[llvm] [AMDGPU] Autogenerate VOP3 literal checks (PR #156038)

[Jay Foad via llvm-commits]

================
@@ -1,404 +1,405 @@
+// NOTE: Assertions have been autogenerated by utils/update_mc_test_checks.py UTC_ARGS: --version 5
+// RUN: not llvm-mc -triple=amdgcn -mcpu=gfx900  -mattr=+wavefrontsize64 -show-encoding %s | FileCheck -check-prefix=GFX9  %s
 // RUN: not llvm-mc -triple=amdgcn -mcpu=gfx1010 -mattr=+wavefrontsize64 -show-encoding %s | FileCheck -check-prefix=GFX10 %s
-// RUN: not llvm-mc -triple=amdgcn -mcpu=gfx900  -show-encoding %s | FileCheck -check-prefix=GFX9 %s
-// RUN: not llvm-mc -triple=amdgcn -mcpu=gfx1010 -mattr=+wavefrontsize64 %s 2>&1 | FileCheck -check-prefix=GFX10-ERR --implicit-check-not=error: %s
-// RUN: not llvm-mc -triple=amdgcn -mcpu=gfx900  %s 2>&1 | FileCheck -check-prefix=GFX9-ERR --implicit-check-not=error: %s
+// RUN: not llvm-mc -triple=amdgcn -mcpu=gfx900  -mattr=+wavefrontsize64 %s -filetype=null 2>&1 | grep -v warning: | FileCheck -check-prefix=GFX9-ERR  -implicit-check-not=error: %s
+// RUN: not llvm-mc -triple=amdgcn -mcpu=gfx1010 -mattr=+wavefrontsize64 %s -filetype=null 2>&1 | grep -v warning: | FileCheck -check-prefix=GFX10-ERR -implicit-check-not=error: %s
----------------
jayfoad wrote:

@broxigarchen on my first attempt, update_mc_test_checks generated checks for some `warning:` lines _instead_ of the `error:` lines I really wanted. That is why I grep out all warnings here.

The warning lines looked like:
```
<unknown>:0: warning: Can't encode literal as exact 64-bit floating-point operand. Low 32-bits will be set to zero
```

https://github.com/llvm/llvm-project/pull/156038