[LLVMbugs] [Bug 5314] New: LLVM 2.6 failed to buid Linux 2.6.31

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=5314

           Summary: LLVM 2.6 failed to buid Linux 2.6.31
           Product: new-bugs
           Version: 2.6
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: blocker
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: tiago.maluta at gmail.com
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=3702)
 --> (http://llvm.org/bugs/attachment.cgi?id=3702)
-emit-llvm output 

I'm using LLVM 2.6 to buid Linux 2.6.31-git. I read here and old
thread about kernel and llvm-2.3 [1] so I'd like to ask again.

# make CROSS_COMPILE=llvm- V=1
(...)
 llvm-gcc -Wp,-MD,init/.main.o.d  -nostdinc -isystem
/usr/lib/llvm-gcc-4.2-2.6/lib/gcc/i686-pc-linux-gnu/4.2.1/include
-Iinclude  -I/opt/linux-2.6/arch/x86/include -include
include/linux/autoconf.h -D__KERNEL__ -Wall -Wundef
-Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common
-Werror-implicit-function-declaration -Wno-format-security
-fno-delete-null-pointer-checks -Os -m32 -msoft-float -mregparm=3
-freg-struct-return -mpreferred-stack-boundary=2 -march=i686
-mtune=core2 -mtune=generic -Wa,-mtune=generic32 -ffreestanding
-DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -pipe
-Wno-sign-compare -fno-asynchronous-unwind-tables -mno-sse -mno-mmx
-mno-sse2 -mno-3dnow -fno-stack-protector -fno-omit-frame-pointer
-fno-optimize-sibling-calls -pg -Wdeclaration-after-statement
-Wno-pointer-sign -fno-strict-overflow   -D"KBUILD_STR(s)=#s"
-D"KBUILD_BASENAME=KBUILD_STR(main)"
-D"KBUILD_MODNAME=KBUILD_STR(main)"  -c -o init/.tmp_main.o
init/main.c
UNREACHABLE executed!
init/main.c:908: internal compiler error: Aborted
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://llvm.org/bugs/> for instructions.
make[1]: *** [init/main.o] Error 1
make: *** [init] Error 2

I'm using objdump and objcopy from my system (x86-32)

Some information. I used -emit-llvm on a single line to put .o information

# llvm-gcc -emit-llvm -Wp,-MD,init/.main.o.d  -nostdinc -isystem
/usr/lib/llvm-gcc-4.2-2.6/lib/gcc/i686-pc-linux-gnu/4.2.1/include -Iinclude 
-I/opt/linux-2.6/arch/x86/include -include include/linux/autoconf.h
-D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs
-fno-strict-aliasing -fno-common -Werror-implicit-function-declaration
-Wno-format-security -fno-delete-null-pointer-checks -Os -m32 -msoft-float
-mregparm=3 -freg-struct-return -mpreferred-stack-boundary=2 -march=i686
-mtune=core2 -mtune=generic -Wa,-mtune=generic32 -ffreestanding
-DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -pipe -Wno-sign-compare
-fno-asynchronous-unwind-tables -mno-sse -mno-mmx -mno-sse2 -mno-3dnow
-fno-stack-protector -fno-omit-frame-pointer -fno-optimize-sibling-calls -pg
-Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow  
-D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(main)" 
-D"KBUILD_MODNAME=KBUILD_STR(main)"  -c -o init/.tmp_main.o init/main.c


And added --save-temps on kernel Makefile to get the preprocessed compiler
output (.i)


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