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[Sparc] Disable tail call optimization for sparc64.

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This patch fixes PR17506.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192294 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Venkatraman Govindaraju 2013-10-09 12:50:39 +00:00
parent 0568ba6e3a
commit 3b73dea538
2 changed files with 43 additions and 0 deletions
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3
lib/Target/Sparc/SparcISelLowering.cpp
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@ -1035,6 +1035,9 @@ SparcTargetLowering::LowerCall_64(TargetLowering::CallLoweringInfo &CLI,
SDLoc DL = CLI.DL; SDLoc DL = CLI.DL;
SDValue Chain = CLI.Chain; SDValue Chain = CLI.Chain;
// Sparc target does not yet support tail call optimization.
CLI.IsTailCall = false;
// Analyze operands of the call, assigning locations to each operand. // Analyze operands of the call, assigning locations to each operand.
SmallVector<CCValAssign, 16> ArgLocs; SmallVector<CCValAssign, 16> ArgLocs;
CCState CCInfo(CLI.CallConv, CLI.IsVarArg, DAG.getMachineFunction(), CCState CCInfo(CLI.CallConv, CLI.IsVarArg, DAG.getMachineFunction(),

40
test/CodeGen/SPARC/2011-01-11-Call.ll
View File

@ -1,4 +1,24 @@
; RUN: llc -march=sparc -O0 <%s ; RUN: llc -march=sparc -O0 <%s
; RUN: llc -march=sparc <%s | FileCheck %s --check-prefix=V8
; RUN: llc -march=sparcv9 <%s | FileCheck %s --check-prefix=V9
; V8-LABEL: test
; V8: save %sp
; V8: call foo
; V8-NEXT: nop
; V8: call bar
; V8-NEXT: nop
; V8: jmp %i7+8
; V8-NEXT: restore
; V9-LABEL: test
; V9: save %sp
; V9: call foo
; V9-NEXT: nop
; V9: call bar
; V9-NEXT: nop
; V9: jmp %i7+8
; V9-NEXT: restore
define void @test() nounwind { define void @test() nounwind {
entry: entry:
@ -11,3 +31,23 @@ declare i32 @foo(...)
declare void @bar(...) declare void @bar(...)
; V8-LABEL: test_tail_call_with_return
; V8: save %sp
; V8: call foo
; V8-NEXT: nop
; V8: jmp %i7+8
; V8-NEXT: restore %g0, %o0, %o0
; V9-LABEL: test_tail_call_with_return
; V9: save %sp
; V9: call foo
; V9-NEXT: nop
; V9: jmp %i7+8
; V9-NEXT: restore %g0, %o0, %o0
define i32 @test_tail_call_with_return() nounwind {
entry:
%0 = tail call i32 (...)* @foo() nounwind
ret i32 %0
}