[ArgPromotion] Add a testcase for PR32917

mstorsjo · mstorsjo · commit 2b0fae877eed · 2017-05-05T08:40:24.000Z
Differential Revision: https://reviews.llvm.org/D32882 llvm-svn: 302216
diff --git a/llvm/test/Transforms/ArgumentPromotion/pr32917.ll b/llvm/test/Transforms/ArgumentPromotion/pr32917.ll
@@ -0,0 +1,23 @@
+; RUN: opt < %s -argpromotion -S | FileCheck %s
+; PR 32917
+
+@b = common local_unnamed_addr global i32 0, align 4
+@a = common local_unnamed_addr global i32 0, align 4
+
+define i32 @fn2() local_unnamed_addr {
+  %1 = load i32, i32* @b, align 4
+  %2 = sext i32 %1 to i64
+  %3 = inttoptr i64 %2 to i32*
+  call fastcc void @fn1(i32* %3)
+  ret i32 undef
+}
+
+define internal fastcc void @fn1(i32* nocapture readonly) unnamed_addr {
+  %2 = getelementptr inbounds i32, i32* %0, i64 -1
+  %3 = load i32, i32* %2, align 4
+  store i32 %3, i32* @a, align 4
+  ret void
+}
+
+; CHECK: getelementptr {{.*}} -1
+; CHECK-NOT: getelementptr {{.*}} 4294967295
