[Inliner] don't assume that a Constant alloca size is a ConstantInt (PR27277)

Differential Revision: http://reviews.llvm.org/D20077

llvm-svn: 268980

1 files changed, 30 insertions, 0 deletions

diff --git a/llvm/test/Transforms/Inline/alloca_test.ll b/llvm/test/Transforms/Inline/alloca_test.ll
index 1894c434131..c9d8f11cd84 100644
--- a/llvm/test/Transforms/Inline/alloca_test.ll
+++ b/llvm/test/Transforms/Inline/alloca_test.ll
@@ -1,3 +1,4 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; This test ensures that alloca instructions in the entry block for an inlined
 ; function are moved to the top of the function they are inlined into.
 ;
@@ -23,3 +24,32 @@ Entry:
   ret i32 %Y
 }
 
+; https://llvm.org/bugs/show_bug.cgi?id=27277
+; Don't assume that the size is a ConstantInt (an undef value is also a constant).
+
+define void @PR27277(i32 %p1) {
+; CHECK-LABEL: @PR27277(
+; CHECK-NEXT:    [[VLA:%.*]] = alloca double, i32 %p1
+; CHECK-NEXT:    call void @PR27277(i32 undef)
+; CHECK-NEXT:    ret void
+;
+  %vla = alloca double, i32 %p1
+  call void @PR27277(i32 undef)
+  ret void
+}
+
+; Don't assume that the size is a ConstantInt (a ConstExpr is also a constant).
+
+@GV = common global i32* null
+
+define void @PR27277_part2(i32 %p1) {
+; CHECK-LABEL: @PR27277_part2(
+; CHECK-NEXT:    [[VLA:%.*]] = alloca double, i32 %p1
+; CHECK-NEXT:    call void @PR27277_part2(i32 ptrtoint (i32** @GV to i32))
+; CHECK-NEXT:    ret void
+;
+  %vla = alloca double, i32 %p1
+  call void @PR27277_part2(i32 ptrtoint (i32** @GV to i32))
+  ret void
+}
+