[llvm] r322223 - TargetLoweringBase: The ios simulator has no bzero function.

[Matthias Braun via llvm-commits]

Author: matze
Date: Wed Jan 10 12:49:57 2018
New Revision: 322223

URL: http://llvm.org/viewvc/llvm-project?rev=322223&view=rev
Log:
TargetLoweringBase: The ios simulator has no bzero function.

Make sure I really get back to the beahvior before my rewrite in r321035
which turned out not to be completely NFC as I changed the behavior for
the ios simulator environment.

Modified:
    llvm/trunk/lib/CodeGen/TargetLoweringBase.cpp
    llvm/trunk/test/CodeGen/X86/darwin-bzero.ll

Modified: llvm/trunk/lib/CodeGen/TargetLoweringBase.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/TargetLoweringBase.cpp?rev=322223&r1=322222&r2=322223&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/TargetLoweringBase.cpp (original)
+++ llvm/trunk/lib/CodeGen/TargetLoweringBase.cpp Wed Jan 10 12:49:57 2018
@@ -132,9 +132,18 @@ void TargetLoweringBase::InitLibcalls(co
     setLibcallName(RTLIB::FPEXT_F16_F32, "__extendhfsf2");
     setLibcallName(RTLIB::FPROUND_F32_F16, "__truncsfhf2");
 
-    // Darwin 10 and higher has an optimized __bzero.
-    if (!TT.isMacOSX() || !TT.isMacOSXVersionLT(10, 6) || TT.isArch64Bit()) {
-      setLibcallName(RTLIB::BZERO, TT.isAArch64() ? "bzero" : "__bzero");
+    // Some darwins have an optimized __bzero/bzero function.
+    switch (TT.getArch()) {
+    case Triple::x86:
+    case Triple::x86_64:
+      if (TT.isMacOSX() && !TT.isMacOSXVersionLT(10, 6))
+        setLibcallName(RTLIB::BZERO, "__bzero");
+      break;
+    case Triple::aarch64:
+      setLibcallName(RTLIB::BZERO, "bzero");
+      break;
+    default:
+      break;
     }
 
     if (darwinHasSinCos(TT)) {

Modified: llvm/trunk/test/CodeGen/X86/darwin-bzero.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/darwin-bzero.ll?rev=322223&r1=322222&r2=322223&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/darwin-bzero.ll (original)
+++ llvm/trunk/test/CodeGen/X86/darwin-bzero.ll Wed Jan 10 12:49:57 2018
@@ -1,10 +1,13 @@
-; RUN: llc < %s -mtriple=i386-apple-darwin10 | FileCheck %s
-; RUN: llc < %s -mtriple=x86_64-apple-darwin10 | FileCheck %s
+; RUN: llc < %s -mtriple=i386-apple-darwin10 | FileCheck -check-prefixes=CHECK,BZERO %s
+; RUN: llc < %s -mtriple=x86_64-apple-darwin10 | FileCheck -check-prefixes=CHECK,BZERO %s
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck -check-prefixes=CHECK,NOBZERO %s
+; RUN: llc < %s -mtriple=x86_64-apple-ios10.0-simulator | FileCheck -check-prefixes=CHECK,NOBZERO %s
 
 declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind
 
 ; CHECK-LABEL: foo:
-; CHECK: {{calll|callq}} ___bzero
+; BZERO: {{calll|callq}} ___bzero
+; NOBZERO-NOT: bzero
 define void @foo(i8* %p, i32 %len) {
   call void @llvm.memset.p0i8.i32(i8* %p, i8 0, i32 %len, i32 1, i1 false)
   ret void