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-rw-r--r--llvm/test/CodeGen/X86/mmx-bitcast-fold.ll12
1 files changed, 12 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/mmx-bitcast-fold.ll b/llvm/test/CodeGen/X86/mmx-bitcast-fold.ll
new file mode 100644
index 00000000000..fc7ce73a441
--- /dev/null
+++ b/llvm/test/CodeGen/X86/mmx-bitcast-fold.ll
@@ -0,0 +1,12 @@
+; RUN: opt -mtriple=x86_64-- -early-cse < %s -S | FileCheck %s
+
+; CHECK: @foo(x86_mmx bitcast (double 0.000000e+00 to x86_mmx))
+
+define void @bar() {
+entry:
+ %0 = bitcast double 0.0 to x86_mmx
+ %1 = call x86_mmx @foo(x86_mmx %0)
+ ret void
+}
+
+declare x86_mmx @foo(x86_mmx)
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