Add some dummy support for post-incremented loads

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86385 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 25 insertions, 0 deletions

diff --git a/test/CodeGen/MSP430/postinc.ll b/test/CodeGen/MSP430/postinc.ll
new file mode 100644
index 0000000..424b4f7
--- /dev/null
+++ b/test/CodeGen/MSP430/postinc.ll
@@ -0,0 +1,25 @@
+; RUN: llc < %s | FileCheck %s
+target datalayout = "e-p:16:8:8-i8:8:8-i16:8:8-i32:8:8"
+target triple = "msp430"
+
+define zeroext i16 @add(i16* nocapture %a, i16 zeroext %n) nounwind readonly {
+entry:
+  %cmp8 = icmp eq i16 %n, 0                       ; <i1> [#uses=1]
+  br i1 %cmp8, label %for.end, label %for.body
+
+for.body:                                         ; preds = %for.body, %entry
+  %i.010 = phi i16 [ 0, %entry ], [ %inc, %for.body ] ; <i16> [#uses=2]
+  %sum.09 = phi i16 [ 0, %entry ], [ %add, %for.body ] ; <i16> [#uses=1]
+  %arrayidx = getelementptr i16* %a, i16 %i.010   ; <i16*> [#uses=1]
+; CHECK: add:
+; CHECK: mov.w @r15+, r11
+  %tmp4 = load i16* %arrayidx                     ; <i16> [#uses=1]
+  %add = add i16 %tmp4, %sum.09                   ; <i16> [#uses=2]
+  %inc = add i16 %i.010, 1                        ; <i16> [#uses=2]
+  %exitcond = icmp eq i16 %inc, %n                ; <i1> [#uses=1]
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:                                          ; preds = %for.body, %entry
+  %sum.0.lcssa = phi i16 [ 0, %entry ], [ %add, %for.body ] ; <i16> [#uses=1]
+  ret i16 %sum.0.lcssa
+}