Test case for PR748

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28000 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/2006-04-27-ISelFoldingBug.ll b/test/CodeGen/X86/2006-04-27-ISelFoldingBug.ll
new file mode 100644 (file)
index 0000000..c7acd2c
--- /dev/null
+++ b/test/CodeGen/X86/2006-04-27-ISelFoldingBug.ll
@@ -0,0 +1,31 @@
+; RUN: llvm-as < %s | llc -march=x86 -relocation-model=static | grep 'movl _last' | wc -l | grep 2
+
+%block = external global ubyte*                ; <ubyte**> [#uses=1]
+%last = external global int            ; <int*> [#uses=3]
+
+implementation   ; Functions:
+
+bool %loadAndRLEsource_no_exit_2E_1_label_2E_0(int %tmp.21.reload, int %tmp.8) {
+newFuncRoot:
+       br label %label.0
+
+label.0.no_exit.1_crit_edge.exitStub:          ; preds = %label.0
+       ret bool true
+
+codeRepl5.exitStub:            ; preds = %label.0
+       ret bool false
+
+label.0:               ; preds = %newFuncRoot
+       %tmp.35 = load int* %last               ; <int> [#uses=1]
+       %inc.1 = add int %tmp.35, 1             ; <int> [#uses=2]
+       store int %inc.1, int* %last
+       %tmp.36 = load ubyte** %block           ; <ubyte*> [#uses=1]
+       %tmp.38 = getelementptr ubyte* %tmp.36, int %inc.1              ; <ubyte*> [#uses=1]
+       %tmp.40 = cast int %tmp.21.reload to ubyte              ; <ubyte> [#uses=1]
+       store ubyte %tmp.40, ubyte* %tmp.38
+       %tmp.910 = load int* %last              ; <int> [#uses=1]
+       %tmp.1111 = setlt int %tmp.910, %tmp.8          ; <bool> [#uses=1]
+       %tmp.1412 = setne int %tmp.21.reload, 257               ; <bool> [#uses=1]
+       %tmp.1613 = and bool %tmp.1111, %tmp.1412               ; <bool> [#uses=1]
+       br bool %tmp.1613, label %label.0.no_exit.1_crit_edge.exitStub, label %codeRepl5.exitStub
+}