If user explicitly asks not to use SSE, don't force it. This fixes LLVM part of PR3402.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62967 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86Subtarget.cpp b/lib/Target/X86/X86Subtarget.cpp
index 5dc5103727d5af752e9a59e2e5499a3418d63ea7..99708e04cf9c5f61835fe43a6d35a36613d0d1ea 100644 (file)
--- a/lib/Target/X86/X86Subtarget.cpp
+++ b/lib/Target/X86/X86Subtarget.cpp
@@ -331,8 +331,6 @@ X86Subtarget::X86Subtarget(const Module &M, const std::string &FS, bool is64Bit)
   // are enabled.  These are available on all x86-64 CPUs.
   if (Is64Bit) {
     HasX86_64 = true;
-    if (X86SSELevel < SSE2)
-      X86SSELevel = SSE2;
   }
   DOUT << "Subtarget features: SSELevel " << X86SSELevel
        << ", 3DNowLevel " << X863DNowLevel

diff --git a/test/CodeGen/X86/2009-01-25-NoSSE.ll b/test/CodeGen/X86/2009-01-25-NoSSE.ll
new file mode 100644 (file)
index 0000000..b12e413
--- /dev/null
+++ b/test/CodeGen/X86/2009-01-25-NoSSE.ll
@@ -0,0 +1,20 @@
+; RUN: llvm-as < %s | llc -march=x86-64 -mattr=-sse,-sse2 | not grep xmm
+; PR3402
+target datalayout =
+"e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
+target triple = "x86_64-unknown-linux-gnu"
+        %struct.ktermios = type { i32, i32, i32, i32, i8, [19 x i8], i32, i32 }
+
+define void @foo() nounwind {
+entry:
+        %termios = alloca %struct.ktermios, align 8
+        %termios1 = bitcast %struct.ktermios* %termios to i8*
+        call void @llvm.memset.i64(i8* %termios1, i8 0, i64 44, i32 8)
+        call void @bar(%struct.ktermios* %termios) nounwind
+        ret void
+}
+
+declare void @llvm.memset.i64(i8* nocapture, i8, i64, i32) nounwind
+
+declare void @bar(%struct.ktermios*)
+