From 772af92cb16a5e11bd580f576643a6268e8a5bce Mon Sep 17 00:00:00 2001 From: Bob Wilson Date: Fri, 3 Aug 2012 21:26:18 +0000 Subject: Fix memcmp code-gen to honor -fno-builtin. I noticed that SelectionDAGBuilder::visitCall was missing a check for memcmp in TargetLibraryInfo, so that it would use custom code for memcmp calls even with -fno-builtin. I also had to add a new -disable-simplify-libcalls option to llc so that I could write a test for this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161262 91177308-0d34-0410-b5e6-96231b3b80d8 --- tools/llc/llc.cpp | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'tools/llc') diff --git a/tools/llc/llc.cpp b/tools/llc/llc.cpp index 004763f19f..8951050c07 100644 --- a/tools/llc/llc.cpp +++ b/tools/llc/llc.cpp @@ -35,6 +35,7 @@ #include "llvm/Support/TargetRegistry.h" #include "llvm/Support/TargetSelect.h" #include "llvm/Target/TargetData.h" +#include "llvm/Target/TargetLibraryInfo.h" #include "llvm/Target/TargetMachine.h" #include using namespace llvm; @@ -213,6 +214,11 @@ DontPlaceZerosInBSS("nozero-initialized-in-bss", cl::desc("Don't place zero-initialized symbols into bss section"), cl::init(false)); +static cl::opt +DisableSimplifyLibCalls("disable-simplify-libcalls", + cl::desc("Disable simplify-libcalls"), + cl::init(false)); + static cl::opt EnableGuaranteedTailCallOpt("tailcallopt", cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."), @@ -487,6 +493,12 @@ int main(int argc, char **argv) { // Build up all of the passes that we want to do to the module. PassManager PM; + // Add an appropriate TargetLibraryInfo pass for the module's triple. + TargetLibraryInfo *TLI = new TargetLibraryInfo(TheTriple); + if (DisableSimplifyLibCalls) + TLI->disableAllFunctions(); + PM.add(TLI); + // Add the target data from the target machine, if it exists, or the module. if (const TargetData *TD = Target.getTargetData()) PM.add(new TargetData(*TD)); -- cgit v1.2.3