Do folding for indirect branches, where possible

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102836 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 29 insertions, 0 deletions

diff --git a/test/CodeGen/MSP430/indirectbr2.ll b/test/CodeGen/MSP430/indirectbr2.ll
new file mode 100644
index 0000000000..93cfb2506b
--- /dev/null
+++ b/test/CodeGen/MSP430/indirectbr2.ll
@@ -0,0 +1,29 @@
+; RUN: llc -march=msp430 < %s | FileCheck %s
+@C.0.2070 = private constant [5 x i8*] [i8* blockaddress(@foo, %L1), i8* blockaddress(@foo, %L2), i8* blockaddress(@foo, %L3), i8* blockaddress(@foo, %L4), i8* blockaddress(@foo, %L5)] ; <[5 x i8*]*> [#uses=1]
+
+define internal i16 @foo(i16 %i) nounwind {
+entry:
+  %tmp1 = getelementptr inbounds [5 x i8*]* @C.0.2070, i16 0, i16 %i ; <i8**> [#uses=1]
+  %gotovar.4.0 = load i8** %tmp1, align 4        ; <i8*> [#uses=1]
+; CHECK: mov.w   .LC.0.2070(r15), pc
+  indirectbr i8* %gotovar.4.0, [label %L5, label %L4, label %L3, label %L2, label %L1]
+
+L5:                                               ; preds = %bb2
+  br label %L4
+
+L4:                                               ; preds = %L5, %bb2
+  %res.0 = phi i16 [ 385, %L5 ], [ 35, %entry ]     ; <i16> [#uses=1]
+  br label %L3
+
+L3:                                               ; preds = %L4, %bb2
+  %res.1 = phi i16 [ %res.0, %L4 ], [ 5, %entry ]   ; <i16> [#uses=1]
+  br label %L2
+
+L2:                                               ; preds = %L3, %bb2
+  %res.2 = phi i16 [ %res.1, %L3 ], [ 1, %entry ]   ; <i16> [#uses=1]
+  br label %L1
+
+L1:                                               ; preds = %L2, %bb2
+  %res.3 = phi i16 [ %res.2, %L2 ], [ 2, %entry ]  ; <i16> [#uses=1]
+  ret i16 %res.3
+}