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| author | Nuno Lopes <nunoplopes@sapo.pt> | 2012-06-28 22:30:12 +0000 |
|---|---|---|
| committer | Nuno Lopes <nunoplopes@sapo.pt> | 2012-06-28 22:30:12 +0000 |
| commit | 85b408991aff28ffa4e9e113a5a8a35b0db505c2 (patch) | |
| tree | cc14c26f463a1c1a00bcb2c6a9cbed3235a2a591 /test/CodeGen/Generic | |
| parent | 926dc168c893e1848a18e45fd78f9b99d6f4cd5d (diff) | |
| download | external_llvm-85b408991aff28ffa4e9e113a5a8a35b0db505c2.zip external_llvm-85b408991aff28ffa4e9e113a5a8a35b0db505c2.tar.gz external_llvm-85b408991aff28ffa4e9e113a5a8a35b0db505c2.tar.bz2 | |
add a new @llvm.donothing intrinsic that, well, does nothing, and teach CodeGen to ignore calls to it
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159383 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/Generic')
| -rw-r--r-- | test/CodeGen/Generic/donothing.ll | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/test/CodeGen/Generic/donothing.ll b/test/CodeGen/Generic/donothing.ll new file mode 100644 index 0000000..d6ba138 --- /dev/null +++ b/test/CodeGen/Generic/donothing.ll @@ -0,0 +1,31 @@ +; RUN: llc < %s | FileCheck %s + +declare i32 @__gxx_personality_v0(...) +declare void @__cxa_call_unexpected(i8*) +declare void @llvm.donothing() readnone + +; CHECK: f1 +define void @f1() nounwind uwtable ssp { +entry: +; CHECK-NOT donothing + invoke void @llvm.donothing() + to label %invoke.cont unwind label %lpad + +invoke.cont: + ret void + +lpad: + %0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) + filter [0 x i8*] zeroinitializer + %1 = extractvalue { i8*, i32 } %0, 0 + tail call void @__cxa_call_unexpected(i8* %1) noreturn nounwind + unreachable +} + +; CHECK: f2 +define void @f2() nounwind { +entry: +; CHECK-NOT donothing + call void @llvm.donothing() + ret void +} |