diff options
Diffstat (limited to 'test/CodeGen/AArch64/arm64-icmp-opt.ll')
| -rw-r--r-- | test/CodeGen/AArch64/arm64-icmp-opt.ll | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/test/CodeGen/AArch64/arm64-icmp-opt.ll b/test/CodeGen/AArch64/arm64-icmp-opt.ll new file mode 100644 index 0000000000..7b12ed7486 --- /dev/null +++ b/test/CodeGen/AArch64/arm64-icmp-opt.ll @@ -0,0 +1,17 @@ +; 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: cset w0, ge + %cmp = icmp sgt i64 %a, -1 + %conv = zext i1 %cmp to i32 + ret i32 %conv +} |