2011-01-26 02:04:09 +00:00
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; RUN: llc < %s -tailcallopt -mtriple=x86_64-linux -post-RA-scheduler=true | FileCheck %s
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; RUN: llc < %s -tailcallopt -mtriple=x86_64-win32 -post-RA-scheduler=true | FileCheck %s
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; FIXME: Redundant unused stack allocation could be eliminated.
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; CHECK: subq ${{24|88}}, %rsp
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Major calling convention code refactoring.
Instead of awkwardly encoding calling-convention information with ISD::CALL,
ISD::FORMAL_ARGUMENTS, ISD::RET, and ISD::ARG_FLAGS nodes, TargetLowering
provides three virtual functions for targets to override:
LowerFormalArguments, LowerCall, and LowerRet, which replace the custom
lowering done on the special nodes. They provide the same information, but
in a more immediately usable format.
This also reworks much of the target-independent tail call logic. The
decision of whether or not to perform a tail call is now cleanly split
between target-independent portions, and the target dependent portion
in IsEligibleForTailCallOptimization.
This also synchronizes all in-tree targets, to help enable future
refactoring and feature work.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78142 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-05 01:29:28 +00:00
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2008-04-30 09:19:47 +00:00
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; Check that lowered arguments on the stack do not overwrite each other.
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Major calling convention code refactoring.
Instead of awkwardly encoding calling-convention information with ISD::CALL,
ISD::FORMAL_ARGUMENTS, ISD::RET, and ISD::ARG_FLAGS nodes, TargetLowering
provides three virtual functions for targets to override:
LowerFormalArguments, LowerCall, and LowerRet, which replace the custom
lowering done on the special nodes. They provide the same information, but
in a more immediately usable format.
This also reworks much of the target-independent tail call logic. The
decision of whether or not to perform a tail call is now cleanly split
between target-independent portions, and the target dependent portion
in IsEligibleForTailCallOptimization.
This also synchronizes all in-tree targets, to help enable future
refactoring and feature work.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78142 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-05 01:29:28 +00:00
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; Add %in1 %p1 to a different temporary register (%eax).
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2011-01-26 02:04:09 +00:00
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; CHECK: movl [[A1:32|144]](%rsp), %eax
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Major calling convention code refactoring.
Instead of awkwardly encoding calling-convention information with ISD::CALL,
ISD::FORMAL_ARGUMENTS, ISD::RET, and ISD::ARG_FLAGS nodes, TargetLowering
provides three virtual functions for targets to override:
LowerFormalArguments, LowerCall, and LowerRet, which replace the custom
lowering done on the special nodes. They provide the same information, but
in a more immediately usable format.
This also reworks much of the target-independent tail call logic. The
decision of whether or not to perform a tail call is now cleanly split
between target-independent portions, and the target dependent portion
in IsEligibleForTailCallOptimization.
This also synchronizes all in-tree targets, to help enable future
refactoring and feature work.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78142 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-05 01:29:28 +00:00
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; Move param %in1 to temp register (%r10d).
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2011-01-26 02:04:09 +00:00
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; CHECK: movl [[A2:40|152]](%rsp), %r10d
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2010-06-21 22:17:20 +00:00
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; Add %in1 %p1 to a different temporary register (%eax).
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2011-01-26 02:04:09 +00:00
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; CHECK: addl {{%edi|%ecx}}, %eax
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2009-11-13 01:01:58 +00:00
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; Move param %in2 to stack.
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2011-01-26 02:04:09 +00:00
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; CHECK: movl %r10d, [[A1]](%rsp)
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2009-11-16 23:43:42 +00:00
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; Move result of addition to stack.
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2011-01-26 02:04:09 +00:00
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; CHECK: movl %eax, [[A2]](%rsp)
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Major calling convention code refactoring.
Instead of awkwardly encoding calling-convention information with ISD::CALL,
ISD::FORMAL_ARGUMENTS, ISD::RET, and ISD::ARG_FLAGS nodes, TargetLowering
provides three virtual functions for targets to override:
LowerFormalArguments, LowerCall, and LowerRet, which replace the custom
lowering done on the special nodes. They provide the same information, but
in a more immediately usable format.
This also reworks much of the target-independent tail call logic. The
decision of whether or not to perform a tail call is now cleanly split
between target-independent portions, and the target dependent portion
in IsEligibleForTailCallOptimization.
This also synchronizes all in-tree targets, to help enable future
refactoring and feature work.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78142 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-05 01:29:28 +00:00
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; Eventually, do a TAILCALL
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; CHECK: TAILCALL
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2008-04-30 09:19:47 +00:00
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2009-10-18 19:57:27 +00:00
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declare fastcc i32 @tailcallee(i32 %p1, i32 %p2, i32 %p3, i32 %p4, i32 %p5, i32 %p6, i32 %a, i32 %b) nounwind
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2008-04-30 09:19:47 +00:00
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2009-10-18 19:57:27 +00:00
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define fastcc i32 @tailcaller(i32 %p1, i32 %p2, i32 %p3, i32 %p4, i32 %p5, i32 %p6, i32 %in1, i32 %in2) nounwind {
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2008-04-30 09:19:47 +00:00
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entry:
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%tmp = add i32 %in1, %p1
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2009-06-12 16:26:57 +00:00
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%retval = tail call fastcc i32 @tailcallee(i32 %p1, i32 %p2, i32 %p3, i32 %p4, i32 %p5, i32 %p6, i32 %in2,i32 %tmp)
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2008-04-30 09:19:47 +00:00
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ret i32 %retval
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}
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