[LLVMdev] [cfe-dev] [RFC PATCH] X32 ABI support for Clang/compiler-rt

[Steven Newbury]

On Thu, 2013-08-22 at 09:02 +0100, Steven Newbury wrote:
> On Thu, 2013-08-22 at 11:29 +0400, Alexey Samsonov wrote:
> > Ah, I've replied in a different thread already. What Dmitri says - If
> > you're interesting in only building the Clang on x32 host, you may avoid
> > checking out compiler-rt repo for now.
> > 
> > 
> compiler-rt does make a convenient compiler test though.. :)
> 
> fatal error: error in backend: Cannot select: 0x30ccf38: ch = brind
> 0x30cccf8:1, 0x30cc368 [ORD=109] [ID=11]
>   0x30cc368: i32 = add 0x30cccf8, 0x30cc518 [ORD=109] [ID=10]
>     0x30cccf8: i32,ch = load 0x30cc2d8:1, 0x30ccfc8,
> 0x30cc6c8<LD4[JumpTable]> [ORD=109] [ID=9]
>       0x30ccfc8: i32 = add 0x30cc5a8, 0x30cc518 [ORD=109] [ID=8]
>         0x30cc5a8: i32 = shl 0x30cc2d8, 0x30ccc68 [ORD=109] [ID=7]
>           0x30cc2d8: i32,ch = CopyFromReg 0x30a6168, 0x30cc908 [ORD=109]
> [ID=5]
>             0x30cc908: i32 = Register %vreg29 [ID=1]
>           0x30ccc68: i8 = Constant<2> [ID=4]
>         0x30cc518: i32 = X86ISD::WrapperRIP 0x30ccab8 [ID=6]
>           0x30ccab8: i32 = TargetJumpTable<0> [ID=3]
>       0x30cc6c8: i32 = undef [ID=2]
>     0x30cc518: i32 = X86ISD::WrapperRIP 0x30ccab8 [ID=6]
>       0x30ccab8: i32 = TargetJumpTable<0> [ID=3]
> In function: __atomic_compare_exchange
> clang: error: clang frontend command failed with exit code 70 (use -v to
> see invocation)
> clang version 3.4 (trunk)
> Target: x86_64-pc-linux-gnux32
> Thread model: posix
> 
> This is what happens when compiling compiler-rt with -m64 or -mx32,
> exact same error without my patches (where -mx32 is supported).
> However, I know -mx32 isn't working since the objects always end up
> elf_x86_64, which is why I known this is a somewhat unrelated bug.
> 
I should add, with -m32, the same clang compiles atomic.c without error.