e6c2e12c63
Optimise more branches with zero on riscv64. In particular, BLTU with zero occurs with IsInBounds checks for index zero. This currently results in two instructions and requires an additional register: li t2, 0 bltu t2, t1, 0x174b4 This is equivalent to checking if the bounds is not equal to zero. With this change: bnez t1, 0x174c0 This removes more than 500 instructions from the Go binary on riscv64. Change-Id: I6cd861d853e3ef270bd46dacecdfaa205b1c4644 Reviewed-on: https://go-review.googlesource.com/c/go/+/606715 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Meng Zhuo <mengzhuo1203@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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