[SystemZ] Change operand type for CKSM intrstruction.

[redstar]

The current definition of the CKSM instruction uses GR64 for the first operand. However, according to the Principles Of Operation the bits 0-31 of the first operand always remain unchanged. This PR changes the first operand to GR32 to model this.
This has no further implication as this instruction is not used during code generation.

[llvmbot]

@llvm/pr-subscribers-backend-systemz

Author: Kai Nacke (redstar)

Changes

The current definition of the CKSM instruction uses GR64 for the first operand. However, according to the Principles Of Operation the bits 0-31 of the first operand always remain unchanged. This PR changes the first operand to GR32 to model this.
This has no further implication as this instruction is not used during code generation.

---

Full diff: https://github.com/llvm/llvm-project/pull/129572.diff

1 Files Affected:

• (modified) llvm/lib/Target/SystemZ/SystemZInstrInfo.td (+1-1)

diff --git a/llvm/lib/Target/SystemZ/SystemZInstrInfo.td b/llvm/lib/Target/SystemZ/SystemZInstrInfo.td
index adfd0a19859c2..5b4a79395ca65 100644
--- a/llvm/lib/Target/SystemZ/SystemZInstrInfo.td
+++ b/llvm/lib/Target/SystemZ/SystemZInstrInfo.td
@@ -2183,7 +2183,7 @@ let mayLoad = 1, mayStore = 1, Defs = [CC, R0D, R1D, R2D, R3D, R5D],
 
 // Checksum.
 let mayLoad = 1, Defs = [CC] in
-  def CKSM : SideEffectBinaryMemMemRRE<"cksm", 0xB241, GR64, GR128>;
+  def CKSM : SideEffectBinaryMemMemRRE<"cksm", 0xB241, GR32, GR128>;
 
 // Compression call.
 let mayLoad = 1, mayStore = 1, Defs = [CC, R1D], Uses = [R0L, R1D] in

[uweigand]

LGTM, thanks!

[llvm-ci]

LLVM Buildbot has detected a new failure on builder openmp-offload-libc-amdgpu-runtime running on omp-vega20-1 while building llvm at step 7 "Add check check-offload".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/73/builds/13931

Here is the relevant piece of the build log for the reference

Step 7 (Add check check-offload) failure: 1200 seconds without output running [b'ninja', b'-j 32', b'check-offload'], attempting to kill
...
PASS: libomptarget :: x86_64-unknown-linux-gnu-LTO :: offloading/test_libc.cpp (998 of 1008)
PASS: libomptarget :: x86_64-unknown-linux-gnu-LTO :: offloading/bug49779.cpp (999 of 1008)
PASS: libomptarget :: x86_64-unknown-linux-gnu-LTO :: offloading/bug50022.cpp (1000 of 1008)
PASS: libomptarget :: x86_64-unknown-linux-gnu-LTO :: offloading/bug47654.cpp (1001 of 1008)
PASS: libomptarget :: x86_64-unknown-linux-gnu-LTO :: offloading/wtime.c (1002 of 1008)
PASS: libomptarget :: x86_64-unknown-linux-gnu :: offloading/bug49021.cpp (1003 of 1008)
PASS: libomptarget :: x86_64-unknown-linux-gnu :: offloading/std_complex_arithmetic.cpp (1004 of 1008)
PASS: libomptarget :: x86_64-unknown-linux-gnu-LTO :: offloading/complex_reduction.cpp (1005 of 1008)
PASS: libomptarget :: x86_64-unknown-linux-gnu-LTO :: offloading/bug49021.cpp (1006 of 1008)
PASS: libomptarget :: x86_64-unknown-linux-gnu-LTO :: offloading/std_complex_arithmetic.cpp (1007 of 1008)
command timed out: 1200 seconds without output running [b'ninja', b'-j 32', b'check-offload'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=1235.782368