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| author | Jakub Jelinek <jakub@redhat.com> | 2018-01-26 12:48:05 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2018-01-26 12:48:05 +0100 |
| commit | 45399fdc7c120342bb1b84595e0d54deb58c7235 (patch) | |
| tree | 26b1069c17b0e7061e660af8f998563a8d4a12e3 /gcc | |
| parent | 79fbdeb87e6e91a8179465ea56007e493c7ca751 (diff) | |
| download | gcc-45399fdc7c120342bb1b84595e0d54deb58c7235.zip gcc-45399fdc7c120342bb1b84595e0d54deb58c7235.tar.gz gcc-45399fdc7c120342bb1b84595e0d54deb58c7235.tar.bz2 | |
re PR rtl-optimization/83985 (Compile time hog for 32-bit BE powerpc targets)
PR rtl-optimization/83985
* dce.c (deletable_insn_p): Return false for separate shrink wrapping
REG_CFA_RESTORE insns.
(delete_unmarked_insns): Don't ignore separate shrink wrapping
REG_CFA_RESTORE insns here.
* gcc.dg/pr83985.c: New test.
From-SVN: r257087
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/dce.c | 15 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 3 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr83985.c | 25 |
4 files changed, 40 insertions, 9 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 32fb7ba..764368a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2018-01-26 Jakub Jelinek <jakub@redhat.com> + PR rtl-optimization/83985 + * dce.c (deletable_insn_p): Return false for separate shrink wrapping + REG_CFA_RESTORE insns. + (delete_unmarked_insns): Don't ignore separate shrink wrapping + REG_CFA_RESTORE insns here. + PR c/83989 * gimple-ssa-warn-restrict.c (builtin_memref::builtin_memref): Don't use SSA_NAME_VAR as base for SSA_NAMEs with non-NULL SSA_NAME_VAR. @@ -131,6 +131,12 @@ deletable_insn_p (rtx_insn *insn, bool fast, bitmap arg_stores) && REGNO (pic_offset_table_rtx) >= FIRST_PSEUDO_REGISTER) return false; + /* Callee-save restores are needed. */ + if (RTX_FRAME_RELATED_P (insn) + && crtl->shrink_wrapped_separate + && find_reg_note (insn, REG_CFA_RESTORE, NULL)) + return false; + body = PATTERN (insn); switch (GET_CODE (body)) { @@ -592,15 +598,6 @@ delete_unmarked_insns (void) if (!dbg_cnt (dce)) continue; - if (crtl->shrink_wrapped_separate - && find_reg_note (insn, REG_CFA_RESTORE, NULL)) - { - if (dump_file) - fprintf (dump_file, "DCE: NOT deleting insn %d, it's a " - "callee-save restore\n", INSN_UID (insn)); - continue; - } - if (dump_file) fprintf (dump_file, "DCE: Deleting insn %d\n", INSN_UID (insn)); diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index c484d5b..5fa94c8 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,5 +1,8 @@ 2018-01-26 Jakub Jelinek <jakub@redhat.com> + PR rtl-optimization/83985 + * gcc.dg/pr83985.c: New test. + PR c/83989 * c-c++-common/Wrestrict-3.c: New test. diff --git a/gcc/testsuite/gcc.dg/pr83985.c b/gcc/testsuite/gcc.dg/pr83985.c new file mode 100644 index 0000000..51cfc49 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr83985.c @@ -0,0 +1,25 @@ +/* PR rtl-optimization/83985 */ +/* { dg-do compile } */ +/* { dg-options "-O2" } */ +/* { dg-additional-options "-mcpu=e300c3 -mtune=e300c3" { target { powerpc*-*-* && ilp32 } } } */ + +long long int v; + +void +foo (int x) +{ + if (x == 0) + return; + + while (v < 2) + { + signed char *a; + v /= x; + a = v == 0 ? (signed char *) &x : (signed char *) &v; + ++*a; + ++v; + } + + while (1) + ; +} |