Commit Graph

4 Commits

Author SHA1 Message Date
Fangrui Song 012dd42e02 [X86] Support -march=x86-64-v[234]
PR47686. These micro-architecture levels are defined in the x86-64 psABI:

https://gitlab.com/x86-psABIs/x86-64-ABI/-/commit/77566eb03bc6a326811cb7e9

GCC 11 will support these levels.

Note, -mtune=x86-64-v[234] are invalid and __builtin_cpu_is cannot be
used on them.

Reviewed By: craig.topper, RKSimon

Differential Revision: https://reviews.llvm.org/D89197
2020-10-12 10:29:46 -07:00
Craig Topper 71f3169e1b [X86] Default to -mtune=generic unless -march is passed to the driver. Add TuneCPU to the AST serialization
This patch defaults to -mtune=generic unless -march is present. If -march is present we'll use the empty string unless its overridden by mtune. The back should use the target cpu if the tune-cpu isn't present.

It also adds AST serialization support to fix some tests that emit AST and parse it back. These tests diff the IR against the output from not going through AST. So if we don't serialize the tune CPU we fail the diff.

Differential Revision: https://reviews.llvm.org/D86488
2020-08-26 14:52:03 -07:00
Craig Topper cc7bf9bcbf [X86] Allow 32-bit mode only CPUs with -mtune on 64-bit targets
gcc errors on this, but I'm nervous that since -mtune has been
ignored by clang for so long that there may be code bases out
there that pass 32-bit cpus to clang.
2020-08-22 16:38:05 -07:00
Craig Topper 4a36711439 [X86] Add mtune command line test cases that should have gone with 4cbceb74bb 2020-08-19 15:58:06 -07:00