MaskRay marked 2 inline comments as done.
MaskRay added inline comments.

================
Comment at: llvm/lib/Target/RISCV/RISCVMCInstLower.cpp:247
   }
+  return false;
 }
----------------
jrtc27 wrote:
> true, surely?
false.

We want to call `EmitToStreamer(*OutStreamer, TmpInst);`

If a pseudo instruction is not handled here, in MCAsmStreamer we will see its 
comment (`AsmString`).


================
Comment at: llvm/test/CodeGen/RISCV/patchable-function-entry.ll:1-3
+;; Test the function attribute "patchable-function-entry".
+; RUN: llc -mtriple=riscv32 < %s | FileCheck %s --check-prefixes=CHECK,32
+; RUN: llc -mtriple=riscv64 < %s | FileCheck %s --check-prefixes=CHECK,64
----------------
jrtc27 wrote:
> luismarques wrote:
> > jrtc27 wrote:
> > > Please match the style of the other tests: 
> > > - update_llc_test_checks.py
> > > - RV32I/RV32IC/RV64I/RV64IC
> > > Please match the style of the other tests: 
> > > - update_llc_test_checks.py
> > 
> > I was going to comment on that but I was unsure it applied here, given that 
> > this test was running more than just `llc`. The other RISC-V CodeGen tests 
> > we have with objdump don't use the update script IIRC. (And these manual 
> > tests were neatly written and much more condensed that the sprawling output 
> > of the auto updated checks). But I agree that in general using the script 
> > is the way to go for the RISC-V tests.
> Yeah, though as you'll see in my comment below I don't think using 
> llvm-objdump adds any value, at which point UTC works just fine.
I do not think we can use `update_llc_test_checks.py`. We should test 
`__patchable_function_entries` which can be scrubbed by 
`update_llc_test_checks.py`.

The test is written in such a way with low maintenance: it will very unlikely 
change due to codegen differences. (The one `; CHECK-NEXT:    addi sp, sp, -16` 
below is the only exception.)

Testing more variants seems wasteful.



================
Comment at: llvm/test/CodeGen/RISCV/patchable-function-entry.ll:5-9
+;; RVC uses 2-byte nop.
+; RUN: llc -filetype=obj -mtriple=riscv64 %s -o %t.o
+; RUN: llvm-objdump -d %t.o | FileCheck %s --check-prefix=NORVC
+; RUN: llc -filetype=obj -mtriple=riscv64 -mattr=+c %s -o %tc.o
+; RUN: llvm-objdump -d %tc.o | FileCheck %s --check-prefix=RVC
----------------
jrtc27 wrote:
> I don't think this is particularly useful if we've checked the assembly 
> output (and it stops us using update_llc_test_checks.py), we know nops get 
> emitted correctly, that's tested in various other places.
objdump -d/llvm-objdump -d does not print c.nop => it is an important detail. 
Without it we cannot make sure the correct number of bytes is used.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D98610/new/

https://reviews.llvm.org/D98610

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