http://llvm.org/bugs/show_bug.cgi?id=22786
Bug ID: 22786
Summary: Missed optimization due to instcombine + sroa creating
inttoptr on 32bit platforms
Product: new-bugs
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 13984
--> http://llvm.org/bugs/attachment.cgi?id=13984&action=edit
Testcase
InstCombine turns memcpys of 8 bytes into a load/store which SROA might later
split up into smaller values. In the attached test case, this ends up
extracting a pointer to doing a trunc + inttoptr operation, which stops the
second conditional branch from being eliminated, although it's clear that the
branch to "panic" will never be taken.
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