http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37014 --- a/gcc/dojump.c +++ b/gcc/dojump.c @@ -307,8 +307,6 @@ break; } - case TRUTH_ANDIF_EXPR: - case TRUTH_ORIF_EXPR: case COMPOUND_EXPR: /* Lowered by gimplify.c. */ gcc_unreachable (); @@ -518,6 +516,7 @@ if (BRANCH_COST >= 4 || TREE_SIDE_EFFECTS (TREE_OPERAND (exp, 1))) goto normal; + case TRUTH_ANDIF_EXPR: if (if_false_label == NULL_RTX) { drop_through_label = gen_label_rtx (); @@ -538,6 +537,7 @@ if (BRANCH_COST >= 4 || TREE_SIDE_EFFECTS (TREE_OPERAND (exp, 1))) goto normal; + case TRUTH_ORIF_EXPR: if (if_true_label == NULL_RTX) { drop_through_label = gen_label_rtx (); --- a/gcc/expr.c +++ b/gcc/expr.c @@ -8563,7 +8563,10 @@ /* If no set-flag instruction, must generate a conditional store into a temporary variable. Drop through and handle this like && and ||. */ - + /* Although TRUTH_{AND,OR}IF_EXPR aren't present in GIMPLE, they + are occassionally created by folding during expansion. */ + case TRUTH_ANDIF_EXPR: + case TRUTH_ORIF_EXPR: if (! ignore && (target == 0 || modifier == EXPAND_STACK_PARM @@ -8761,8 +8774,6 @@ case POSTDECREMENT_EXPR: case LOOP_EXPR: case EXIT_EXPR: - case TRUTH_ANDIF_EXPR: - case TRUTH_ORIF_EXPR: /* Lowered by gimplify.c. */ gcc_unreachable (); --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/20080812-1.c @@ -0,0 +1,21 @@ +/* PR middle-end/37014 */ + +void bar (signed char *); + +void +foo (int x, int y) +{ + int i; + signed char a[123], b[123], c; + for (i = 0; i < 123; i++) + { + int e = y - x; + int d = e < 0 ? -e : e; + c = d < 75; + a[y] = c; + b[y] = c; + y--; + } + bar (b); + bar (a); +}