[Bug middle-end/39297] [4.4 Regression] gcc.dg/tree-ssa/loop-31.c

[hjl dot tools at gmail dot com]

------- Comment #7 from hjl dot tools at gmail dot com  2009-02-25 15:09 -------
Revision 144405 gave:

        .text
        .align 16
        .global foo#
        .type   foo#, @function
        .proc foo#
foo:
        .prologue
        .body
        cmp4.ge p6, p7 = 0, r32
        (p6) br.cond.spnt .L2
        addl r14 = @ltoffx(a#), r1
        ;;
        ld8.mov r14 = [r14], a#
        adds r16 = -1, r32
        ;;
        addp4 r16 = r16, r0
        addl r15 = @gprel(.LC0), gp
        ;;
        ld8 r15 = [r15]
        ;;
        shladd r15 = r16, 1, r15
.L3:
        st2 [r14] = r33, 2
        ;;
        cmp.ne p6, p7 = r15, r14
        (p6) br.cond.sptk .L3
.L2:
        addl r14 = @ltoffx(a#), r1
        ;;
        ld8.mov r14 = [r14], a#
        ;;
        ld2 r8 = [r14]
        br.ret.sptk.many b0
        ;;
        .endp foo#

Revision 144404 gave:

        .proc foo#
foo:
        .prologue
        .save ar.lc, r2
        mov r2 = ar.lc
        .body
        cmp4.ge p6, p7 = 0, r32
        (p6) br.cond.spnt .L2
        adds r15 = -1, r32
        ;;
        addp4 r15 = r15, r0
        ;;
        adds r15 = 1, r15
        addl r14 = @ltoffx(a#), r1
        ;;
        ld8.mov r14 = [r14], a#
        ;;
        shladd r15 = r15, 1, r14
        ;;
        sub r15 = r15, r14
        ;;
        adds r15 = -2, r15
        ;;
        shr.u r15 = r15, 1
        ;;
        mov ar.lc = r15
.L3:
        st2 [r14] = r33, 2
        ;;
        br.cloop.sptk.few .L3
.L2:
        addl r14 = @ltoffx(a#), r1
        ;;
        ld8.mov r14 = [r14], a#
        ;;
        ld2 r8 = [r14]
        mov ar.lc = r2
        br.ret.sptk.many b0
        ;;
        .endp foo#


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39297