRoutineNames[RTLIB::UNKNOWN_LIBCALL + 1];
+ const char *LibcallRoutineNames[RTLIB::UNKNOWN_LIBCALL + 1] = {nullptr};
+
+ static_assert(static_cast<int>(CallingConv::C) == 0,
+ "default calling conv should be encoded as 0");
/// Stores the CallingConv that should be used for each libcall.
- CallingConv::ID LibcallCallingConvs[RTLIB::UNKNOWN_LIBCALL];
+ CallingConv::ID LibcallCallingConvs[RTLIB::UNKNOWN_LIBCALL] = {};
/// The condition type that should be used to test the result of each of the
/// soft floating-point comparison libcall against integer zero.
diff --git a/llvm/lib/IR/RuntimeLibcalls.cpp b/llvm/lib/IR/RuntimeLibcalls.cpp
index 000414c6d91cc..d3dcb3eb2adcf 100644
--- a/llvm/lib/IR/RuntimeLibcalls.cpp
+++ b/llvm/lib/IR/RuntimeLibcalls.cpp
@@ -232,19 +232,12 @@ void
RuntimeLibcallsInfo::initSoftFloatCmpLibcallPredicates() {
/// Set default libcall names. If a target wants to opt-out of a libcall it
/// should be placed here.
void RuntimeLibcallsInfo::initLibcalls(const Triple &TT) {
- std::fill(std::begin(LibcallRoutineNames), std::end(LibcallRoutineNames),
- nullptr);
-
initSoftFloatCmpLibcallPredicates();
#define HANDLE_LIBCALL(code, name) setLibcallName(RTLIB::code, name);
#include "llvm/IR/RuntimeLibcalls.def"
#undef HANDLE_LIBCALL
- // Initialize calling conventions to their default.
- for (int LC = 0; LC < RTLIB::UNKNOWN_LIBCALL; ++LC)
- setLibcallCallingConv((RTLIB::Libcall)LC, CallingConv::C);
-
// Use the f128 variants of math functions on x86
if (TT.isX86() && TT.isGNUEnvironment()) {
setLibcallName(RTLIB::REM_F128, "fmodf128");
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