[llvm] e7d432f - [JITLink][RISCV] Improve R_RISCV_JAL

[Jonas Hahnfeld via llvm-commits]

Author: Jonas Hahnfeld
Date: 2023-01-03T17:18:39+01:00
New Revision: e7d432fd67c88d3c70be82ff0d424dd8993afb58

URL: https://github.com/llvm/llvm-project/commit/e7d432fd67c88d3c70be82ff0d424dd8993afb58
DIFF: https://github.com/llvm/llvm-project/commit/e7d432fd67c88d3c70be82ff0d424dd8993afb58.diff

LOG: [JITLink][RISCV] Improve R_RISCV_JAL

Only take the lower 12 bits of RawInstr.

Differential Revision: https://reviews.llvm.org/D140820

Added: 
    

Modified: 
    llvm/lib/ExecutionEngine/JITLink/ELF_riscv.cpp

Removed: 
    


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diff  --git a/llvm/lib/ExecutionEngine/JITLink/ELF_riscv.cpp b/llvm/lib/ExecutionEngine/JITLink/ELF_riscv.cpp
index f60953f5278b..3fcc45eab255 100644
--- a/llvm/lib/ExecutionEngine/JITLink/ELF_riscv.cpp
+++ b/llvm/lib/ExecutionEngine/JITLink/ELF_riscv.cpp
@@ -224,7 +224,8 @@ class ELFJITLinker_riscv : public JITLinker<ELFJITLinker_riscv> {
       uint32_t Imm11 = extractBits(Value, 11, 1) << 20;
       uint32_t Imm19_12 = extractBits(Value, 12, 8) << 12;
       uint32_t RawInstr = *(little32_t *)FixupPtr;
-      *(little32_t *)FixupPtr = RawInstr | Imm20 | Imm10_1 | Imm11 | Imm19_12;
+      *(little32_t *)FixupPtr =
+          (RawInstr & 0xFFF) | Imm20 | Imm10_1 | Imm11 | Imm19_12;
       break;
     }
     case R_RISCV_CALL: {