[mips][micromips] Fix JmpLink to TargetExternalSymbol

When matching MipsISD::JmpLink t9, TargetExternalSymbol:i32'...',
wrong JALR16_MM is selected. This patch adds missing pattern for
JmpLink, so that JAL instruction is selected.

Differential Revision: https://reviews.llvm.org/D53366

llvm-svn: 345830

diff --git a/llvm/lib/Target/Mips/MicroMipsInstrInfo.td b/llvm/lib/Target/Mips/MicroMipsInstrInfo.td
index 174a05ea7af6be8f915c37994bf1b912ca99877a..af380a0ec71e0a0b52d16cacb4a609e232247d79 100644 (file)
--- a/llvm/lib/Target/Mips/MicroMipsInstrInfo.td
+++ b/llvm/lib/Target/Mips/MicroMipsInstrInfo.td
@@ -1271,6 +1271,8 @@ let AddedComplexity = 40 in
 def : MipsPat<(bswap GPR32:$rt), (ROTR_MM (WSBH_MM GPR32:$rt), 16)>,
       ISA_MICROMIPS;
 
+def : MipsPat<(MipsJmpLink (i32 texternalsym:$dst)),
+              (JAL_MM texternalsym:$dst)>, ISA_MICROMIPS32_NOT_MIPS32R6;
 def : MipsPat<(MipsTailCall (iPTR tglobaladdr:$dst)),
               (TAILCALL_MM tglobaladdr:$dst)>, ISA_MICROMIPS32_NOT_MIPS32R6;
 def : MipsPat<(MipsTailCall (iPTR texternalsym:$dst)),

diff --git a/llvm/test/CodeGen/Mips/micromips-target-external-symbol-reloc.ll b/llvm/test/CodeGen/Mips/micromips-target-external-symbol-reloc.ll
new file mode 100644 (file)
index 0000000..df592c4
--- /dev/null
+++ b/llvm/test/CodeGen/Mips/micromips-target-external-symbol-reloc.ll
@@ -0,0 +1,13 @@
+; RUN: llc -mtriple=mips-mti-linux-gnu -mcpu=mips32r2 -mattr=+micromips -stop-after=expand-isel-pseudos < %s | FileCheck %s
+
+; CHECK: JAL_MM
+; CHECK-NOT: JALR16_MM
+
+define dso_local void @foo(i32* nocapture %ar) local_unnamed_addr {
+entry:
+  %0 = bitcast i32* %ar to i8*
+  tail call void @llvm.memset.p0i8.i32(i8* align 4 %0, i8 0, i32 100, i1 false)
+  ret void
+}
+
+declare void @llvm.memset.p0i8.i32(i8* nocapture writeonly, i8, i32, i1)