llvm-6502/sret-implicit.ll at a7db376a63e56f2347cdd3a72e1823f238c70630 - llvm-6502 - Applefritter: Git

6502/llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-15 20:29:48 +00:00

Andrew Trick c4ae8cbc5d X86 ABI fix for return values > 24 bytes.

The return value's address must be returned in %rax.
i.e. the callee needs to copy the sret argument (%rdi)
into the return value (%rax).

This probably won't manifest as a bug when the caller is LLVM-compiled
code. But it is an ABI guarantee and tools expect it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228321 91177308-0d34-0410-b5e6-96231b3b80d8

2015-02-05 18:09:05 +00:00

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 ; RUN: llc -mtriple=x86_64-apple-darwin8 < %s | FileCheck %s
 ; RUN: llc -mtriple=x86_64-pc-linux < %s | FileCheck %s
 ; CHECK-LABEL: return32
 ; CHECK-DAG: movq	$0, (%rdi)
 ; CHECK-DAG: movq	%rdi, %rax
 ; CHECK: retq
 define i256 @return32() {
   ret i256 0
 }