[llvm] r208949 - ARM: add some integer/floating point conversion libcalls

[Saleem Abdulrasool]

Author: compnerd
Date: Fri May 16 00:41:33 2014
New Revision: 208949

URL: http://llvm.org/viewvc/llvm-project?rev=208949&view=rev
Log:
ARM: add some integer/floating point conversion libcalls

Add some Windows on ARM specific library calls.  These are provided by msvcrt,
and can be used to perform integer to floating-point conversions (and
vice-versa) mirroring similar functions in the RTABI.

Added:
    llvm/trunk/test/CodeGen/ARM/Windows/integer-floating-point-conversion.ll
Modified:
    llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp

Modified: llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp?rev=208949&r1=208948&r2=208949&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp Fri May 16 00:41:33 2014
@@ -418,6 +418,28 @@ ARMTargetLowering::ARMTargetLowering(Tar
     setLibcallCallingConv(RTLIB::MEMSET, CallingConv::ARM_AAPCS);
   }
 
+  if (Subtarget->isTargetWindows()) {
+    static const struct {
+      const RTLIB::Libcall Op;
+      const char * const Name;
+      const CallingConv::ID CC;
+    } LibraryCalls[] = {
+      { RTLIB::FPTOSINT_F32_I64, "__stoi64", CallingConv::ARM_AAPCS_VFP },
+      { RTLIB::FPTOSINT_F64_I64, "__dtoi64", CallingConv::ARM_AAPCS_VFP },
+      { RTLIB::FPTOUINT_F32_I64, "__stou64", CallingConv::ARM_AAPCS_VFP },
+      { RTLIB::FPTOUINT_F64_I64, "__dtou64", CallingConv::ARM_AAPCS_VFP },
+      { RTLIB::SINTTOFP_I64_F32, "__i64tos", CallingConv::ARM_AAPCS_VFP },
+      { RTLIB::SINTTOFP_I64_F64, "__i64tod", CallingConv::ARM_AAPCS_VFP },
+      { RTLIB::UINTTOFP_I64_F32, "__u64tos", CallingConv::ARM_AAPCS_VFP },
+      { RTLIB::UINTTOFP_I64_F64, "__u64tod", CallingConv::ARM_AAPCS_VFP },
+    };
+
+    for (const auto &LC : LibraryCalls) {
+      setLibcallName(LC.Op, LC.Name);
+      setLibcallCallingConv(LC.Op, LC.CC);
+    }
+  }
+
   // Use divmod compiler-rt calls for iOS 5.0 and later.
   if (Subtarget->getTargetTriple().isiOS() &&
       !Subtarget->getTargetTriple().isOSVersionLT(5, 0)) {

Added: llvm/trunk/test/CodeGen/ARM/Windows/integer-floating-point-conversion.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/ARM/Windows/integer-floating-point-conversion.ll?rev=208949&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/ARM/Windows/integer-floating-point-conversion.ll (added)
+++ llvm/trunk/test/CodeGen/ARM/Windows/integer-floating-point-conversion.ll Fri May 16 00:41:33 2014
@@ -0,0 +1,74 @@
+; RUN: llc -mtriple thumbv7-windows -filetype asm -o - %s | FileCheck %s
+
+define arm_aapcs_vfpcc i64 @stoi64(float %f) {
+entry:
+  %conv = fptosi float %f to i64
+  ret i64 %conv
+}
+
+; CHECK-LABEL: stoi64
+; CHECK: bl __stoi64
+
+define arm_aapcs_vfpcc i64 @stou64(float %f) {
+entry:
+  %conv = fptoui float %f to i64
+  ret i64 %conv
+}
+
+; CHECK-LABEL: stou64
+; CHECK: bl __stou64
+
+define arm_aapcs_vfpcc float @i64tos(i64 %i64) {
+entry:
+  %conv = sitofp i64 %i64 to float
+  ret float %conv
+}
+
+; CHECK-LABEL: i64tos
+; CHECK: bl __i64tos
+
+define arm_aapcs_vfpcc float @u64tos(i64 %u64) {
+entry:
+  %conv = uitofp i64 %u64 to float
+  ret float %conv
+}
+
+; CHECK-LABEL: u64tos
+; CHECK: bl __u64tos
+
+define arm_aapcs_vfpcc i64 @dtoi64(double %d) {
+entry:
+  %conv = fptosi double %d to i64
+  ret i64 %conv
+}
+
+; CHECK-LABEL: dtoi64
+; CHECK: bl __dtoi64
+
+define arm_aapcs_vfpcc i64 @dtou64(double %d) {
+entry:
+  %conv = fptoui double %d to i64
+  ret i64 %conv
+}
+
+; CHECK-LABEL: dtou64
+; CHECK: bl __dtou64
+
+define arm_aapcs_vfpcc double @i64tod(i64 %i64) {
+entry:
+  %conv = sitofp i64 %i64 to double
+  ret double %conv
+}
+
+; CHECK-LABEL: i64tod
+; CHECK: bl __i64tod
+
+define arm_aapcs_vfpcc double @u64tod(i64 %i64) {
+entry:
+  %conv = uitofp i64 %i64 to double
+  ret double %conv
+}
+
+; CHECK-LABEL: u64tod
+; CHECK: bl __u64tod
+