diff options
Diffstat (limited to 'test/Transforms/GVN/malloc-load-removal.ll')
| -rw-r--r-- | test/Transforms/GVN/malloc-load-removal.ll | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/test/Transforms/GVN/malloc-load-removal.ll b/test/Transforms/GVN/malloc-load-removal.ll new file mode 100644 index 0000000000..66b6929d30 --- /dev/null +++ b/test/Transforms/GVN/malloc-load-removal.ll @@ -0,0 +1,31 @@ +; RUN: opt -S -basicaa -gvn < %s | FileCheck %s +; RUN: opt -S -basicaa -gvn -disable-simplify-libcalls < %s | FileCheck %s -check-prefix=CHECK_NO_LIBCALLS +; PR13694 + +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" +target triple = "x86_64-apple-macosx10.8.0" + +declare i8* @malloc(i64) nounwind + +define noalias i8* @test() nounwind uwtable ssp { +entry: + %call = tail call i8* @malloc(i64 100) nounwind + %0 = load i8* %call, align 1 + %tobool = icmp eq i8 %0, 0 + br i1 %tobool, label %if.end, label %if.then + +if.then: ; preds = %entry + store i8 0, i8* %call, align 1 + br label %if.end + +if.end: ; preds = %if.then, %entry + ret i8* %call + +; CHECK: @test +; CHECK-NOT: load +; CHECK-NOT: icmp + +; CHECK_NO_LIBCALLS: @test +; CHECK_NO_LIBCALLS: load +; CHECK_NO_LIBCALLS: icmp +} |