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

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (28 lines) | stat: -rw-r--r-- 780 bytes parent folder | download | duplicates (9) 
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, i64 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, float addrspace(1)* undef, align 4
  ret void
}