make mcinstlower remove all but the first operand to CALL64pcrel32.
The register use operands (e.g. the first argument is passed in a
register) is currently being modeled as a normal register use,
instead of correctly being an implicit use. This causes the operand
to get propagated onto the mcinst, which was causing the encoder to
emit a rex prefix byte, which generates an invalid call.
This fixes rdar://7998435
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104062 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp b/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp
index ad93083..f5e9601 100644
--- a/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp
+++ b/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp
@@ -329,7 +329,17 @@
LowerSubReg32_Op0(OutMI, X86::MOV32r0); // MOV64r0 -> MOV32r0
LowerUnaryToTwoAddr(OutMI, X86::XOR32rr); // MOV32r0 -> XOR32rr
break;
-
+
+ // CALL64pcrel32 - This instruction has register inputs modeled as normal
+ // uses instead of implicit uses. As such, truncate off all but the first
+ // operand (the callee). FIXME: Change isel.
+ case X86::CALL64pcrel32: {
+ MCOperand Saved = OutMI.getOperand(0);
+ OutMI = MCInst();
+ OutMI.setOpcode(X86::CALL64pcrel32);
+ OutMI.addOperand(Saved);
+ break;
+ }
// The assembler backend wants to see branches in their small form and relax
// them to their large form. The JIT can only handle the large form because