[Xtensa] Improve fixup error messages in asm backend.

Add different diagnotstics messages for different branch
relocations fixups.

0001-Xtensa-Improve-fixup-error-messages-in-asm-backend.patch

@@ -0,0 +1,68 @@
+From c8f321e8f88802dd427bc9772da171d5c889a77d Mon Sep 17 00:00:00 2001
+From: Andrei Safronov <safronov@espressif.com>
+Date: Thu, 9 Mar 2023 10:30:04 +0300
+Subject: [PATCH] [Xtensa] Improve fixup error messages in asm backend.
+
+---
+ .../Xtensa/MCTargetDesc/XtensaAsmBackend.cpp       | 14 +++++++-------
+ 1 file changed, 7 insertions(+), 7 deletions(-)
+
+diff --git a/llvm/lib/Target/Xtensa/MCTargetDesc/XtensaAsmBackend.cpp b/llvm/lib/Target/Xtensa/MCTargetDesc/XtensaAsmBackend.cpp
+index 4039804b1b58..6981c82e768f 100644
+--- a/llvm/lib/Target/Xtensa/MCTargetDesc/XtensaAsmBackend.cpp
++++ b/llvm/lib/Target/Xtensa/MCTargetDesc/XtensaAsmBackend.cpp
+@@ -93,7 +93,7 @@ static uint64_t adjustFixupValue(const MCFixup &Fixup, uint64_t Value,
+   case Xtensa::fixup_xtensa_branch_6: {
+     Value -= 4;
+     if (!isInt<6>(Value))
+-      Ctx.reportError(Fixup.getLoc(), "fixup value out of range");
++      Ctx.reportError(Fixup.getLoc(), "branch 6-bit fixup value out is of range");
+     unsigned Hi2 = (Value >> 4) & 0x3;
+     unsigned Lo4 = Value & 0xf;
+     return (Hi2 << 4) | (Lo4 << 12);
+@@ -101,36 +101,36 @@ static uint64_t adjustFixupValue(const MCFixup &Fixup, uint64_t Value,
+   case Xtensa::fixup_xtensa_branch_8:
+     Value -= 4;
+     if (!isInt<8>(Value))
+-      Ctx.reportError(Fixup.getLoc(), "fixup value out of range");
++      Ctx.reportError(Fixup.getLoc(), "branch 8-bit fixup value out of range");
+     return (Value & 0xff);
+   case Xtensa::fixup_xtensa_branch_12:
+     Value -= 4;
+     if (!isInt<12>(Value))
+-      Ctx.reportError(Fixup.getLoc(), "fixup value out of range");
++      Ctx.reportError(Fixup.getLoc(), "branch 12-bit fixup value out of range");
+     return (Value & 0xfff);
+   case Xtensa::fixup_xtensa_jump_18:
+     Value -= 4;
+     if (!isInt<18>(Value))
+-      Ctx.reportError(Fixup.getLoc(), "fixup value out of range");
++      Ctx.reportError(Fixup.getLoc(), "jump fixup value out of range");
+     return (Value & 0x3ffff);
+   case Xtensa::fixup_xtensa_call_18:
+     Value -= 4;
+     if (!isInt<20>(Value))
+-      Ctx.reportError(Fixup.getLoc(), "fixup value out of range");
++      Ctx.reportError(Fixup.getLoc(), "call fixup value out of range");
+     if (Value & 0x3)
+       Ctx.reportError(Fixup.getLoc(), "fixup value must be 4-byte aligned");
+     return (Value & 0xffffc) >> 2;
+   case Xtensa::fixup_xtensa_loop_8:
+     Value -= 4;
+     if (!isUInt<8>(Value))
+-      Ctx.reportError(Fixup.getLoc(), "fixup value out of range");
++      Ctx.reportError(Fixup.getLoc(), "loop fixup value out of range");
+     return (Value & 0xff);
+   case Xtensa::fixup_xtensa_l32r_16:
+     unsigned Offset = Fixup.getOffset();
+     if (Offset & 0x3)
+       Value -= 4;
+     if (!isInt<18>(Value) && (Value & 0x20000))
+-      Ctx.reportError(Fixup.getLoc(), "fixup value out of range");
++      Ctx.reportError(Fixup.getLoc(), "l32r fixup value out of range");
+     if (Value & 0x3)
+       Ctx.reportError(Fixup.getLoc(), "fixup value must be 4-byte aligned");
+     return (Value & 0x3fffc) >> 2;
+-- 
+2.25.1
+

llvm/lib/Target/Xtensa/MCTargetDesc/XtensaAsmBackend.cpp

@@ -93,44 +93,44 @@ static uint64_t adjustFixupValue(const MCFixup &Fixup, uint64_t Value,
   case Xtensa::fixup_xtensa_branch_6: {
     Value -= 4;
     if (!isInt<6>(Value))
-      Ctx.reportError(Fixup.getLoc(), "fixup value out of range");
+      Ctx.reportError(Fixup.getLoc(), "branch 6-bit fixup value out is of range");
     unsigned Hi2 = (Value >> 4) & 0x3;
     unsigned Lo4 = Value & 0xf;
     return (Hi2 << 4) | (Lo4 << 12);
   }
   case Xtensa::fixup_xtensa_branch_8:
     Value -= 4;
     if (!isInt<8>(Value))
-      Ctx.reportError(Fixup.getLoc(), "fixup value out of range");
+      Ctx.reportError(Fixup.getLoc(), "branch 8-bit fixup value out of range");
     return (Value & 0xff);
   case Xtensa::fixup_xtensa_branch_12:
     Value -= 4;
     if (!isInt<12>(Value))
-      Ctx.reportError(Fixup.getLoc(), "fixup value out of range");
+      Ctx.reportError(Fixup.getLoc(), "branch 12-bit fixup value out of range");
     return (Value & 0xfff);
   case Xtensa::fixup_xtensa_jump_18:
     Value -= 4;
     if (!isInt<18>(Value))
-      Ctx.reportError(Fixup.getLoc(), "fixup value out of range");
+      Ctx.reportError(Fixup.getLoc(), "jump fixup value out of range");
     return (Value & 0x3ffff);
   case Xtensa::fixup_xtensa_call_18:
     Value -= 4;
     if (!isInt<20>(Value))
-      Ctx.reportError(Fixup.getLoc(), "fixup value out of range");
+      Ctx.reportError(Fixup.getLoc(), "call fixup value out of range");
     if (Value & 0x3)
       Ctx.reportError(Fixup.getLoc(), "fixup value must be 4-byte aligned");
     return (Value & 0xffffc) >> 2;
   case Xtensa::fixup_xtensa_loop_8:
     Value -= 4;
     if (!isUInt<8>(Value))
-      Ctx.reportError(Fixup.getLoc(), "fixup value out of range");
+      Ctx.reportError(Fixup.getLoc(), "loop fixup value out of range");
     return (Value & 0xff);
   case Xtensa::fixup_xtensa_l32r_16:
     unsigned Offset = Fixup.getOffset();
     if (Offset & 0x3)
       Value -= 4;
     if (!isInt<18>(Value) && (Value & 0x20000))
-      Ctx.reportError(Fixup.getLoc(), "fixup value out of range");
+      Ctx.reportError(Fixup.getLoc(), "l32r fixup value out of range");
     if (Value & 0x3)
       Ctx.reportError(Fixup.getLoc(), "fixup value must be 4-byte aligned");
     return (Value & 0x3fffc) >> 2;

llvm/test/MC/Xtensa/fixups-diagnostics.s

@@ -2,9 +2,9 @@
 
   .align 4
 
-  beq a0, a1, LBL1 # CHECK: :[[@LINE]]:3: error: fixup value out of range
+  beq a0, a1, LBL1 # CHECK: :[[@LINE]]:3: error: branch 8-bit fixup value out of range
 LBL0:
-  beqz a0, LBL2 # CHECK: :[[@LINE]]:3: error: fixup value out of range
+  beqz a0, LBL2 # CHECK: :[[@LINE]]:3: error: branch 12-bit fixup value out of range
 
   call0 LBL0 # CHECK: :[[@LINE]]:3: error: fixup value must be 4-byte aligned