https://github.com/arsenm created
https://github.com/llvm/llvm-project/pull/131106
Before the dawn of civilization, instructions were printed in all
caps using the raw tablegen pseudo-names. This -NOT check was looking
for that, instead of the actual ISA output. Just switch to using generated
checks. Also replace a use of undef.
>From da8190ed5eb0f798d53907ed7a39320f71814389 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <matthew.arsena...@amd.com>
Date: Thu, 13 Mar 2025 16:05:26 +0700
Subject: [PATCH] AMDGPU: Fix broken negative test from ancient times
Before the dawn of civilization, instructions were printed in all
caps using the raw tablegen pseudo-names. This -NOT check was looking
for that, instead of the actual ISA output. Just switch to using generated
checks. Also replace a use of undef.
---
.../dead-machine-elim-after-dead-lane.ll | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/llvm/test/CodeGen/AMDGPU/dead-machine-elim-after-dead-lane.ll
b/llvm/test/CodeGen/AMDGPU/dead-machine-elim-after-dead-lane.ll
index 9ce0235fdcb18..d616fecfdc1ff 100644
--- a/llvm/test/CodeGen/AMDGPU/dead-machine-elim-after-dead-lane.ll
+++ b/llvm/test/CodeGen/AMDGPU/dead-machine-elim-after-dead-lane.ll
@@ -1,12 +1,22 @@
-; RUN: llc -mtriple=amdgcn -verify-machineinstrs %s -o - | FileCheck %s
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
UTC_ARGS: --version 5
+; RUN: llc -mtriple=amdgcn -mcpu=tahiti %s -o - | FileCheck %s
-; CHECK-LABEL: foo
-; CHECK-NOT: BUFFER_LOAD_DWORDX2_OFFSET
; After dead code elimination, that buffer load should be eliminated finally
; after dead lane detection.
define amdgpu_kernel void @foo() {
+; CHECK-LABEL: foo:
+; CHECK: ; %bb.0: ; %entry
+; CHECK-NEXT: s_cbranch_execnz .LBB0_2
+; CHECK-NEXT: ; %bb.1: ; %LeafBlock1
+; CHECK-NEXT: .LBB0_2: ; %foo.exit
+; CHECK-NEXT: s_mov_b32 s3, 0xf000
+; CHECK-NEXT: s_mov_b32 s2, -1
+; CHECK-NEXT: v_mov_b32_e32 v0, 0
+; CHECK-NEXT: buffer_store_dword v0, off, s[0:3], 0
+; CHECK-NEXT: s_endpgm
+; CHECK-NEXT: ; %bb.3: ; %sw.bb10
entry:
- switch i8 undef, label %foo.exit [
+ switch i8 poison, label %foo.exit [
i8 4, label %sw.bb4
i8 10, label %sw.bb10
]
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