diff options
Diffstat (limited to 'test/CodeGen/ARM64/ands-bad-peephole.ll')
-rw-r--r-- | test/CodeGen/ARM64/ands-bad-peephole.ll | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/test/CodeGen/ARM64/ands-bad-peephole.ll b/test/CodeGen/ARM64/ands-bad-peephole.ll new file mode 100644 index 0000000000..34d6287b8b --- /dev/null +++ b/test/CodeGen/ARM64/ands-bad-peephole.ll @@ -0,0 +1,31 @@ +; RUN: llc %s -o - | FileCheck %s +; Check that ANDS (tst) is not merged with ADD when the immediate +; is not 0. +; <rdar://problem/16693089> +target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128" +target triple = "arm64-apple-ios" + +; CHECK-LABEL: tst1: +; CHECK: add [[REG:w[0-9]+]], w{{[0-9]+}}, #1 +; CHECK: tst [[REG]], #0x1 +define void @tst1() { +entry: + br i1 undef, label %for.end, label %for.body + +for.body: ; preds = %for.body, %entry + %result.09 = phi i32 [ %add2.result.0, %for.body ], [ 1, %entry ] + %i.08 = phi i32 [ %inc, %for.body ], [ 2, %entry ] + %and = and i32 %i.08, 1 + %cmp1 = icmp eq i32 %and, 0 + %add2.result.0 = select i1 %cmp1, i32 undef, i32 %result.09 + %inc = add nsw i32 %i.08, 1 + %cmp = icmp slt i32 %i.08, undef + br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge + +for.cond.for.end_crit_edge: ; preds = %for.body + %add2.result.0.lcssa = phi i32 [ %add2.result.0, %for.body ] + br label %for.end + +for.end: ; preds = %for.cond.for.end_crit_edge, %entry + ret void +} |