53326ee0cf
Block sorting was assuming reducible CFG. Meaning we always had a best node to continue with. Irreducible CFG makes breaks this assumption, so the algorithm looped indefinitely because no node was a valid candidate. Fixes #116692 --------- Signed-off-by: Nathan Gauër <brioche@google.com>
52 lines
2.0 KiB
LLVM
52 lines
2.0 KiB
LLVM
; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv-unknown-vulkan-compute %s -o - -filetype=obj | spirv-val %}
|
|
; RUN: llc -mtriple=spirv-unknown-vulkan-compute -O0 %s -o - | FileCheck %s
|
|
|
|
target datalayout = "e-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-G1"
|
|
target triple = "spirv-unknown-vulkan-compute"
|
|
|
|
define internal spir_func void @main() #0 {
|
|
|
|
; CHECK: %[[#entry:]] = OpLabel
|
|
; CHECK: OpBranch %[[#while_cond:]]
|
|
entry:
|
|
%0 = call token @llvm.experimental.convergence.entry()
|
|
%idx = alloca i32, align 4
|
|
store i32 -1, ptr %idx, align 4
|
|
br label %while.cond
|
|
|
|
; CHECK: %[[#while_cond]] = OpLabel
|
|
; CHECK: OpBranchConditional %[[#cond:]] %[[#while_body:]] %[[#while_end:]]
|
|
while.cond:
|
|
%1 = call token @llvm.experimental.convergence.loop() [ "convergencectrl"(token %0) ]
|
|
%2 = load i32, ptr %idx, align 4
|
|
%cmp = icmp ne i32 %2, 0
|
|
br i1 %cmp, label %while.body, label %while.end
|
|
|
|
; CHECK: %[[#while_end]] = OpLabel
|
|
; CHECK-NEXT: OpReturn
|
|
while.end:
|
|
ret void
|
|
|
|
; CHECK: %[[#while_body]] = OpLabel
|
|
; CHECK: OpBranch %[[#while_cond]]
|
|
while.body:
|
|
%3 = call i32 @__hlsl_wave_get_lane_index() [ "convergencectrl"(token %1) ]
|
|
store i32 %3, ptr %idx, align 4
|
|
br label %while.cond
|
|
|
|
}
|
|
|
|
declare token @llvm.experimental.convergence.entry() #2
|
|
declare token @llvm.experimental.convergence.loop() #2
|
|
declare i32 @__hlsl_wave_get_lane_index() #3
|
|
|
|
attributes #0 = { convergent noinline norecurse nounwind optnone "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
|
|
attributes #1 = { convergent norecurse "hlsl.numthreads"="1,1,1" "hlsl.shader"="compute" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
|
|
attributes #2 = { convergent nocallback nofree nosync nounwind willreturn memory(none) }
|
|
attributes #3 = { convergent }
|
|
|
|
!llvm.module.flags = !{!0, !1}
|
|
|
|
!0 = !{i32 1, !"wchar_size", i32 4}
|
|
!1 = !{i32 4, !"dx.disable_optimizations", i32 1}
|