http://llvm.org/bugs/show_bug.cgi?id=18239
Bug ID: 18239
Summary: Incorrect CPU selected in cc1 for 3 ARM architectures
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Driver
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Giving the following architectures to the -target option in clang results in
surprising CPU selection in cc1:
1) armv5tej: -target-cpu arm1022e (expected arm926ej-s)
2) armv6j: -target-cpu arm1136jf-s (expected arm1136j-s)
3) armv6z: -target-cpu arm1136jf-s (expected arm1176jzf-s)
I'm not convinced that (2) is wrong, but it is inconsistent with the mapping
given in function getARMCPUForMArch in lib/Driver/Tools.cpp.
(1) and (3) seem incorrect as well as inconsistent with the mapping. 1022e does
not implement the 'j' part of v5tej, and 1136jf-s does not implement the 'z'
part of armv6z.
This is captured in FIXMEs in test/Driver/arm-cortex-cpus.c.
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