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llvm-project/llvm/test/CodeGen/X86/2009-06-15-not-a-tail-call.ll

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X86: Do not use llc -march in tests. `llc -march` is problematic because it only switches the target architecture, but leaves the operating system unchanged. This occasionally leads to indeterministic tests because the OS from LLVM_DEFAULT_TARGET_TRIPLE is used. However we can simply always use `llc -mtriple` instead. This changes all the tests to do this to avoid people using -march when they copy and paste parts of tests. See also the discussion in https://reviews.llvm.org/D35287 llvm-svn: 309774
2017-08-02 08:28:10 +08:00
; RUN: llc < %s -mtriple=i686-- -tailcallopt | not grep TAILCALL
CheckTailCallReturnConstraints is missing a check on the incomming chain of the RETURN node. The incomming chain must be the outgoing chain of the CALL node. This causes the backend to identify tail calls that are not tail calls. This patch fixes this. llvm-svn: 73387
2009-06-15 22:43:36 +08:00
; Bug 4396. This tail call can NOT be optimized.
declare fastcc i8* @_D3gcx2GC12mallocNoSyncMFmkZPv() nounwind
define fastcc i8* @_D3gcx2GC12callocNoSyncMFmkZPv() nounwind {
entry:
%tmp6 = tail call fastcc i8* @_D3gcx2GC12mallocNoSyncMFmkZPv() ; <i8*> [#uses=2]
%tmp9 = tail call i8* @memset(i8* %tmp6, i32 0, i64 2) ; <i8*> [#uses=0]
ret i8* %tmp6
}
declare i8* @memset(i8*, i32, i64)