diff options
Diffstat (limited to 'llvm/docs/CommandGuide/llvm-mca.rst')
| -rw-r--r-- | llvm/docs/CommandGuide/llvm-mca.rst | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/llvm/docs/CommandGuide/llvm-mca.rst b/llvm/docs/CommandGuide/llvm-mca.rst index 03913076866..35642b57af4 100644 --- a/llvm/docs/CommandGuide/llvm-mca.rst +++ b/llvm/docs/CommandGuide/llvm-mca.rst @@ -36,7 +36,14 @@ substring ``LLVM-MCA-END`` marks the end of a code region. For example: ... # LLVM-MCA-END -Inline assembly directives may also be used from source code to annotate the +Multiple regions can be specified provided that they do not overlap. A code +region can have an optional description. If no user-defined region is specified, +then :program:`llvm-mca` assumes a default region which contains every +instruction in the input file. Every region is analyzed in isolation, and the +final performance report is the union of all the reports generated for every +code region. + +Inline assembly directives may be used from source code to annotate the assembly text: .. code-block:: c++ @@ -54,14 +61,7 @@ directly into llvm-mca for analysis: .. code-block:: bash - $ clang foo.cpp -O2 -target x86_64-unknown-unknown -S -o - | llvm-mca -mcpu=btver2 - -Multiple regions can be specified provided that they do not overlap. A code -region can have an optional description. If no user defined region is specified, -then :program:`llvm-mca` assumes a default region which contains every -instruction in the input file. Every region is analyzed in isolation, and the -final performance report is the union of all the reports generated for every -code region. + $ clang foo.c -O2 -target x86_64-unknown-unknown -S -o - | llvm-mca -mcpu=btver2 OPTIONS ------- |
