[Hexagon] Generate more hardware loops
Refactored parts of the hardware loop pass to generate
more. Also, added more tests.
Differential Revision: http://reviews.llvm.org/D9568
llvm-svn: 236896
diff --git a/llvm/test/CodeGen/Hexagon/hwloop3.ll b/llvm/test/CodeGen/Hexagon/hwloop3.ll
new file mode 100644
index 0000000..1135e06
--- /dev/null
+++ b/llvm/test/CodeGen/Hexagon/hwloop3.ll
@@ -0,0 +1,27 @@
+; RUN: llc -march=hexagon < %s | FileCheck %s
+;
+; Remove the unconditional jump to following instruction.
+
+; CHECK: endloop0
+; CHECK-NOT: jump [[L1:.]]
+; CHECK-NOT: [[L1]]
+
+define void @test(i32* nocapture %a, i32 %n) nounwind {
+entry:
+ br label %for.body
+
+for.body:
+ %arrayidx.phi = phi i32* [ %a, %entry ], [ %arrayidx.inc, %for.body ]
+ %i.02 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
+ %0 = load i32, i32* %arrayidx.phi, align 4
+ %add = add nsw i32 %0, 1
+ store i32 %add, i32* %arrayidx.phi, align 4
+ %inc = add nsw i32 %i.02, 1
+ %exitcond = icmp eq i32 %inc, 100
+ %arrayidx.inc = getelementptr i32, i32* %arrayidx.phi, i32 1
+ br i1 %exitcond, label %for.end, label %for.body
+
+for.end:
+ ret void
+}
+