Merging r322223:

------------------------------------------------------------------------
r322223 | matze | 2018-01-10 12:49:57 -0800 (Wed, 10 Jan 2018) | 5 lines

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.
------------------------------------------------------------------------

git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_60@322681 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/TargetLoweringBase.cpp b/lib/CodeGen/TargetLoweringBase.cpp
index 224ae1a3236aa49dc7fde3044582156450c97340..b29a33ac1c141746cd5e43664436772df5d55bc5 100644 (file)
--- a/lib/CodeGen/TargetLoweringBase.cpp
+++ b/lib/CodeGen/TargetLoweringBase.cpp
@@ -132,9 +132,18 @@ void TargetLoweringBase::InitLibcalls(const Triple &TT) {
     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)) {

diff --git a/test/CodeGen/X86/darwin-bzero.ll b/test/CodeGen/X86/darwin-bzero.ll
index 410d67ff0ec1610c16e394ce332d20f586e7ecc4..3d03ec677a0148bbf716175928e0e1036e054382 100644 (file)
--- a/test/CodeGen/X86/darwin-bzero.ll
+++ b/test/CodeGen/X86/darwin-bzero.ll
@@ -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