[LLVMbugs] [Bug 2270] New: Assertion `UpdatedSlot < StackTop && Dest < 7' failed.

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=2270

           Summary: Assertion `UpdatedSlot < StackTop && Dest < 7' failed.
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: edwintorok at gmail.com
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=1612)
 --> (http://llvm.org/bugs/attachment.cgi?id=1612)
full testcase

While building glibc  this error occurs 3 times:

cc1: /home/edwin/llvm/llvm-svn/trunk/lib/Target/X86/X86FloatingPoint.cpp:858:
void<unnamed>::FPS::handleTwoArgFP(llvm::ilist_iterator<llvm::MachineInstr>&):
Assertion `UpdatedSlot < StackTop && Dest < 7' failed.
../sysdeps/ieee754/ldbl-96/e_asinl.c:161: internal compiler error: Aborted

To reproduce:

$ llc x.bc -f
llc: /home/edwin/llvm/llvm-svn/trunk/lib/Target/X86/X86FloatingPoint.cpp:858:
void<unnamed>::FPS::handleTwoArgFP(llvm::ilist_iterator<llvm::MachineInstr>&):
Assertion `UpdatedSlot < StackTop && Dest < 7' failed.
llc[0x852b506]
/lib/i686/cmov/libc.so.6(abort+0x101)[0x4ecdc871]
/lib/i686/cmov/libc.so.6(__assert_fail+0xee)[0x4ecd40ee]
llc[0x81012cc]
Aborted

$ llc bugpoint-reduced-simplified.bc -f
llc: /home/edwin/llvm/llvm-svn/trunk/lib/Target/X86/X86FloatingPoint.cpp:92:
unsigned int<unnamed>::FPS::getStackEntry(unsigned int) const: Assertion `STi <
StackTop && "Access past stack top!"' failed.
llc[0x852b506]
/lib/i686/cmov/libc.so.6(abort+0x101)[0x4ecdc871]
/lib/i686/cmov/libc.so.6(__assert_fail+0xee)[0x4ecd40ee]
llc[0x80ff2f4]
Aborted

; ModuleID = 'bugpoint-reduced-simplified.bc'
target datalayout =
"e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32"
target triple = "i386-pc-linux-gnu"

define x86_fp80 @__ieee754_asinl(x86_fp80 %x) nounwind  {
entry:
        %asmtmp = call x86_fp80 asm sideeffect "fsqrt",
"={st},0,~{dirflag},~{fpsr},~{flags}"( x86_fp80 0xK00000000000000000000 )
nounwind              ; <x86_fp80> [#uses=0]
        %tmp243 = sub x86_fp80 0xK80000000000000000000, 0xK00000000000000000000
        ; <x86_fp80> [#uses=1]
        ret x86_fp80 %tmp243
}


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