Add a major missing piece to the new SROA pass: aggressive splitting of

[oota-llvm.git] / test / Transforms / SROA / fca.ll

diff --git a/test/Transforms/SROA/fca.ll b/test/Transforms/SROA/fca.ll
new file mode 100644 (file)
index 0000000..6ddaed2
--- /dev/null
+++ b/test/Transforms/SROA/fca.ll
@@ -0,0 +1,49 @@
+; RUN: opt < %s -sroa -S | FileCheck %s
+; RUN: opt < %s -sroa -force-ssa-updater -S | FileCheck %s
+target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n8:16:32:64"
+
+define { i32, i32 } @test0(i32 %x, i32 %y) {
+; CHECK: @test0
+; CHECK-NOT: alloca
+; CHECK: insertvalue { i32, i32 }
+; CHECK: insertvalue { i32, i32 }
+; CHECK: ret { i32, i32 }
+
+entry:
+  %a = alloca { i32, i32 }
+
+  store { i32, i32 } undef, { i32, i32 }* %a
+
+  %gep1 = getelementptr inbounds { i32, i32 }* %a, i32 0, i32 0
+  store i32 %x, i32* %gep1
+  %gep2 = getelementptr inbounds { i32, i32 }* %a, i32 0, i32 1
+  store i32 %y, i32* %gep2
+
+  %result = load { i32, i32 }* %a
+  ret { i32, i32 } %result
+}
+
+define { i32, i32 } @test1(i32 %x, i32 %y) {
+; FIXME: This may be too conservative. Duncan argues that we are allowed to
+; split the volatile load and store here but must produce volatile scalar loads
+; and stores from them.
+; CHECK: @test1
+; CHECK: alloca
+; CHECK: alloca
+; CHECK: load volatile { i32, i32 }*
+; CHECK: store volatile { i32, i32 }
+; CHECK: ret { i32, i32 }
+
+entry:
+  %a = alloca { i32, i32 }
+  %b = alloca { i32, i32 }
+
+  %gep1 = getelementptr inbounds { i32, i32 }* %a, i32 0, i32 0
+  store i32 %x, i32* %gep1
+  %gep2 = getelementptr inbounds { i32, i32 }* %a, i32 0, i32 1
+  store i32 %y, i32* %gep2
+
+  %result = load volatile { i32, i32 }* %a
+  store volatile { i32, i32 } %result, { i32, i32 }* %b
+  ret { i32, i32 } %result
+}