24 lines
645 B
LLVM
24 lines
645 B
LLVM
|
; RUN: llc < %s | FileCheck %s
|
||
|
|
target triple = "nvptx64-nvidia-cuda"
|
||
|
|
|
||
|
|
declare void @llvm.nvvm.barrier0()
|
||
|
|
|
||
|
|
; Load a value, then syncthreads. Branch, and use the loaded value only on one
|
||
|
|
; side of the branch. The load shouldn't be sunk beneath the call, because
|
||
|
|
; syncthreads is modeled as maystore.
|
||
|
|
define i32 @f(i32 %x, i32* %ptr, i1 %cond) {
|
||
|
|
Start:
|
||
|
|
; CHECK: ld.u32
|
||
|
|
%ptr_val = load i32, i32* %ptr
|
||
|
|
; CHECK: bar.sync
|
||
|
|
call void @llvm.nvvm.barrier0()
|
||
|
|
br i1 %cond, label %L1, label %L2
|
||
|
|
L1:
|
||
|
|
%ptr_val2 = add i32 %ptr_val, 100
|
||
|
|
br label %L2
|
||
|
|
L2:
|
||
|
|
%v4 = phi i32 [ %x, %Start ], [ %ptr_val2, %L1 ]
|
||
|
|
%v5 = add i32 %v4, 1000
|
||
|
|
ret i32 %v5
|
||
|
|
}
|