Move test from r207969 to another folder and rename it.

llvm-svn: 207984

1 files changed, 25 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/X86/constant-hoisting-shift-immediate.ll b/llvm/test/CodeGen/X86/constant-hoisting-shift-immediate.ll
new file mode 100644
index 00000000000..883be355bd3
--- /dev/null
+++ b/llvm/test/CodeGen/X86/constant-hoisting-shift-immediate.ll
@@ -0,0 +1,25 @@
+; RUN: llc < %s -O3 -march=x86-64 |FileCheck %s
+define i64 @foo(i1 %z, i192* %p, i192* %q)
+{
+; If const 128 is hoisted to a variable, then in basic block L_val2 we would
+; have %lshr2 = lshr i192 %data2, %const, and the definition of %const would
+; be in another basic block. As a result, a very inefficient code might be
+; produced. Here we check that this doesn't occur.
+entry:
+  %data1 = load i192* %p, align 8
+  %lshr1 = lshr i192 %data1, 128
+  %val1  = trunc i192 %lshr1 to i64
+  br i1 %z, label %End, label %L_val2
+
+; CHECK: movq    16(%rdx), %rax
+; CHECK-NEXT: retq
+L_val2:
+  %data2 = load i192* %q, align 8
+  %lshr2 = lshr i192 %data2, 128
+  %val2  = trunc i192 %lshr2 to i64
+  br label %End
+
+End:
+  %p1 = phi i64 [%val1,%entry], [%val2,%L_val2]
+  ret i64 %p1
+}