| commit | 602cfc746e9e0447221896a3d93608c6db3a89e5 | |
| author | Lin Sinan <sinan.lin@linux.alibaba.com> | |
| Sun, 5 Mar 2023 08:09:50 +0000 (5 16:09 +0800) | ||
| committer | Kito Cheng <kito.cheng@sifive.com> | |
| Sun, 5 Mar 2023 08:59:16 +0000 (5 16:59 +0800) | ||
| tree | 4dabfecbd076403b5e8c639b06f750a2f1cbb766 | treesnapshot (tar.gz zip) |
| parent | 9debb240a4b1a711c0648fd9e4385dbde5ad45fd | commitdiff |
RISC-V: Allow const0_rtx operand in max/min
Optimize cases that use max[u]/min[u] against a zero constant.
E.g., the case int f(int x) { return x >= 0 ? x : 0; }
the current asm output in rv64gc_zba_zbb
li rtmp,0
max a0,a0,rtmp
could be optimized into
max a0,a0,zero
gcc/ChangeLog:
* config/riscv/bitmanip.md: allow 0 constant in max/min
pattern.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/zbb-min-max-03.c: New test.
Optimize cases that use max[u]/min[u] against a zero constant.
E.g., the case int f(int x) { return x >= 0 ? x : 0; }
the current asm output in rv64gc_zba_zbb
li rtmp,0
max a0,a0,rtmp
could be optimized into
max a0,a0,zero
gcc/ChangeLog:
* config/riscv/bitmanip.md: allow 0 constant in max/min
pattern.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/zbb-min-max-03.c: New test.
| gcc/config/riscv/bitmanip.md | diffblobblamehistory | |
| gcc/testsuite/gcc.target/riscv/zbb-min-max-03.c | [new file with mode: 0644] | blob |