[llvm-commits] [llvm] r95295 - in /llvm/trunk: lib/Target/X86/X86ISelLowering.cpp test/CodeGen/X86/tailcall2.ll
Evan Cheng
evan.cheng at apple.com
Wed Feb 3 22:47:24 PST 2010
Author: evancheng
Date: Thu Feb 4 00:47:24 2010
New Revision: 95295
URL: http://llvm.org/viewvc/llvm-project?rev=95295&view=rev
Log:
Re-enable x86 tail call optimization.
Modified:
llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
llvm/trunk/test/CodeGen/X86/tailcall2.ll
Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=95295&r1=95294&r2=95295&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Thu Feb 4 00:47:24 2010
@@ -52,7 +52,6 @@
STATISTIC(NumTailCalls, "Number of tail calls");
-static cl::opt<unsigned> TailCallLimit("tailcall-limit", cl::init(0));
static cl::opt<bool>
DisableMMX("disable-mmx", cl::Hidden, cl::desc("Disable use of MMX"));
@@ -2271,8 +2270,6 @@
// Look for obvious safe cases to perform tail call optimization that does not
// requite ABI changes. This is what gcc calls sibcall.
- if (NumTailCalls >= TailCallLimit)
- return false;
// Do not tail call optimize vararg calls for now.
if (isVarArg)
Modified: llvm/trunk/test/CodeGen/X86/tailcall2.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/tailcall2.ll?rev=95295&r1=95294&r2=95295&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/tailcall2.ll (original)
+++ llvm/trunk/test/CodeGen/X86/tailcall2.ll Thu Feb 4 00:47:24 2010
@@ -1,6 +1,5 @@
; RUN: llc < %s -march=x86 -asm-verbose=false | FileCheck %s -check-prefix=32
; RUN: llc < %s -march=x86-64 -asm-verbose=false | FileCheck %s -check-prefix=64
-; XFAIL: *
define void @t1(i32 %x) nounwind ssp {
entry:
@@ -107,10 +106,10 @@
define signext i16 @t8() nounwind ssp {
entry:
; 32: t8:
-; 32: jmp {{_?}}bar3
+; 32: call {{_?}}bar3
; 64: t8:
-; 64: jmp {{_?}}bar3
+; 64: callq {{_?}}bar3
%0 = tail call signext i16 @bar3() nounwind ; <i16> [#uses=1]
ret i16 %0
}
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