[ 4.8 Linaro regression] ICE on gcc-4.8 building kde4libs

this needs somebody to provide the preprocessed source. The compiler retries the build internally and succeeds, so somebody has to provide this who can reproduce this.

$ g++ -c -g -O2 SVGStyledLocatableElement.ii
In file included from ../../khtml/svg/SVGStyledLocatableElement.cpp:27:0:
../../khtml/svg/SVGStyledLocatableElement.h: In member function 'virtual WebCore::FloatRect WebCore::SVGStyledLocatableElement::_ZTv0_n24_NK7WebCore25SVGStyledLocatableElement7getBBoxEv() const':
../../khtml/svg/SVGStyledLocatableElement.h:45:27: error: unrecognizable insn:
(call_insn/j 10 9 11 2 (parallel [
            (set (parallel:BLK [
                        (expr_list:REG_DEP_TRUE (reg:SF 16 s0)
                            (const_int 0 [0]))
                        (expr_list:REG_DEP_TRUE (reg:SF 17 s1)
                            (const_int 4 [0x4]))
                        (expr_list:REG_DEP_TRUE (reg:SF 18 s2)
                            (const_int 8 [0x8]))
                        (expr_list:REG_DEP_TRUE (reg:SF 19 s3)
                            (const_int 12 [0xc]))
                    ])
                (call (mem:SI (symbol_ref:SI ("*.LTHUNK10") [flags 0x3] <function_decl 0xb22e1a00 *.LTHUNK10>) [0 *.LTHUNK10 S4 A32])
                    (const_int 0 [0])))
            (return)
            (use (const_int 0 [0]))
        ]) -1
     (nil)
    (expr_list:REG_CFA_WINDOW_SAVE (use (reg:SI 0 r0))
        (nil)))
../../khtml/svg/SVGStyledLocatableElement.h:45:27: internal compiler error: in extract_insn, at recog.c:2154
Please submit a full bug report,
with preprocessed source if appropriate.

seen with linaro 4.8, not with fsf 4.8

The unrecognizable insn is a "tail call". In 2013.05 release, it matches "sibcall_value_insn". But in 2013.06 release, it can not match it.

Recently there were some changes for "tail call". 2013.06 release might merge some of the changes.

Please try FSF trunk, if it also fails, please submit a bug against FSF trunk.

Same problem with 4.8-2013.06 on two different sub-archs. Reversion to 4.8-2013.05 works around the problem.

************************************
linaro gcc 4.6.2 2013.06 compiling Qt4 on armv7lhf

/home/kelly/Xilka/build/Qt4-4.8.5/Source/src/3rdparty/webkit/Source/WebCore/svg/SVGStyledLocatableElement.h: In member function ‘virtual WebCore::FloatRect WebCore::SVGStyledLocatableElement::_ZTv0_n24_NK7WebCore25SVGStyledLocatableElement7getBBoxENS_12SVGLocatable19StyleUpdateStrategyE(WebCore::SVGLocatable::StyleUpdateStrategy) const’:
/home/kelly/Xilka/build/Qt4-4.8.5/Source/src/3rdparty/webkit/Source/WebCore/svg/SVGStyledLocatableElement.h:38:23: error: unrecognizable insn:
     virtual FloatRect getBBox(StyleUpdateStrategy = AllowStyleUpdate) const;
                       ^
(call_insn/j 12 11 13 2 (parallel [
            (set (parallel:BLK [
                        (expr_list:REG_DEP_TRUE (reg:SF 16 s0)
                            (const_int 0 [0]))
                        (expr_list:REG_DEP_TRUE (reg:SF 17 s1)
                            (const_int 4 [0x4]))
                        (expr_list:REG_DEP_TRUE (reg:SF 18 s2)
                            (const_int 8 [0x8]))
                        (expr_list:REG_DEP_TRUE (reg:SF 19 s3)
                            (const_int 12 [0xc]))
                    ])
                (call (mem:SI (symbol_ref:SI ("*.LTHUNK11") [flags 0x3] <function_decl 0x7223fd80 *.LTHUNK11>) [0 *.LTHUNK11 S4 A32])
                    (const_int 0 [0])))
            (return)
            (use (const_int 0 [0]))
        ]) -1
     (nil)
    (expr_list:REG_CFA_WINDOW_SAVE (use (reg:SI 1 r1))
        (expr_list:REG_CFA_WINDOW_SAVE (use (reg:SI 0 r0))
            (nil))))
/home/kelly/Xilka/build/Qt4-4.8.5/Source/src/3rdparty/webkit/Source/WebCore/svg/SVGStyledLocatableElement.h:38:23: internal compiler error: in extract_insn, at recog.c:2150

/home/kelly/Xilka/build/Qt4-4.8.5/Source/src/3rdparty/webkit/Source/WebCore/svg/SVGStyledLocatableElement.h:38:23: internal compiler error: Segmentation fault

************************************
linaro gcc 4.6.2 2013.06 compiling GraphViz 2.30.1 on armv6zkhf

emit.c: In function 'splitBSpline.isra.13':
emit.c:2039:1: error: unrecognizable insn:
 }
 ^
(call_insn/j 58 57 59 4 (parallel [
            (set (parallel:BLK [
                        (expr_list:REG_DEP_TRUE (reg:DF 16 s0)
                            (const_int 0 [0]))
                        (expr_list:REG_DEP_TRUE (reg:DF 18 s2)
                            (const_int 8 [0x8]))
                    ])
                (call (mem:SI (symbol_ref:SI ("Bezier") [flags 0x41] <function_decl 0xb6ad2b80 Bezier>) [0 Bezier S4 A32])
                    (const_int 0 [0])))
            (return)
            (use (const_int 0 [0]))
        ]) emit.c:2004 -1
     (nil)
    (expr_list:REG_CFA_WINDOW_SAVE (use (reg:SI 3 r3))
        (expr_list:REG_CFA_WINDOW_SAVE (use (reg:SI 2 r2))
            (expr_list:DF (use (reg:DF 16 s0))
                (expr_list:REG_CFA_WINDOW_SAVE (use (reg:SI 1 r1))
                    (expr_list:REG_CFA_WINDOW_SAVE (use (reg:SI 0 r0))
                        (nil)))))))
emit.c:2039:1: internal compiler error: in extr...

https://launchpad.net/ubuntu/+source/compiz/1:0.9.9~daily13.04.18.1~13.04-0ubuntu2/+build/4762472/+files/buildlog_ubuntu-saucy-armhf.compiz_1%3A0.9.9%7Edaily13.04.18.1%7E13.04-0ubuntu2_FAILEDTOBUILD.txt.gz

Status changed to 'Confirmed' because the bug affects multiple users.

It appears that 2013.07 fixes this problem. I have rebuilt qt4 and graphviz with the new release without errors.

Other affected users should test that version.

will be fixed with the next GCC-4.8 upload

fixed in saucy