aboutsummaryrefslogtreecommitdiffstats
path: root/lib/hipe/icode
diff options
context:
space:
mode:
Diffstat (limited to 'lib/hipe/icode')
-rw-r--r--lib/hipe/icode/hipe_icode_exceptions.erl10
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/hipe/icode/hipe_icode_exceptions.erl b/lib/hipe/icode/hipe_icode_exceptions.erl
index 787fb05415..3c8f7b5712 100644
--- a/lib/hipe/icode/hipe_icode_exceptions.erl
+++ b/lib/hipe/icode/hipe_icode_exceptions.erl
@@ -344,6 +344,16 @@ pop_catch(Cs) ->
pop_catch_1([[_|C] | Cs]) ->
[C | pop_catch_1(Cs)];
+pop_catch_1([[] | Cs]) ->
+ %% The elements in the list represent different possible incoming
+ %% stacks of catch handlers to this BB. Before the fixpoint has
+ %% been found these elements are underapproximations of the true
+ %% stacks, therefore it's possible for these elements to be too
+ %% short for the number of pops implied by the code in the BB.
+ %% We must not fail in that case, so we set pop([]) = [].
+ %% This fixes find_catches_crash.erl and compiler_tests in the
+ %% HiPE test suite.
+ [[] | pop_catch_1(Cs)];
pop_catch_1([]) ->
[].