It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Integer/2007-01-19-TruncSext.ll b/test/Integer/2007-01-19-TruncSext.ll
new file mode 100644
index 0000000..3fee6bc
--- /dev/null
+++ b/test/Integer/2007-01-19-TruncSext.ll
@@ -0,0 +1,29 @@
+; RUN: llvm-as %s -o - | llvm-dis > %t1.ll
+; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
+; RUN: diff %t1.ll %t2.ll
+; RUN: llvm-as < %s | lli --force-interpreter=true | grep -- -255
+
+@ARRAY = global [ 20 x i17 ] zeroinitializer
+@FORMAT = constant [ 4 x i8 ] c"%d\0A\00"
+
+declare i32 @printf(i8* %format, ...)
+
+define void @multiply(i32 %index, i32 %X, i32 %Y) {
+ %Z = mul i32 %X, %Y
+ %P = getelementptr [20 x i17]* @ARRAY, i32 0, i32 %index
+ %Result = trunc i32 %Z to i17
+ store i17 %Result, i17* %P
+ ret void
+}
+
+define i32 @main(i32 %argc, i8** %argv) {
+ %i = bitcast i32 0 to i32
+ call void @multiply(i32 %i, i32 -1, i32 255)
+ %P = getelementptr [20 x i17]* @ARRAY, i32 0, i32 0
+ %X = load i17* %P
+ %result = sext i17 %X to i32
+ %fmt = getelementptr [4 x i8]* @FORMAT, i32 0, i32 0
+ call i32 (i8*,...)* @printf(i8* %fmt, i32 %result)
+ ret i32 0
+}
+