From 6d027f2e6fb2d25603eeaccfca71d5d576367a6d Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Wed, 6 Apr 2005 20:59:35 +0000 Subject: [PATCH] Fix SingleSource/Regression/C/2005-05-06-LongLongSignedShift.c, we were not properly sign extending the top of the result of a 64-bit shift right by a constant > 32. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21120 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/X86/X86ISelSimple.cpp | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/lib/Target/X86/X86ISelSimple.cpp b/lib/Target/X86/X86ISelSimple.cpp index b39396854dd..48546aa54f0 100644 --- a/lib/Target/X86/X86ISelSimple.cpp +++ b/lib/Target/X86/X86ISelSimple.cpp @@ -3074,7 +3074,11 @@ void X86ISel::emitShiftOperation(MachineBasicBlock *MBB, } else { BuildMI(*MBB, IP, isSigned ? X86::SAR32ri : X86::SHR32ri, 2, DestReg).addReg(SrcReg+1).addImm(Amount); - BuildMI(*MBB, IP, X86::MOV32ri, 1, DestReg+1).addImm(0); + if (isSigned) + BuildMI(*MBB, IP, X86::SAR32ri, 2, + DestReg+1).addReg(SrcReg+1).addImm(31); + else + BuildMI(*MBB, IP, X86::MOV32ri, 1, DestReg+1).addImm(0); } } } else { -- 2.34.1