From: Alkis Evlogimenos <alkis@evlogimenos.com>
Date: Mon, 12 Apr 2004 15:40:25 +0000 (+0000)
Subject: Add same value coalescing testcase
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d1862af3148ad9a6e7c0252b597018b6a3d479b8;p=oota-llvm.git

Add same value coalescing testcase


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12865 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/test/CodeGen/X86/2004-04-09-SameValueCoalescing.llx b/test/CodeGen/X86/2004-04-09-SameValueCoalescing.llx
new file mode 100644
index 00000000000..70ebc2349d3
--- /dev/null
+++ b/test/CodeGen/X86/2004-04-09-SameValueCoalescing.llx
@@ -0,0 +1,19 @@
+; Linear scan does not currently coalesce any two variables that have
+; overlapping live intervals. When two overlapping intervals have the same
+; value, they can be joined though.
+;
+; RUN: llvm-as < %s | llc -march=x86 -regalloc=linearscan | not grep 'mov %[A-Z]\{2,3\}, %[A-Z]\{2,3\}'
+
+int %main() {
+        %ptr = alloca uint
+        br label %Loop
+Loop:
+        %I = phi int [0, %0], [%i2, %Loop]
+        %i2 = add int %I, 1
+        %i3 = cast int %i2 to uint
+        store uint %i3, uint* %ptr
+        %C = seteq int %i2, 10
+        br bool %C, label %Out, label %Loop
+Out:
+        ret int 0
+}