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Diffstat (limited to 'test/Transforms/DeadArgElim/2008-06-23-DeadAfterLive.ll')
-rw-r--r-- | test/Transforms/DeadArgElim/2008-06-23-DeadAfterLive.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/test/Transforms/DeadArgElim/2008-06-23-DeadAfterLive.ll b/test/Transforms/DeadArgElim/2008-06-23-DeadAfterLive.ll new file mode 100644 index 0000000..adfd019 --- /dev/null +++ b/test/Transforms/DeadArgElim/2008-06-23-DeadAfterLive.ll @@ -0,0 +1,23 @@ +; RUN: opt < %s -deadargelim -die -S > %t +; RUN: cat %t | grep 123 + +; This test tries to catch wrongful removal of return values for a specific case +; that was break llvm-gcc builds. + +; This function has a live return value, it is used by @alive. +define internal i32 @test5() { + ret i32 123 +} + +; This function doesn't use the return value @test5 and tries to lure DAE into +; marking @test5's return value dead because only this call is unused. +define i32 @dead() { + %DEAD = call i32 @test5() + ret i32 0 +} + +; This function ensures the retval of @test5 is live. +define i32 @alive() { + %LIVE = call i32 @test5() + ret i32 %LIVE +} |