https://bugs.llvm.org/show_bug.cgi?id=42124
Bug ID: 42124
Summary: Incorrect inling cost calculation with new pass
manager
Product: new-bugs
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Created attachment 22072
--> https://bugs.llvm.org/attachment.cgi?id=22072&action=edit
Reduced reproducer
aec_port_reset_output_index is a small static method and is only called once.
There should be performance gain by inlining the method:
$ clang -c -w -O2 -Rpass=inline aec_port_reduced.c
aec_port_reduced.c:46:11: remark: aec_port_reset_output_index inlined into d
with (cost=-14955, threshold=225) [-Rpass=inline]
aec_port_reset_output_index();
^
However with the new pass manager:
$ clang -c -w -fexperimental-new-pass-manager -O2 -Rpass-missed=inline
aec_port_reduced.c
aec_port_reduced.c:46:11: remark: aec_port_reset_output_index not inlined into
d because too costly to inline (cost=45, threshold=45) [-Rpass-missed=inline]
aec_port_reset_output_index();
^
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