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Re: [llvm-dev] DragonEgg for GCC v8.x and LLVM v6.x is just able to work


On Mon, Aug 21, 2017, at 05:31, Leslie Zhai via llvm-dev wrote:
> Hi LLVM and GCC developers,
> 
> My sincere thanks will goto:
> 
> * Duncan, the core developer of llvm-gcc and dragonegg 
> http://llvm.org/devmtg/2009-10/Sands_LLVMGCCPlugin.pdf
> 
> * David, the innovator and developer of GCC 
> https://dmalcolm.fedorapeople.org/gcc/global-state/requirements.html
> 
> and others who give me kind response for teaching me patiently and 
> carefully about how to migrate GCC v4.8.x to GCC v8.x (git-20170818)
> 
> DragonEgg has been migrated to GCC v8.x and LLVM v6.x (svn-r311142), but 
> also able to work for GCC v4.8.x and LLVM v3.3 
> https://reviews.llvm.org/D35667 and it is just able to work now, for 
> example:

Very interesting. We are still using dragonegg to process our weather
modeling codes here at ETH / CSCS. Having it updated to work with latest
LLVM will provide us with a current baseline which will also be helpful
to evaluate flang further. Thanks a lot for your effort.

Best,
Tobias

PS: Would be great to have a flang update on the mailing list as well. I
will ask for this in a separate email.

> 
> 
> $CC -fplugin=./dragonegg.so \
>          -fplugin-arg-dragonegg-debug-pass-arguments \
>          -ftime-report \
>          -fverbose-asm \
>          -fplugin-arg-dragonegg-enable-gcc-optzns \
>          -fplugin-arg-dragonegg-emit-ir \
>          -S \
>          test/hello.c \
>          -wrapper gdb,--args
> 
> 
> hello.s (LLVM IR, the extension name is not important)
> 
> ; ModuleID = 'test/hello.c'
> source_filename = "test/hello.c"
> target triple = "x86_64-redhat-linux"
> 
> module asm "\09.ident\09\22GCC: (GNU) 6.4.1 20170727 (Red Hat 6.4.1-1) 
> LLVM: 3.9.1\22"
> 
> @__func__.2210 = internal local_unnamed_addr constant [4 x i8] c"foo\00"
> @.cst = private local_unnamed_addr constant [24 x i8] c"DEBUG: %s, line 
> %d: %s\0A\00", align 8
> @.cst.1 = private local_unnamed_addr constant [13 x i8] 
> c"test/hello.c\00", align 8
> @.cst.2 = private local_unnamed_addr constant [12 x i8] c"Leslie 
> Zhai\00", align 8
> @.cst.3 = private local_unnamed_addr constant [20 x i8] c"%s: Hello 
> World %d\0A\00", align 8
> 
> ; Function Attrs: nounwind uwtable
> define void @foo(...) unnamed_addr #0 {
> entry:
>    %"ssa point" = bitcast i32 0 to i32
>    br label %"<bb 2>"
> 
> "<bb 2>":                                         ; preds = %entry
>    %0 = call i32 (i8*, ...) @printf(i8* noalias getelementptr inbounds 
> ([24 x i8], [24 x i8]* @.cst, i64 0, i64 0), [13 x i8]* @.cst.1, i32 4, 
> [4 x i8]* @__func__.2210) #1
>    br label %return
> 
> return:                                           ; preds = %"<bb 2>"
>    ret void
> }
> 
> declare i32 @printf(i8*, ...)
> 
> ; Function Attrs: nounwind uwtable
> define i32 @main(i32 %argc, i8** %argv) unnamed_addr #0 {
> entry:
>    %argc_addr = alloca i32, align 4
>    %argv_addr = alloca i8**, align 8
>    %n = alloca i32
>    %s = alloca i8*
>    %"<retval>" = alloca i32
>    %"alloca point" = bitcast i32 0 to i32
>    store i32 %argc, i32* %argc_addr, align 1
>    store i8** %argv, i8*** %argv_addr, align 1
>    %"ssa point" = bitcast i32 0 to i32
>    br label %"<bb 2>"
> 
> "<bb 2>":                                         ; preds = %entry
>    %0 = call i32 (i8*, ...) @printf(i8* noalias getelementptr inbounds 
> ([20 x i8], [20 x i8]* @.cst.3, i64 0, i64 0), i8* getelementptr 
> inbounds ([12 x i8], [12 x i8]* @.cst.2, i64 0, i64 0), i32 1) #1
>    br label %"<L0>"
> 
> "<L0>":                                           ; preds = %"<bb 2>"
>    store i32 0, i32* %"<retval>", align 1
>    br label %return
> 
> return:                                           ; preds = %"<L0>"
>    %1 = load i32, i32* %"<retval>", align 4
>    ret i32 %1
> }
> 
> attributes #0 = { nounwind uwtable
> "no-frame-pointer-elim-non-leaf"="true" }
> attributes #1 = { nounwind }
> 
> !llvm.module.flags = !{!0}
> 
> !0 = !{i32 1, !"PIE Level", i32 2}
> 
> 
> $ llc hello.s
> 
>      .text
>      .file    "hello.s"
>                                          # Start of file scope inline 
> assembly
>      .ident    "GCC: (GNU) 6.4.1 20170727 (Red Hat 6.4.1-1) LLVM: 3.9.1"
> 
>                                          # End of file scope inline
>                                          assembly
>      .globl    foo
>      .p2align    4, 0x90
>      .type    foo,@function
> foo:                                    # @foo
>      .cfi_startproc
> # BB#0:                                 # %entry
>      pushq    %rbp
> .Ltmp0:
>      .cfi_def_cfa_offset 16
> .Ltmp1:
>      .cfi_offset %rbp, -16
>      movq    %rsp, %rbp
> .Ltmp2:
>      .cfi_def_cfa_register %rbp
>      movl    $.L.cst, %edi
>      movl    $.L.cst.1, %esi
>      movl    $4, %edx
>      movl    $__func__.2210, %ecx
>      xorl    %eax, %eax
>      callq    printf
>      popq    %rbp
>      retq
> .Lfunc_end0:
>      .size    foo, .Lfunc_end0-foo
>      .cfi_endproc
> 
>      .globl    main
>      .p2align    4, 0x90
>      .type    main,@function
> main:                                   # @main
>      .cfi_startproc
> # BB#0:                                 # %entry
>      pushq    %rbp
> .Ltmp3:
>      .cfi_def_cfa_offset 16
> .Ltmp4:
>      .cfi_offset %rbp, -16
>      movq    %rsp, %rbp
> .Ltmp5:
>      .cfi_def_cfa_register %rbp
>      subq    $32, %rsp
>      movl    %edi, -8(%rbp)
>      movq    %rsi, -16(%rbp)
>      movl    $.L.cst.3, %edi
>      movl    $.L.cst.2, %esi
>      movl    $1, %edx
>      xorl    %eax, %eax
>      callq    printf
>      movl    $0, -4(%rbp)
>      movl    -4(%rbp), %eax
>      addq    $32, %rsp
>      popq    %rbp
>      retq
> .Lfunc_end1:
>      .size    main, .Lfunc_end1-main
>      .cfi_endproc
> 
>      .type    __func__.2210,@object   # @__func__.2210
>      .section    .rodata,"a",@progbits
> __func__.2210:
>      .asciz    "foo"
>      .size    __func__.2210, 4
> 
>      .type    .L.cst,@object          # @.cst
>      .p2align    3
> .L.cst:
>      .asciz    "DEBUG: %s, line %d: %s\n"
>      .size    .L.cst, 24
> 
>      .type    .L.cst.1,@object        # @.cst.1
>      .p2align    3
> .L.cst.1:
>      .asciz    "test/hello.c"
>      .size    .L.cst.1, 13
> 
>      .type    .L.cst.2,@object        # @.cst.2
>      .p2align    3
> .L.cst.2:
>      .asciz    "Leslie Zhai"
>      .size    .L.cst.2, 12
> 
>      .type    .L.cst.3,@object        # @.cst.3
>      .p2align    3
> .L.cst.3:
>      .asciz    "%s: Hello World %d\n"
>      .size    .L.cst.3, 20
> 
> 
>      .section    ".note.GNU-stack","",@progbits
> 
> 
> $ clang hello.s.s
> 
> $ ./a.out
> 
> Leslie Zhai: Hello World 1
> 
> 
> WIP:
> 
> * fix issues https://github.com/xiangzhai/dragonegg/issues
> 
> * gengtype not support macro 
> https://gcc.gnu.org/ml/gcc/2017-07/msg00045.html
> 
> -- 
> Regards,
> Leslie Zhai - a LLVM developer https://reviews.llvm.org/p/xiangzhai/
> 
> 
> 
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev@lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev


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