[LLVMbugs] [Bug 2839] New: C Backend does not handle inline assembly correctly.

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Mon Sep 29 12:16:51 PDT 2008


           Summary: C Backend does not handle inline assembly correctly.
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Backend: C
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: haohui.mai at gmail.com
                CC: llvmbugs at cs.uiuc.edu

The LLVM IR is the following:

define void @test() nounwind {
  tail call void asm sideeffect "", "~{dirflag},~{fpsr},~{flags},~{memory}"()  
  ret void

Here is the generated C code:

void test() { 
   __asm__ volatile ("" 

It should be __asm__ volative("":::"memory").

The generated code lacks a colon that make the C code failed to compile.

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