[llvm-commits] [llvm] r168747 - in /llvm/trunk: lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp test/CodeGen/PowerPC/mcm-default.ll

[Bill Schmidt]

Author: wschmidt
Date: Tue Nov 27 17:36:26 2012
New Revision: 168747

URL: http://llvm.org/viewvc/llvm-project?rev=168747&view=rev
Log:
This patch makes medium code model the default for 64-bit PowerPC ELF.

When the CodeGenInfo is to be created for the PPC64 target machine,
a default code-model selection is converted to CodeModel::Medium
provided we are not targeting the Darwin OS.  Defaults for Darwin
are unaffected.


Added:
    llvm/trunk/test/CodeGen/PowerPC/mcm-default.ll
Modified:
    llvm/trunk/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp

Modified: llvm/trunk/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp?rev=168747&r1=168746&r2=168747&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp (original)
+++ llvm/trunk/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp Tue Nov 27 17:36:26 2012
@@ -88,6 +88,11 @@
     else
       RM = Reloc::Static;
   }
+  if (CM == CodeModel::Default) {
+    Triple T(TT);
+    if (!T.isOSDarwin() && T.getArch() == Triple::ppc64)
+      CM = CodeModel::Medium;
+  }
   X->InitMCCodeGenInfo(RM, CM, OL);
   return X;
 }

Added: llvm/trunk/test/CodeGen/PowerPC/mcm-default.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/PowerPC/mcm-default.ll?rev=168747&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/PowerPC/mcm-default.ll (added)
+++ llvm/trunk/test/CodeGen/PowerPC/mcm-default.ll Tue Nov 27 17:36:26 2012
@@ -0,0 +1,26 @@
+; RUN: llc -mcpu=pwr7 -O0 <%s | FileCheck %s
+
+; Test that we generate code for the medium model as the default.
+; Use an external variable reference as an example.
+
+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-f128:128:128-v128:128:128-n32:64"
+target triple = "powerpc64-unknown-linux-gnu"
+
+ at ei = external global i32
+
+define signext i32 @test_external() nounwind {
+entry:
+  %0 = load i32* @ei, align 4
+  %inc = add nsw i32 %0, 1
+  store i32 %inc, i32* @ei, align 4
+  ret i32 %0
+}
+
+; CHECK: test_external:
+; CHECK: addis [[REG1:[0-9]+]], 2, .LC[[TOCNUM:[0-9]+]]@toc at ha
+; CHECK: ld [[REG2:[0-9]+]], .LC[[TOCNUM]]@toc at l([[REG1]])
+; CHECK: lwz {{[0-9]+}}, 0([[REG2]])
+; CHECK: stw {{[0-9]+}}, 0([[REG2]])
+; CHECK: .section .toc
+; CHECK: .LC[[TOCNUM]]:
+; CHECK: .tc {{[a-z0-9A-Z_.]+}}[TC],{{[a-z0-9A-Z_.]+}}