From 9547e8fd98c50f8e01cb5d92109a5c7ed6b862dd Mon Sep 17 00:00:00 2001 From: Jason Merrill Date: Tue, 15 Apr 2003 12:13:14 -0400 Subject: [PATCH] PR middle-end/10336, c++/10401 PR middle-end/10336, c++/10401 * jump.c (never_reached_warning): Also stop looking if we reach the beginning of the function. From-SVN: r65637 --- gcc/ChangeLog | 6 ++++++ gcc/jump.c | 3 ++- gcc/testsuite/gcc.dg/Wunreachable-4.c | 12 ++++++++++++ 3 files changed, 20 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/gcc.dg/Wunreachable-4.c diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 2856bc1683d..e2750ace4e5 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2003-04-14 Jason Merrill + + PR middle-end/10336, c++/10401 + * jump.c (never_reached_warning): Also stop looking if we reach the + beginning of the function. + 2003-04-15 Kaveh R. Ghazi PR target/10338 diff --git a/gcc/jump.c b/gcc/jump.c index b48bc6b0347..5563ee34581 100644 --- a/gcc/jump.c +++ b/gcc/jump.c @@ -1913,7 +1913,8 @@ never_reached_warning (avoided_insn, finish) us the head of a block, a NOTE_INSN_BASIC_BLOCK, which often follows the line note. */ for (insn = PREV_INSN (avoided_insn); ; insn = PREV_INSN (insn)) - if (GET_CODE (insn) != NOTE) + if (GET_CODE (insn) != NOTE + || NOTE_LINE_NUMBER (insn) == NOTE_INSN_FUNCTION_BEG) { insn = NEXT_INSN (insn); break; diff --git a/gcc/testsuite/gcc.dg/Wunreachable-4.c b/gcc/testsuite/gcc.dg/Wunreachable-4.c new file mode 100644 index 00000000000..38ae6f808c9 --- /dev/null +++ b/gcc/testsuite/gcc.dg/Wunreachable-4.c @@ -0,0 +1,12 @@ +/* PR middle-end/10336 */ +/* { dg-options "-Wunreachable-code" } */ + +void foo(int i) +{ + switch(i) { + case 0: + break; + case 1: + break; + } +} -- 2.30.2