Fix PR2835. Do not change the width of a volatile load.
llvm-svn: 56792
diff --git a/llvm/test/CodeGen/X86/2008-09-29-VolatileBug.ll b/llvm/test/CodeGen/X86/2008-09-29-VolatileBug.ll
new file mode 100644
index 0000000..4f6eb59
--- /dev/null
+++ b/llvm/test/CodeGen/X86/2008-09-29-VolatileBug.ll
@@ -0,0 +1,15 @@
+; RUN: llvm-as < %s | llc -march=x86 | not grep movz
+; PR2835
+
+@g_407 = internal global i32 0 ; <i32*> [#uses=1]
+@llvm.used = appending global [1 x i8*] [ i8* bitcast (i32 ()* @main to i8*) ], section "llvm.metadata" ; <[1 x i8*]*> [#uses=0]
+
+define i32 @main() nounwind {
+entry:
+ %0 = volatile load i32* @g_407, align 4 ; <i32> [#uses=1]
+ %1 = trunc i32 %0 to i8 ; <i8> [#uses=1]
+ %2 = tail call i32 @func_45(i8 zeroext %1) nounwind ; <i32> [#uses=0]
+ ret i32 0
+}
+
+declare i32 @func_45(i8 zeroext) nounwind