mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-22 23:31:32 +00:00
7b837d8c75
This adds a second implementation of the AArch64 architecture to LLVM, accessible in parallel via the "arm64" triple. The plan over the coming weeks & months is to merge the two into a single backend, during which time thorough code review should naturally occur. Everything will be easier with the target in-tree though, hence this commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205090 91177308-0d34-0410-b5e6-96231b3b80d8
18 lines
409 B
LLVM
18 lines
409 B
LLVM
; RUN: llc < %s -march=arm64 | FileCheck %s
|
|
|
|
; Optimize (x > -1) to (x >= 0) etc.
|
|
; Optimize (cmp (add / sub), 0): eliminate the subs used to update flag
|
|
; for comparison only
|
|
; rdar://10233472
|
|
|
|
define i32 @t1(i64 %a) nounwind ssp {
|
|
entry:
|
|
; CHECK-LABEL: t1:
|
|
; CHECK-NOT: movn
|
|
; CHECK: cmp x0, #0
|
|
; CHECK: csinc w0, wzr, wzr, lt
|
|
%cmp = icmp sgt i64 %a, -1
|
|
%conv = zext i1 %cmp to i32
|
|
ret i32 %conv
|
|
}
|