FIX PR2794. Make sure SIGN_EXTEND_INREG nodes introduced by LegalizeSetCCOperands are leglized. Patch by Richard Pennington.

llvm-svn: 57460

1 files changed, 29 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/Mips/2008-10-13-LegalizerBug.ll b/llvm/test/CodeGen/Mips/2008-10-13-LegalizerBug.ll
new file mode 100644
index 00000000000..783850a7827
--- /dev/null
+++ b/llvm/test/CodeGen/Mips/2008-10-13-LegalizerBug.ll
@@ -0,0 +1,29 @@
+; RUN: llvm-as < %s | llc -march=mips
+; PR2794
+
+define i32 @main(i8*) nounwind {
+entry:
+        br label %continue.outer
+
+continue.outer:         ; preds = %case4, %entry
+        %p.0.ph.rec = phi i32 [ 0, %entry ], [ %indvar.next, %case4 ]          ; <i32> [#uses=2]
+        %p.0.ph = getelementptr i8* %0, i32 %p.0.ph.rec         ; <i8*> [#uses=1]
+        %1 = load i8* %p.0.ph           ; <i8> [#uses=1]
+        switch i8 %1, label %infloop [
+                i8 0, label %return.split
+                i8 76, label %case4
+                i8 108, label %case4
+                i8 104, label %case4
+                i8 42, label %case4
+        ]
+
+case4:          ; preds = %continue.outer, %continue.outer, %continue.outer, %continue.outer
+        %indvar.next = add i32 %p.0.ph.rec, 1           ; <i32> [#uses=1]
+        br label %continue.outer
+
+return.split:           ; preds = %continue.outer
+        ret i32 0
+
+infloop:                ; preds = %infloop, %continue.outer
+        br label %infloop
+}