https://llvm.org/bugs/show_bug.cgi?id=27644
Bug ID: 27644
Summary: [MIPS] LA macro expansion limitation for PIC mode
Product: tools
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: llvm-as
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
In current version of llvm-as, LA macro is incorrectly expanded when in PIC
mode.
Real life example from Chromium source, sandbox/linux/seccomp-bpf/syscall.cc:
la $v0, 2f
in PIC mode is expanded to
lui v0,0x0
addiu v0,v0,0
instead of something like:
lw v0,0(gp)
addiu v0,v0,96
This issue is a reference for future work.
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