Account for 128-bit integer operations in PPCCTRLoops

We need to abort the formation of counter-register-based loops where there are
128-bit integer operations that might become function calls.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202192 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 31 insertions, 0 deletions

diff --git a/test/CodeGen/PowerPC/ctrloop-udivti3.ll b/test/CodeGen/PowerPC/ctrloop-udivti3.ll
new file mode 100644
index 0000000000..d07a11fe60
--- /dev/null
+++ b/test/CodeGen/PowerPC/ctrloop-udivti3.ll
@@ -0,0 +1,31 @@
+; RUN: llc < %s -march=ppc64 | FileCheck %s
+target datalayout = "E-m:e-i64:64-n32:64"
+target triple = "powerpc64-unknown-linux-gnu"
+
+; Function Attrs: nounwind
+define hidden void @_mpd_shortdiv(i64 %n) #0 {
+entry:
+  br i1 undef, label %for.end, label %for.body.lr.ph
+
+for.body.lr.ph:                                   ; preds = %entry
+  br label %for.body
+
+for.body:                                         ; preds = %for.body, %for.body.lr.ph
+  %i.018.in = phi i64 [ %n, %for.body.lr.ph ], [ %i.018, %for.body ]
+  %i.018 = add i64 %i.018.in, -1
+  %add.i = or i128 undef, undef
+  %div.i = udiv i128 %add.i, 0
+  %conv3.i11 = trunc i128 %div.i to i64
+  store i64 %conv3.i11, i64* undef, align 8
+  %cmp = icmp eq i64 %i.018, 0
+  br i1 %cmp, label %for.end, label %for.body
+
+for.end:                                          ; preds = %for.body, %entry
+  ret void
+}
+
+; CHECK-LABEL: @_mpd_shortdiv
+; CHECK-NOT: mtctr
+
+attributes #0 = { nounwind }
+