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

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,998,520 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (28 lines) | stat: -rw-r--r-- 778 bytes parent folder | download | duplicates (5) 
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 -mtriple=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
}