This patch transforms the following POW calls to equivalent LDEXP calls, as discussed in PR57492:
powi (2.0, i) -> ldexp (1.0, i) a * powi (2.0, i) -> ldexp (a, i) 2.0 * powi (2.0, i) -> ldexp (1.0, i + 1) pow (powof2, i) -> ldexp (1.0, i * log2 (powof2)) powof2 * pow (2, i) -> ldexp (1.0, i + log2 (powof2)) This is especially helpful for SVE architectures as LDEXP calls can be implemented using the FSCALE instruction, as seen in the following patch: https://gcc.gnu.org/pipermail/gcc-patches/2024-September/664160.html SPEC2017 was run with this patch, while there are no noticeable improvements, there are no non-noise regressions either. The patch was bootstrapped and regtested on aarch64-linux-gnu, no regression. OK for mainline? Signed-off-by: Soumya AR <soum...@nvidia.com> gcc/ChangeLog: PR target/57492 * match.pd: Added patterns to fold certain calls to pow to ldexp. gcc/testsuite/ChangeLog: PR target/57492 * gcc.dg/tree-ssa/pow-to-ldexp.c: New test.
0001-Match-Fold-pow-calls-to-ldexp-when-possible-PR57492.patch
Description: 0001-Match-Fold-pow-calls-to-ldexp-when-possible-PR57492.patch
