From: Joerg Sonnenberger <joerg@bec.de>
Date: Tue, 23 Apr 2019 15:15:33 +0000 (+0000)
Subject: [SPARC] Use the correct register set for the "r" asm constraint.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=9d3d80ccad494d31c8b290fc9e78860282f454b4;p=llvm

[SPARC] Use the correct register set for the "r" asm constraint.

64bit mode must use 64bit registers, otherwise assumptions about the top
half of the registers are made. Problem found by Takeshi Nakayama in
NetBSD.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358998 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/Sparc/SparcISelLowering.cpp b/lib/Target/Sparc/SparcISelLowering.cpp
index 05c6cce19d3..a6d440fa8aa 100644
--- a/lib/Target/Sparc/SparcISelLowering.cpp
+++ b/lib/Target/Sparc/SparcISelLowering.cpp
@@ -3258,6 +3258,8 @@ SparcTargetLowering::getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI,
     case 'r':
       if (VT == MVT::v2i32)
         return std::make_pair(0U, &SP::IntPairRegClass);
+      else if (Subtarget->is64Bit())
+        return std::make_pair(0U, &SP::I64RegsRegClass);
       else
         return std::make_pair(0U, &SP::IntRegsRegClass);
     case 'f':
diff --git a/test/CodeGen/SPARC/reg64.ll b/test/CodeGen/SPARC/reg64.ll
new file mode 100644
index 00000000000..74f4d46568f
--- /dev/null
+++ b/test/CodeGen/SPARC/reg64.ll
@@ -0,0 +1,10 @@
+; RUN: llc < %s -march=sparcv9 | FileCheck %s
+
+define dso_local zeroext i32 @f() local_unnamed_addr {
+entry:
+  %0 = tail call i64 asm "", "=r"()
+  %shr = lshr i64 %0, 32
+  %conv = trunc i64 %shr to i32
+  ret i32 %conv
+}
+; CHECK: srlx