X86: Call _alldiv instead of __divdi3 on Windows (excluding cygwin).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116174 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 89ae4e8d966219755b4f58aac13f7464bc819bf1..74fe6473706beff2105c9542366ea927377f8be0 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -96,6 +96,12 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
   setSchedulingPreference(Sched::RegPressure);
   setStackPointerRegisterToSaveRestore(X86StackPtr);
 
+  if (Subtarget->isTargetWindows() && !Subtarget->isTargetCygwin()) {
+    // Setup Windows compiler runtime calls.
+    setLibcallName(RTLIB::SDIV_I64, "_alldiv");
+    setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::X86_StdCall);
+  }
+
   if (Subtarget->isTargetDarwin()) {
     // Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
     setUseUnderscoreSetJmp(false);

diff --git a/test/CodeGen/X86/alldiv-divdi3.ll b/test/CodeGen/X86/alldiv-divdi3.ll
new file mode 100644 (file)
index 0000000..250d7d8
--- /dev/null
+++ b/test/CodeGen/X86/alldiv-divdi3.ll
@@ -0,0 +1,16 @@
+; Test that, for a 64 bit signed div, a libcall to alldiv is made on Windows
+; except for cygwin.
+
+; RUN: llc < %s -mtriple i386-pc-win32 | FileCheck %s
+; RUN: llc < %s -mtriple i386-pc-cygwin | FileCheck %s -check-prefix CYGWIN
+
+define i32 @main(i32 %argc, i8** nocapture %argv) nounwind readonly {
+entry:
+  %conv4 = sext i32 %argc to i64
+  %div = sdiv i64 84, %conv4
+  %conv7 = trunc i64 %div to i32
+  ret i32 %conv7
+}
+
+; CHECK: alldiv
+; CYGWIN: divdi3

diff --git a/test/CodeGen/X86/legalizedag_vec.ll b/test/CodeGen/X86/legalizedag_vec.ll
index 574b46acea60cfc13b6cae80cd8d11dc7030f2f3..028627d3c093a11860fbc0e5787c66f72537feae 100644 (file)
--- a/test/CodeGen/X86/legalizedag_vec.ll
+++ b/test/CodeGen/X86/legalizedag_vec.ll
@@ -1,5 +1,4 @@
-; RUN: llc < %s -march=x86 -mattr=sse2 -disable-mmx -o %t
-; RUN: grep {call.*divdi3}  %t | count 2
+; RUN: llc < %s -march=x86 -mattr=sse2 -disable-mmx | FileCheck %s
 
 
 ; Test case for r63760 where we generate a legalization assert that an illegal
@@ -12,4 +11,7 @@
 define <2 x i64> @test_long_div(<2 x i64> %num, <2 x i64> %div) {
   %div.r = sdiv <2 x i64> %num, %div
   ret <2 x i64>  %div.r
-}                                     
+}
+
+; CHECK: call{{.*(divdi3|alldiv)}}
+; CHECK: call{{.*(divdi3|alldiv)}}