diff options
Diffstat (limited to 'test/Transforms/CodeGenPrepare/crash-on-large-allocas.ll')
| -rw-r--r-- | test/Transforms/CodeGenPrepare/crash-on-large-allocas.ll | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/test/Transforms/CodeGenPrepare/crash-on-large-allocas.ll b/test/Transforms/CodeGenPrepare/crash-on-large-allocas.ll new file mode 100644 index 0000000000000..3808c0e61c10a --- /dev/null +++ b/test/Transforms/CodeGenPrepare/crash-on-large-allocas.ll @@ -0,0 +1,16 @@ +; RUN: opt -S -codegenprepare %s -o - | FileCheck %s +; +; Ensure that we don't {crash,return a bad value} when given an alloca larger +; than what a pointer can represent. + +target datalayout = "p:16:16" + +; CHECK-LABEL: @alloca_overflow_is_unknown( +define i16 @alloca_overflow_is_unknown() { + %i = alloca i8, i32 65537 + %j = call i16 @llvm.objectsize.i16.p0i8(i8* %i, i1 false, i1 false) + ; CHECK: ret i16 -1 + ret i16 %j +} + +declare i16 @llvm.objectsize.i16.p0i8(i8*, i1, i1) |