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b17124553d
even when -tailcallopt is not specified and it does not require changing ABI. First case is the most trivial one. Perform tail call optimization when both the caller and callee do not return values and when the callee does not take any input arguments. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94664 91177308-0d34-0410-b5e6-96231b3b80d8
38 lines
893 B
LLVM
38 lines
893 B
LLVM
; RUN: llc < %s -march=x86 -tailcallopt | grep TAILCALL | count 5
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declare fastcc i32 @tailcallee(i32 %a1, i32 %a2, i32 %a3, i32 %a4)
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define fastcc i32 @tailcaller(i32 %in1, i32 %in2) nounwind {
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entry:
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%tmp11 = tail call fastcc i32 @tailcallee(i32 %in1, i32 %in2, i32 %in1, i32 %in2)
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ret i32 %tmp11
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}
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declare fastcc i8* @alias_callee()
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define fastcc noalias i8* @noalias_caller() nounwind {
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%p = tail call fastcc i8* @alias_callee()
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ret i8* %p
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}
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declare fastcc noalias i8* @noalias_callee()
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define fastcc i8* @alias_caller() nounwind {
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%p = tail call fastcc noalias i8* @noalias_callee()
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ret i8* %p
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}
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declare fastcc i32 @i32_callee()
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define fastcc i32 @ret_undef() nounwind {
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%p = tail call fastcc i32 @i32_callee()
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ret i32 undef
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}
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declare fastcc void @does_not_return()
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define fastcc i32 @noret() nounwind {
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tail call fastcc void @does_not_return()
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unreachable
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}
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