Relax GOTPCREL relocations for tail jmp instructions.

Differential Revision: https://reviews.llvm.org/D47563

llvm-svn: 333676

diff --git a/llvm/lib/Target/X86/MCTargetDesc/X86MCCodeEmitter.cpp b/llvm/lib/Target/X86/MCTargetDesc/X86MCCodeEmitter.cpp
index 9e2d622..7e43417 100644 (file)
--- a/llvm/lib/Target/X86/MCTargetDesc/X86MCCodeEmitter.cpp
+++ b/llvm/lib/Target/X86/MCTargetDesc/X86MCCodeEmitter.cpp
@@ -399,6 +399,7 @@ void X86MCCodeEmitter::emitMemModRMByte(const MCInst &MI, unsigned Op,
         return X86::reloc_riprel_4byte_movq_load;
       case X86::CALL64m:
       case X86::JMP64m:
+      case X86::TAILJMPm64:
       case X86::TEST64mr:
       case X86::ADC64rm:
       case X86::ADD64rm:

diff --git a/llvm/test/CodeGen/X86/tailjmp_gotpcrel_relax_relocation.ll b/llvm/test/CodeGen/X86/tailjmp_gotpcrel_relax_relocation.ll
new file mode 100644 (file)
index 0000000..3fb161c
--- /dev/null
+++ b/llvm/test/CodeGen/X86/tailjmp_gotpcrel_relax_relocation.ll
@@ -0,0 +1,15 @@
+; RUN: llc -filetype=obj -relax-elf-relocations=true -mtriple=x86_64-linux-gnu -o - %s |  llvm-objdump - -d -r | FileCheck %s
+
+; CHECK: jmpq *(%rip)
+; CHECK-NEXT: R_X86_64_GOTPCRELX
+
+define i32 @main() {
+entry:
+  %call = tail call i32 @foo()
+  ret i32 %call
+}
+
+; Function Attrs: nonlazybind
+declare i32 @foo() #1
+
+attributes #1 = { nonlazybind }