File: dead-machine-elim-after-dead-lane.ll

package info (click to toggle)
llvm-toolchain-17 1%3A17.0.6-22
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,799,624 kB
  • sloc: cpp: 6,428,607; ansic: 1,383,196; asm: 793,408; python: 223,504; objc: 75,364; f90: 60,502; lisp: 33,869; pascal: 15,282; sh: 9,684; perl: 7,453; ml: 4,937; awk: 3,523; makefile: 2,889; javascript: 2,149; xml: 888; fortran: 619; cs: 573
file content (28 lines) | stat: -rw-r--r-- 776 bytes parent folder | download | duplicates (4) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 
; RUN: llc -march=amdgcn -verify-machineinstrs %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() {
entry:
  switch i8 undef, label %foo.exit [
    i8 4, label %sw.bb4
    i8 10, label %sw.bb10
  ]

sw.bb4:
  %x = load i64, ptr addrspace(1) undef, align 8
  %c = sitofp i64 %x to float
  %v = insertelement <2 x float> <float undef, float 0.000000e+00>, float %c, i32 0
  br label %foo.exit

sw.bb10:
  unreachable

foo.exit:
  %agg = phi <2 x float> [ %v, %sw.bb4 ], [ zeroinitializer, %entry ]
  %s = extractelement <2 x float> %agg, i32 1
  store float %s, ptr addrspace(1) undef, align 4
  ret void
}