You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
61 lines
2.2 KiB
61 lines
2.2 KiB
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 -verify-machineinstrs -stop-after=amdgpu-isel -o - %s | FileCheck -check-prefix=GCN %s
|
|
define void @test() #1 {
|
|
; Clean up the unreachable blocks introduced with LowerSwitch pass.
|
|
; This test ensures that, in the pass flow, UnreachableBlockElim pass
|
|
; follows the LowerSwitch. Otherwise, this testcase will crash
|
|
; immediately after the instruction selection due to the incomplete
|
|
; PHI node in an MBB whose incoming values were never codegenerated.
|
|
;
|
|
; GCN-LABEL: name: test
|
|
; GCN: bb.{{[0-9]+}}.entry:
|
|
; GCN: bb.{{[0-9]+}}.entry.true.blk:
|
|
; GCN: bb.{{[0-9]+}}.entry.false.blk:
|
|
; GCN: bb.{{[0-9]+}}.switch.blk:
|
|
|
|
; GCN-NOT: bb.{{[0-9]+}}.preheader.blk
|
|
; GCN-NOT: bb.{{[0-9]+}}.pre.false.blk:
|
|
; GCN-NOT: bb.{{[0-9]+}}.unreach.blk:
|
|
; GCN-NOT: PHI
|
|
|
|
; GCN: bb.{{[0-9]+}}.exit:
|
|
entry:
|
|
%idx = tail call i32 @llvm.amdgcn.workitem.id.x() #0
|
|
br i1 undef, label %entry.true.blk, label %entry.false.blk
|
|
|
|
entry.true.blk: ; preds = %entry
|
|
%exit.cmp = icmp ult i32 %idx, 3
|
|
br i1 %exit.cmp, label %switch.blk, label %exit
|
|
|
|
entry.false.blk: ; preds = %entry
|
|
unreachable
|
|
|
|
switch.blk: ; preds = %entry.true.blk
|
|
switch i32 %idx, label %preheader.blk [
|
|
i32 0, label %exit
|
|
i32 1, label %exit
|
|
i32 2, label %exit
|
|
]
|
|
|
|
preheader.blk: ; preds = %switch.blk
|
|
%pre.exit = icmp ult i32 %idx, 5
|
|
br i1 %pre.exit, label %unreach.blk, label %pre.false.blk
|
|
|
|
pre.false.blk: ; preds = %preheader.blk
|
|
%call.pre.false = tail call i32 @func(i32 %idx) #0
|
|
br label %unreach.blk
|
|
|
|
unreach.blk: ; preds = %preheader.blk, %pre.false.blk
|
|
%phi.val = phi i32 [ %call.pre.false, %pre.false.blk ], [ undef, %preheader.blk ]
|
|
store i32 %phi.val, i32* undef
|
|
unreachable
|
|
|
|
exit: ; preds = %switch.blk
|
|
ret void
|
|
}
|
|
|
|
declare i32 @llvm.amdgcn.workitem.id.x() #0
|
|
declare i32 @func(i32)#0
|
|
|
|
attributes #0 = { nounwind readnone }
|
|
attributes #1 = { nounwind }
|