[llvm-bugs] [Bug 32528] New: no way to specify inteldialect for module level inline assembly

via llvm-bugs llvm-bugs at lists.llvm.org
Tue Apr 4 21:10:02 PDT 2017


https://bugs.llvm.org/show_bug.cgi?id=32528

            Bug ID: 32528
           Summary: no way to specify inteldialect for module level inline
                    assembly
           Product: libraries
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: superjoe30 at gmail.com
                CC: llvm-bugs at lists.llvm.org

The following IR module works correctly, which uses AT&T syntax for
module-level inline assembly:

source_filename = "./hello.asm"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

module asm ".text"
module asm ".globl _start"
module asm ""
module asm "_start:"
module asm "    mov $1, %rax"
module asm "    mov $1, %rdi"
module asm "    mov $msg, %rsi"
module asm "    mov $14, %rdx"
module asm "    syscall"
module asm ""
module asm "    mov $60, %rax"
module asm "    mov $0, %rdi"
module asm "    syscall"
module asm ""
module asm ".data"
module asm ""
module asm "msg:"
module asm "    .ascii \22Hello, world!\5Cn\22"


However the following IR module does not work, since there is no way to specify
Intel dialect for module-level inline assembly:

source_filename = "./hello.asm"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

module asm inteldialect ".text"
module asm inteldialect ".globl _start"
module asm inteldialect ""
module asm inteldialect "_start:"
module asm inteldialect "    mov rax, 1"
module asm inteldialect "    mov rdi, 1"
module asm inteldialect "    mov rsi, msg"
module asm inteldialect "    mov rdx, 14"
module asm inteldialect "    syscall"
module asm inteldialect ""
module asm inteldialect "    mov rax, 60"
module asm inteldialect "    mov rdi, 0"
module asm inteldialect "    syscall"
module asm inteldialect ""
module asm inteldialect ".data"
module asm inteldialect ""
module asm inteldialect "msg:"
module asm inteldialect "    .ascii \22Hello, world!\5Cn\22"


hello.ll:5:12: error: expected string constant
module asm inteldialect ".text"
           ^


inline assembly supports inteldialect, so module-level inline assembly should
support it too.

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