1 files changed, 49 insertions, 0 deletions
diff --git a/test/Transforms/GVN/pre-gep-load.ll b/test/Transforms/GVN/pre-gep-load.ll
new file mode 100644
index 0000000..3ee3a37
--- /dev/null
+++ b/test/Transforms/GVN/pre-gep-load.ll
@@ -0,0 +1,49 @@
+; RUN: opt < %s -basicaa -gvn -enable-load-pre -S | FileCheck %s
+target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
+target triple = "aarch64--linux-gnu"
+
+define double @foo(i32 %stat, i32 %i, double** %p) {
+; CHECK-LABEL: @foo(
+entry:
+  switch i32 %stat, label %sw.default [
+    i32 0, label %sw.bb
+    i32 1, label %sw.bb
+    i32 2, label %sw.bb2
+  ]
+
+sw.bb:                                            ; preds = %entry, %entry
+  %idxprom = sext i32 %i to i64
+  %arrayidx = getelementptr inbounds double** %p, i64 0
+  %0 = load double** %arrayidx, align 8
+  %arrayidx1 = getelementptr inbounds double* %0, i64 %idxprom
+  %1 = load double* %arrayidx1, align 8
+  %sub = fsub double %1, 1.000000e+00
+  %cmp = fcmp olt double %sub, 0.000000e+00
+  br i1 %cmp, label %if.then, label %if.end
+
+if.then:                                          ; preds = %sw.bb
+  br label %return
+
+if.end:                                           ; preds = %sw.bb
+  br label %sw.bb2
+
+sw.bb2:                                           ; preds = %if.end, %entry
+  %idxprom3 = sext i32 %i to i64
+  %arrayidx4 = getelementptr inbounds double** %p, i64 0
+  %2 = load double** %arrayidx4, align 8
+  %arrayidx5 = getelementptr inbounds double* %2, i64 %idxprom3
+  %3 = load double* %arrayidx5, align 8
+; CHECK: sw.bb2:
+; CHECK-NEXT-NOT: sext
+; CHECK-NEXT: phi double [
+; CHECK-NOT: load
+  %sub6 = fsub double 3.000000e+00, %3
+  br label %return
+
+sw.default:                                       ; preds = %entry
+  br label %return
+
+return:                                           ; preds = %sw.default, %sw.bb2, %if.then
+  %retval.0 = phi double [ 0.000000e+00, %sw.default ], [ %sub6, %sw.bb2 ], [ %sub, %if.then ]
+  ret double %retval.0
+}