https://bugs.llvm.org/show_bug.cgi?id=39658
Bug ID: 39658
Summary: X86CondBrFolding causes miscompile
Product: new-bugs
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: new bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Created attachment 21116
--> https://bugs.llvm.org/attachment.cgi?id=21116&action=edit
test.ll
X86CondBrFolding pass first introduced in patch
https://reviews.llvm.org/rL343993 has caused incorrect calculations on one of
our Java tests. The calculation resuit is OK when this transform is turned off
by setting the option x86-condbr-folding to 0.
I haven't figured out what exactly is wrong in what this pass is doing.
To reproduce, run llc on the test.ll in attachment.
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