[PATCH] D53366: [mips][micromips] Add pattern for JmpLink to TargetExternalSymbol

[Aleksandar Beserminji via Phabricator via llvm-commits]

abeserminji created this revision.
abeserminji added reviewers: petarj, atanasyan.
Herald added subscribers: jrtc27, arichardson, sdardis.

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


Repository:
  rL LLVM

https://reviews.llvm.org/D53366

Files:
  lib/Target/Mips/MicroMipsInstrInfo.td
  test/CodeGen/Mips/micromips-target-external-symbol-reloc.ll


Index: test/CodeGen/Mips/micromips-target-external-symbol-reloc.ll
===================================================================
--- /dev/null
+++ test/CodeGen/Mips/micromips-target-external-symbol-reloc.ll
@@ -0,0 +1,14 @@
+; RUN: llc -mtriple=mips-mti-linux-gnu -mcpu=mips32r2 -mattr=+micromips -filetype=obj < %s | llvm-objdump -D -r - | FileCheck %s
+
+; CHECK: R_MICROMIPS_26_S1 memset
+; CHECK-NOT: R_MIPS_32 memset
+
+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)
+
Index: lib/Target/Mips/MicroMipsInstrInfo.td
===================================================================
--- lib/Target/Mips/MicroMipsInstrInfo.td
+++ lib/Target/Mips/MicroMipsInstrInfo.td
@@ -1451,3 +1451,5 @@
 def : MipsInstAlias<"mthgc0 $rt, $rs",
                     (MTHGC0_MM COP0Opnd:$rs, GPR32Opnd:$rt, 0), 0>,
                     ISA_MICROMIPS32R5, ASE_VIRT;
+def : MipsPat<(MipsJmpLink (i32 texternalsym:$dst)),
+              (JAL_MM texternalsym:$dst)>, ISA_MICROMIPS32_NOT_MIPS32R6;
\ No newline at end of file


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