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authorEddie Hung <eddieh@ece.ubc.ca>2019-04-03 06:27:41 -0700
committerGitHub <noreply@github.com>2019-04-03 06:27:41 -0700
commitef84b434a529fc8bc76ececbd531b5ddd39a4392 (patch)
tree54e4ff55d78ed88f5735e6cd1d10e15d222ff9f0
parent721fa1cbd87c52a3adfce260f35fc33a7ae7ac4d (diff)
parent39380c45ba6cb4d2aa3f8c5757a2f1a61f85f8eb (diff)
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Merge pull request #913 from smunaut/fix_proc_mux
proc_mux: Fix crash when trying to optimize non-existant mux to shiftx
-rw-r--r--passes/proc/proc_mux.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/passes/proc/proc_mux.cc b/passes/proc/proc_mux.cc
index 7d3d23408..bac2dc2cd 100644
--- a/passes/proc/proc_mux.cc
+++ b/passes/proc/proc_mux.cc
@@ -361,7 +361,7 @@ RTLIL::SigSpec signal_to_mux_tree(RTLIL::Module *mod, SnippetSwCache &swcache, d
}
// Transform into a $shiftx where possible
- if (shiftx && last_mux_cell->type == "$pmux") {
+ if (shiftx && last_mux_cell && last_mux_cell->type == "$pmux") {
// Create bit-blasted $shiftx-es that shifts by the address line used in the case statement
auto pmux_b_port = last_mux_cell->getPort("\\B");
auto pmux_y_port = last_mux_cell->getPort("\\Y");