nikic wrote:
@tgross35 Libcalls are handled by the backend. I think you'd have to modify the
CC_X86_Win64_C / RetCC_X86_Win64_C calling conventions in
https://github.com/llvm/llvm-project/blob/main/llvm/lib/Target/X86/X86CallingConv.td
for that.
https://github.com/llvm/llvm-project/pull/11505
tgross35 wrote:
It seems like arguments aren't actually getting passed indirectly to libcalls.
Simple test program
```c
#include
#include
union ty128 {
struct { uint64_t hi, lo; } u64x2;
__float128 f128;
};
void f128_add(__float128 a, __float128 b) {
union ty128 cvt;
cvt.f128 =
@@ -0,0 +1,19 @@
+// RUN: %clang_cc1 -triple x86_64-windows-gnu -emit-llvm -o - %s \
+// RUN:| FileCheck %s --check-prefix=GNU64
+// __float128 is unsupported on MSVC
+
+__float128 fp128_ret(void) { return 0; }
+// GNU64: define dso_local void @fp128_ret(ptr dead_on_unwind noa
https://github.com/tgross35 updated
https://github.com/llvm/llvm-project/pull/115052
>From 432e8a66156f08d45ad691017255364cfb0fd947 Mon Sep 17 00:00:00 2001
From: Trevor Gross
Date: Tue, 5 Nov 2024 07:00:35 -0500
Subject: [PATCH 1/2] [clang] Add fp128 ABI tests for MinGW (NFC)
Duplicate `win64
llvmbot wrote:
@llvm/pr-subscribers-backend-x86
@llvm/pr-subscribers-clang
Author: Trevor Gross (tgross35)
Changes
Clang currently passes and returns `__float128` in vector registers on MinGW
targets. However, the Windows x86-64 calling convention [1] states the
following:
> __m128 type
tgross35 wrote:
Cc @beetrees and @wesleywiser
https://github.com/llvm/llvm-project/pull/115052
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https://github.com/tgross35 created
https://github.com/llvm/llvm-project/pull/115052
Clang currently passes and returns `__float128` in vector registers on MinGW
targets. However, the Windows x86-64 calling convention [1] states the
following:
> __m128 types, arrays, and strings are never pas
