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
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
; RUN: opt %loadPolly -polly-codegen-ppcg -polly-invariant-load-hoisting \
; RUN: -S < %s | \
; RUN: FileCheck -check-prefix=HOST-IR %s
; RUN: opt %loadPolly -disable-output -polly-acc-dump-kernel-ir \
; RUN: -polly-codegen-ppcg -polly-scops \
; RUN: -polly-invariant-load-hoisting < %s | FileCheck -check-prefix=KERNEL-IR %s
; REQUIRES: pollyacc
; Verify that invariant loads used in a kernel statement are correctly forwarded
; as subtree value to the GPU kernel.
; HOST-IR: store float %polly.access.p.load, float* %invariant.preload.s2a, align 4
; KERNEL-IR: define ptx_kernel void @FUNC_foo_SCOP_0_KERNEL_2({{.*}}i8 addrspace(1)* %MemRef_indvar2f__phi{{.*}})
; KERNEL-IR: %indvar2f.phiops.reload = load float, float* %indvar2f.phiops, align 4
; KERNEL-IR: store float %indvar2f.phiops.reload, float addrspace(1)* %polly.access.MemRef_A, align 4
; FIXME: store float %indvar2f.phiops.reload, float* %indvar2f.phiops, align 4
; For some reason the above instruction is emitted that stores back to the addess it was just loaded from.
define void @foo(float* %A, float* %p) {
entry:
br label %loop
loop:
%indvar = phi i64 [0, %entry], [%indvar.next, %loop]
%indvar.next = add i64 %indvar, 1
%invariant = load float, float* %p
%ptr = getelementptr float, float* %A, i64 %indvar
store float 42.0, float* %ptr
%cmp = icmp sle i64 %indvar, 1024
br i1 %cmp, label %loop, label %anotherloop
anotherloop:
%indvar2 = phi i64 [0, %loop], [%indvar2.next, %anotherloop]
%indvar2f = phi float [%invariant, %loop], [%indvar2f, %anotherloop]
%indvar2.next = add i64 %indvar2, 1
store float %indvar2f, float* %A
%cmp2 = icmp sle i64 %indvar2, 1024
br i1 %cmp2, label %anotherloop, label %end
end:
ret void
}
|
