[LLVMbugs] [Bug 2255] New: getCopyRegToReg() does not support ST(1) as dest register
bugzilla-daemon at cs.uiuc.edu
bugzilla-daemon at cs.uiuc.edu
Sun Apr 27 16:35:52 PDT 2008
http://llvm.org/bugs/show_bug.cgi?id=2255
Summary: getCopyRegToReg() does not support ST(1) as dest
register
Product: libraries
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Backend: X86
AssignedTo: unassignedbugs at nondot.org
ReportedBy: asl at math.spbu.ru
CC: llvmbugs at cs.uiuc.edu
Created an attachment (id=1607)
--> (http://llvm.org/bugs/attachment.cgi?id=1607)
Test bytecode
Consider attached testcase. I'm having:
llc: /home/asl/proj/llvm/src/lib/Target/X86/X86InstrInfo.cpp:1593: virtual void
llvm::X86InstrInfo::copyRegToReg(llvm::MachineBasicBlock&,
llvm::ilist_iterator<llvm::MachineInstr>, unsigned int, unsigned int, const
llvm::TargetRegisterClass*, const llvm::TargetRegisterClass*) const: Assertion
`DestReg == X86::ST0 && "Can only copy to TOS right now"' failed.
This currently prevents mingw64 CRT bootstrap with llvm-gcc
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