Hexagon: Pass to replace tranfer/copy instructions into combine instruction

where possible.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181817 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 38 insertions, 6 deletions

diff --git a/test/CodeGen/Hexagon/args.ll b/test/CodeGen/Hexagon/args.ll
index f8c9e44..aea4ffe 100644
--- a/test/CodeGen/Hexagon/args.ll
+++ b/test/CodeGen/Hexagon/args.ll
@@ -1,11 +1,8 @@
 ; RUN: llc -march=hexagon -mcpu=hexagonv4 -disable-dfa-sched -disable-hexagon-misched < %s | FileCheck %s
 ; CHECK: memw(r29{{ *}}+{{ *}}#0){{ *}}={{ *}}#7
-; CHECK: r0 = #1
-; CHECK: r1 = #2
-; CHECK: r2 = #3
-; CHECK: r3 = #4
-; CHECK: r4 = #5
-; CHECK: r5 = #6
+; CHECK: r1:0 = combine(#2, #1)
+; CHECK: r3:2 = combine(#4, #3)
+; CHECK: r5:4 = combine(#6, #5)
 
 
 define void @foo() nounwind {
diff --git a/test/CodeGen/Hexagon/tfr-to-combine.ll b/test/CodeGen/Hexagon/tfr-to-combine.ll
new file mode 100644
index 0000000..e3057cd
--- /dev/null
+++ b/test/CodeGen/Hexagon/tfr-to-combine.ll
@@ -0,0 +1,35 @@
+; RUN: llc -march=hexagon -mcpu=hexagonv5  -O3 < %s | FileCheck %s
+
+; Check that we combine TFRs and TFRIs into COMBINEs.
+
+@a = external global i16
+@b = external global i16
+@c = external global i16
+
+; Function Attrs: nounwind
+define i64 @test1() #0 {
+; CHECK: combine(#10, #0)
+entry:
+  store i16 0, i16* @a, align 2
+  store i16 10, i16* @b, align 2
+  ret i64 10
+}
+
+; Function Attrs: nounwind
+define i64 @test2() #0 {
+; CHECK: combine(#0, r{{[0-9]+}})
+entry:
+  store i16 0, i16* @a, align 2
+  %0 = load i16* @c, align 2
+  %conv2 = zext i16 %0 to i64
+  ret i64 %conv2
+}
+
+; Function Attrs: nounwind
+define i64 @test4() #0 {
+; CHECK: combine(#0, ##100)
+entry:
+  store i16 100, i16* @b, align 2
+  store i16 0, i16* @a, align 2
+  ret i64 0
+}