community/llvm3.9: move back from unmaintained

1 files changed, 118 insertions, 0 deletions

diff --git a/community/llvm3.9/rust-lang-llvm-pr57.patch b/community/llvm3.9/rust-lang-llvm-pr57.patch
new file mode 100644
index 0000000000..eda4d9a41f
--- /dev/null
+++ b/community/llvm3.9/rust-lang-llvm-pr57.patch
@@ -0,0 +1,118 @@
+From 5ac4f80be3e8b5d42475aeaba246455e0016c7ef Mon Sep 17 00:00:00 2001
+From: Anthony Ramine <n.oxyde@gmail.com>
+Date: Sun, 27 Nov 2016 16:28:12 +0100
+Subject: [rust-lang/llvm#57] Backport rL277331
+
+---
+ lib/Target/AArch64/AArch64InstrInfo.cpp            |  3 +
+ .../MIR/AArch64/inst-size-tlsdesc-callseq.mir      | 84 ++++++++++++++++++++++
+ 2 files changed, 87 insertions(+)
+ create mode 100644 test/CodeGen/MIR/AArch64/inst-size-tlsdesc-callseq.mir
+
+diff --git a/lib/Target/AArch64/AArch64InstrInfo.cpp b/lib/Target/AArch64/AArch64InstrInfo.cpp
+index 0aa4708f35ac..d39542a8e4eb 100644
+--- a/lib/Target/AArch64/AArch64InstrInfo.cpp
++++ b/lib/Target/AArch64/AArch64InstrInfo.cpp
+@@ -56,6 +56,9 @@ unsigned AArch64InstrInfo::GetInstSizeInBytes(const MachineInstr &MI) const {
+   case TargetOpcode::IMPLICIT_DEF:
+   case TargetOpcode::KILL:
+     return 0;
++  case AArch64::TLSDESC_CALLSEQ:
++    // This gets lowered to an instruction sequence which takes 16 bytes
++    return 16;
+   }
+ 
+   llvm_unreachable("GetInstSizeInBytes()- Unable to determin insn size");
+diff --git a/test/CodeGen/MIR/AArch64/inst-size-tlsdesc-callseq.mir b/test/CodeGen/MIR/AArch64/inst-size-tlsdesc-callseq.mir
+new file mode 100644
+index 000000000000..2d966ece768e
+--- /dev/null
++++ b/test/CodeGen/MIR/AArch64/inst-size-tlsdesc-callseq.mir
+@@ -0,0 +1,84 @@
++# RUN: llc -mtriple=aarch64-unknown -run-pass aarch64-branch-relax -aarch64-tbz-offset-bits=4 %s -o - | FileCheck %s
++--- |
++  ; ModuleID = 'test.ll'
++  source_filename = "test.ll"
++  target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
++  target triple = "aarch64-unknown"
++
++  @ThreadLocalGlobal = external thread_local local_unnamed_addr global i32, align 8
++
++  define i32 @test_tlsdesc_callseq_length(i32 %in) {
++    %val = and i32 %in, 1
++    %tst = icmp eq i32 %val, 0
++    br i1 %tst, label %true, label %false
++
++  true:                                             ; preds = %0
++    %1 = load i32, i32* @ThreadLocalGlobal, align 8
++    ret i32 %1
++
++  false:                                            ; preds = %0
++    ret i32 0
++  }
++
++...
++---
++# CHECK-LABEL: name:{{.*}}test_tlsdesc_callseq_length
++# If the size of TLSDESC_CALLSEQ is computed correctly, that will push
++# the bb.2.false block too far away from the TBNZW, so the branch will
++# have to be relaxed (note that we're using -aarch64-tbz-offset-bits to
++# constrain the range that can be reached with the TBNZW to something smaller
++# than what TLSDESC_CALLSEQ is lowered to).
++# CHECK: TBZW killed %w0, 0, %bb.1.true
++# CHECK: B %bb.2.false
++name:            test_tlsdesc_callseq_length
++alignment:       2
++exposesReturnsTwice: false
++hasInlineAsm:    false
++allVRegsAllocated: true
++isSSA:           false
++tracksRegLiveness: false
++tracksSubRegLiveness: false
++liveins:
++  - { reg: '%w0' }
++frameInfo:
++  isFrameAddressTaken: false
++  isReturnAddressTaken: false
++  hasStackMap:     false
++  hasPatchPoint:   false
++  stackSize:       16
++  offsetAdjustment: 0
++  maxAlignment:    16
++  adjustsStack:    false
++  hasCalls:        true
++  maxCallFrameSize: 0
++  hasOpaqueSPAdjustment: false
++  hasVAStart:      false
++  hasMustTailInVarArgFunc: false
++stack:
++  - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, callee-saved-register: '%lr' }
++body:             |
++  bb.0 (%ir-block.0):
++    successors: %bb.1.true, %bb.2.false
++    liveins: %w0, %lr
++
++    TBNZW killed %w0, 0, %bb.2.false
++
++  bb.1.true:
++    liveins: %lr
++
++    early-clobber %sp = frame-setup STRXpre killed %lr, %sp, -16 :: (store 8 into %stack.0)
++    frame-setup CFI_INSTRUCTION def_cfa_offset 16
++    frame-setup CFI_INSTRUCTION offset %w30, -16
++    TLSDESC_CALLSEQ target-flags(aarch64-tls) @ThreadLocalGlobal, implicit-def dead %lr, implicit-def %x0, implicit-def dead %x1
++    %x8 = MRS 56962
++    %w0 = LDRWroX killed %x8, killed %x0, 0, 0 :: (load 4 from @ThreadLocalGlobal, align 8)
++    early-clobber %sp, %lr = LDRXpost %sp, 16 :: (load 8 from %stack.0)
++    RET killed %lr, implicit killed %w0
++
++  bb.2.false:
++    liveins: %lr
++
++    %w0 = ORRWrs %wzr, %wzr, 0
++    RET killed %lr, implicit killed %w0
++
++...
+-- 
+2.9.3
+