[AMDGPU] Precommit test for issue in amdgpu-rewrite-agpr-copy-mfma, #168609

hjagasiaAMD · 2025-11-18T21:45:35Z

which reassigns scale operand in vgpr_32 register to agpr_32, not permitted by instruction format. Reduced from ck.

llvmbot · 2025-11-18T21:46:11Z

@llvm/pr-subscribers-backend-amdgpu

Author: None (hjagasiaAMD)

Changes

which reassigns scale operand in vgpr_32 register to agpr_32, not permitted by instruction format. Reduced from ck.

Patch is 490.57 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/168609.diff

1 Files Affected:

(added) llvm/test/CodeGen/AMDGPU/rewrite-vgpr-mfma-scale-to-agpr.mir (+6793)

diff --git a/llvm/test/CodeGen/AMDGPU/rewrite-vgpr-mfma-scale-to-agpr.mir b/llvm/test/CodeGen/AMDGPU/rewrite-vgpr-mfma-scale-to-agpr.mir
new file mode 100644
index 0000000000000..d8bc90275d6b4
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/rewrite-vgpr-mfma-scale-to-agpr.mir
@@ -0,0 +1,6793 @@
+# RUN: not llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx950 -run-pass=greedy,amdgpu-rewrite-agpr-copy-mfma -verify-machineinstrs -o - %s 2>&1 | FileCheck %s
+# CHECK: Illegal virtual register for instruction
+# CHECK: Expected a VGPR_32 register, but got a AGPR_32 register
+
+# Test for issue in amdgpu-rewrite-agpr-copy-mfma, which reassigns scale operand
+# in vgpr_32 register to agpr_32, not permitted by instruction format.
+--- |
+  define amdgpu_kernel void @test() #0 {
+  entry:
+    unreachable
+  }
+  attributes #0 = { "amdgpu-flat-work-group-size"="1,256" }
+...
+---
+name:            test
+tracksRegLiveness: true
+registers:
+  - { id: 0, class: sreg_64, preferred-register: '', flags: [  ] }
+  - { id: 1, class: sgpr_128, preferred-register: '', flags: [  ] }
+  - { id: 2, class: sreg_32, preferred-register: '', flags: [  ] }
+  - { id: 3, class: sreg_64, preferred-register: '', flags: [  ] }
+  - { id: 4, class: sreg_32, preferred-register: '', flags: [  ] }
+  - { id: 5, class: sreg_32, preferred-register: '', flags: [  ] }
+  - { id: 6, class: sreg_32, preferred-register: '', flags: [  ] }
+  - { id: 7, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 8, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 9, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 10, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 11, class: sreg_32, preferred-register: '', flags: [  ] }
+  - { id: 12, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 13, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 14, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 15, class: sgpr_128, preferred-register: '', flags: [  ] }
+  - { id: 16, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 17, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 18, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 19, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 20, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 21, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 22, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 23, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 24, class: sreg_64, preferred-register: '', flags: [  ] }
+  - { id: 25, class: sreg_64, preferred-register: '', flags: [  ] }
+  - { id: 26, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 27, class: sreg_32, preferred-register: '', flags: [  ] }
+  - { id: 28, class: sreg_32, preferred-register: '', flags: [  ] }
+  - { id: 29, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 30, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 31, class: sreg_32, preferred-register: '', flags: [  ] }
+  - { id: 32, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 33, class: sreg_32, preferred-register: '', flags: [  ] }
+  - { id: 34, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 35, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 36, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 37, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 38, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 39, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 40, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 41, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 42, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 43, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 44, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 45, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 46, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 47, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 48, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 49, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 50, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 51, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 52, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 53, class: sreg_32, preferred-register: '', flags: [  ] }
+  - { id: 54, class: sreg_32, preferred-register: '', flags: [  ] }
+  - { id: 55, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 56, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 57, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 58, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 59, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 60, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 61, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 62, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 63, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 64, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 65, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 66, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 67, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 68, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 69, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 70, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 71, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 72, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 73, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 74, class: sreg_32, preferred-register: '', flags: [  ] }
+  - { id: 75, class: sreg_32, preferred-register: '', flags: [  ] }
+  - { id: 76, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 77, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 78, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 79, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 80, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 81, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 82, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 83, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 84, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 85, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 86, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 87, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 88, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 89, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 90, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 91, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 92, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 93, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 94, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 95, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 96, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 97, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 98, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 99, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 100, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 101, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 102, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 103, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 104, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 105, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 106, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 107, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 108, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 109, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 110, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 111, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 112, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 113, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 114, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 115, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 116, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 117, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 118, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 119, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 120, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 121, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 122, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 123, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 124, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 125, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 126, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 127, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 128, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 129, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 130, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 131, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 132, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 133, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 134, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 135, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 136, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 137, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 138, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 139, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 140, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 141, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 142, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 143, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 144, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 145, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 146, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 147, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 148, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 149, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 150, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 151, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 152, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 153, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 154, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 155, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 156, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 157, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 158, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 159, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 160, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 161, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 162, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 163, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 164, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 165, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 166, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 167, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 168, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 169, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 170, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 171, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 172, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 173, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 174, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 175, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 176, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 177, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 178, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 179, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 180, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 181, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 182, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 183, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 184, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 185, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 186, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 187, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 188, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 189, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 190, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 191, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 192, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 193, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 194, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 195, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 196, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 197, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 198, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 199, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 200, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 201, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 202, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 203, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 204, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 205, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 206, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 207, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 208, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 209, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 210, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 211, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 212, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 213, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 214, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 215, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 216, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 217, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 218, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 219, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 220, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 221, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 222, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 223, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 224, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 225, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 226, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 227, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 228, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 229, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 230, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 231, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 232, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 233, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 234, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 235, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 236, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 237, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 238, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 239, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 240, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 241, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 242, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 243, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 244, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 245, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 246, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 247, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 248, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 249, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 250, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 251, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 252, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 253, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 254, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 255, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 256, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 257, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 258, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 259, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 260, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 261, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 262, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 263, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 264, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 265, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 266, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 267, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 268, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 269, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 270, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 271, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 272, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 273, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 274, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 275, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 276, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 277, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 278, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 279, class: vgpr_32, preferred-register: '', flags: [  ] }
+  - { id: 280, class: vgpr_32, preferred-register: '', f...
[truncated]

llvm/test/CodeGen/AMDGPU/rewrite-vgpr-mfma-scale-to-agpr.mir

github-actions · 2025-11-18T22:32:07Z

🐧 Linux x64 Test Results

186428 tests passed
4868 tests skipped

arsenm

Test is still really big, but it's very difficult to shrink these. Can at least fix a few of the weird reduction artifacts

arsenm · 2025-11-19T22:45:38Z

llvm/test/CodeGen/AMDGPU/rewrite-vgpr-mfma-scale-to-agpr.mir

+# in vgpr_32 register to agpr_32, not permitted by instruction format.
+--- |
+  define amdgpu_kernel void @test() #0 {
+  entry:


Suggested change

entry:

arsenm · 2025-11-19T22:46:17Z

llvm/test/CodeGen/AMDGPU/rewrite-vgpr-mfma-scale-to-agpr.mir

+    %152:vreg_128_align2 = COPY %82
+    %153:vreg_128_align2 = V_MFMA_SCALE_F32_16X16X128_F8F6F4_f4_f4_vgprcd_e64 undef %111, undef %14, %149, 4, 4, undef %35, undef %28, 8, 12, implicit $mode, implicit $exec
+    %20:av_128_align2 = IMPLICIT_DEF
+    %154:vreg_128_align2 = V_MFMA_SCALE_F32_16X16X128_F8F6F4_f4_f4_vgprcd_e64 undef %111, undef %14, %151, 4, 4, %35, undef %101, 8, 8, implicit $mode, implicit $exec


I assume this came out of llvm-reduce? Can you fix all of these undef flags on operands that really do have definitions?

llvm/test/CodeGen/AMDGPU/rewrite-vgpr-mfma-scale-to-agpr.mir

Co-authored-by: Matt Arsenault <arsenm2@gmail.com>

[AMDGPU] Precommit test for issue in amdgpu-rewrite-agpr-copy-mfma,

c24e90f

which reassigns scale operand in vgpr_32 register to agpr_32, not permitted by instruction format. Reduced from ck.

llvmbot added the backend:AMDGPU label Nov 18, 2025

arsenm reviewed Nov 18, 2025

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llvm/test/CodeGen/AMDGPU/rewrite-vgpr-mfma-scale-to-agpr.mir Outdated Show resolved Hide resolved

Drop the registers section and compact the register numbers

6e8a2a8

ronlieb self-requested a review November 19, 2025 16:23

hjagasiaAMD requested a review from arsenm November 19, 2025 20:05

arsenm reviewed Nov 19, 2025

View reviewed changes

Smaller test

72e2e40

hjagasiaAMD requested a review from arsenm November 20, 2025 15:23

ronlieb approved these changes Nov 20, 2025

View reviewed changes

arsenm approved these changes Nov 20, 2025

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arsenm reviewed Nov 20, 2025

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llvm/test/CodeGen/AMDGPU/rewrite-vgpr-mfma-scale-to-agpr.mir Outdated Show resolved Hide resolved

hjagasiaAMD and others added 2 commits November 20, 2025 14:36

Update llvm/test/CodeGen/AMDGPU/rewrite-vgpr-mfma-scale-to-agpr.mir

a5fbab7

Co-authored-by: Matt Arsenault <arsenm2@gmail.com>

Merge branch 'main' into agpr-copy-mfma-bugfix

55b6935

arsenm approved these changes Nov 20, 2025

View reviewed changes

ronlieb merged commit 244b230 into llvm:main Nov 20, 2025
8 of 9 checks passed

hjagasiaAMD deleted the agpr-copy-mfma-bugfix branch November 20, 2025 21:44

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[AMDGPU] Precommit test for issue in amdgpu-rewrite-agpr-copy-mfma, #168609

[AMDGPU] Precommit test for issue in amdgpu-rewrite-agpr-copy-mfma, #168609

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[AMDGPU] Precommit test for issue in amdgpu-rewrite-agpr-copy-mfma, #168609

[AMDGPU] Precommit test for issue in amdgpu-rewrite-agpr-copy-mfma, #168609

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