From 59d6cff90eecf31cb3dd860c4e786674cfdd42eb Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Mon, 10 Jun 2013 20:36:52 +0000
Subject: Vendor import of llvm tags/RELEASE_33/final r183502 (effectively, 3.3
 release): http://llvm.org/svn/llvm-project/llvm/tags/RELEASE_33/final@183502

---
 test/CodeGen/X86/codegen-prepare.ll | 44 +++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 test/CodeGen/X86/codegen-prepare.ll

(limited to 'test/CodeGen/X86/codegen-prepare.ll')

diff --git a/test/CodeGen/X86/codegen-prepare.ll b/test/CodeGen/X86/codegen-prepare.ll
new file mode 100644
index 000000000000..e8ee07063531
--- /dev/null
+++ b/test/CodeGen/X86/codegen-prepare.ll
@@ -0,0 +1,44 @@
+; RUN: llc < %s -mtriple=x86_64-pc-linux | FileCheck %s
+
+; Check that the CodeGenPrepare Pass
+; does not wrongly rewrite the address computed by Instruction %4
+; as [12 + Base:%this].
+
+; This test makes sure that:
+; - both the store and the first load instructions
+;   within basic block labeled 'if.then' are not removed. 
+; - the store instruction stores a value at address [60 + %this]
+; - the first load instruction loads a value at address [12 + %this]
+
+%class.A = type { %struct.B }
+%struct.B = type { %class.C, %class.D, %class.C, %class.D }
+%class.C = type { float, float, float }
+%class.D = type { [3 x %class.C] }
+
+define linkonce_odr void @foo(%class.A* nocapture %this, i32 %BoolValue) nounwind uwtable {
+entry:
+  %cmp = icmp eq i32 %BoolValue, 0
+  %address1 = getelementptr inbounds %class.A* %this, i64 0, i32 0, i32 3
+  %address2 = getelementptr inbounds %class.A* %this, i64 0, i32 0, i32 1
+  br i1 %cmp, label %if.else, label %if.then
+
+if.then:                                         ; preds = %entry
+  %0 = getelementptr inbounds %class.D* %address2, i64 0, i32 0, i64 0, i32 0
+  %1 = load float* %0, align 4 
+  %2 = getelementptr inbounds float* %0, i64 3
+  %3 = load float* %2, align 4 
+  %4 = getelementptr inbounds %class.D* %address1, i64 0, i32 0, i64 0, i32 0
+  store float %1, float* %4, align 4
+  br label %if.end
+
+if.else:                                          ; preds = %entry
+  br label %if.end
+
+if.end:                                           ; preds = %if.then, %if.else, %entry
+  ret void
+}
+
+; CHECK: foo:
+; CHECK: movss 12([[THIS:%[a-zA-Z0-9]+]]), [[REGISTER:%[a-zA-Z0-9]+]]
+; CHECK-NEXT: movss [[REGISTER]], 60([[THIS]])
+
-- 
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