LLVM-OPT-REPORT(1) LLVM LLVM-OPT-REPORT(1) NAME llvm-opt-report - generate optimization report from YAML SYNOPSIS llvm-opt-report [options] [input] DESCRIPTION llvm-opt-report is a tool to generate an optimization report from YAML optimization record files. You need to create an input YAML optimization record file before run- ning llvm-opt-report. $ clang -c foo.c -o foo.o -O3 -fsave-optimization-record Then, you create a report using the llvm-opt-report command with the YAML optimization record file foo.opt.yaml as input. $ llvm-opt-report foo.opt.yaml -o foo.lst foo.lst is the generated optimization report. < foo.c 1 | void bar(); 2 | void foo() { bar(); } 3 | 4 | void Test(int *res, int *c, int *d, int *p, int n) { 5 | int i; 6 | 7 | #pragma clang loop vectorize(assume_safety) 8 V4,1 | for (i = 0; i < 1600; i++) { 9 | res[i] = (p[i] == 0) ? res[i] : res[i] + d[i]; 10 | } 11 | 12 U16 | for (i = 0; i < 16; i++) { 13 | res[i] = (p[i] == 0) ? res[i] : res[i] + d[i]; 14 | } 15 | 16 I | foo(); 17 | 18 | foo(); bar(); foo(); I | ^ I | ^ 19 | } 20 | Symbols printed on the left side of the program indicate what kind of optimization was performed. The meanings of the symbols are as fol- lows: • I: The function is inlined. • U: The loop is unrolled. The following number indicates the unroll factor. • V: The loop is vectorized. The following numbers indicate the vector length and the interleave factor. OPTIONS If input is “-” or omitted, llvm-opt-report reads from standard input. Otherwise, it will read from the specified filename. If the -o option is omitted, then llvm-opt-report will send its output to standard output. If the -o option specifies “-”, then the output will also be sent to standard output. --help Display available options. --version Display the version of this program. --format=<string> The format of the optimization record file. The Argument is one of the following: • yaml • yaml-strtab • bitstream --no-demangle Do not demangle function names. -o=<string> Output file. -r=<string> Root for relative input paths. -s Do not include vectorization factors, etc. EXIT STATUS llvm-opt-report returns 0 on success. Otherwise, an error message is printed to standard error, and the tool returns 1. AUTHOR Maintained by the LLVM Team (https://llvm.org/). COPYRIGHT 2003-2023, LLVM Project 15 2023-10-16 LLVM-OPT-REPORT(1)
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