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>
123 lines
4.3 KiB
LLVM
123 lines
4.3 KiB
LLVM
; RUN: llc -mtriple=spirv-unknown-vulkan-compute -O0 %s -o - | FileCheck %s --match-full-lines
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; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv-unknown-vulkan-compute %s -o - -filetype=obj | spirv-val %}
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target datalayout = "e-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-G1"
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target triple = "spirv-unknown-vulkan1.3-compute"
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define spir_func noundef i32 @_Z3foov() #0 {
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entry:
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%0 = call token @llvm.experimental.convergence.entry()
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ret i32 1
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}
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define internal spir_func void @main() #2 {
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; CHECK: %[[#entry:]] = OpLabel
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; CHECK: OpBranch %[[#do_header:]]
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entry:
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%0 = call token @llvm.experimental.convergence.entry()
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%var = alloca i32, align 4
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br label %do_header
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; Here a the loop header had to be split in two:
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; - 1 header for the loop
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; - 1 header for the condition.
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; CHECK: %[[#do_header:]] = OpLabel
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; CHECK: OpLoopMerge %[[#do_merge:]] %[[#do_latch:]] None
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; CHECK: OpBranch %[[#new_header:]]
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; CHECK: %[[#new_header]] = OpLabel
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; CHECK: OpSelectionMerge %[[#if_merge:]] None
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; CHECK: OpBranchConditional %[[#]] %[[#if_then:]] %[[#if_end:]]
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do_header:
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%1 = call token @llvm.experimental.convergence.loop() [ "convergencectrl"(token %0) ]
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store i32 0, ptr %var
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br i1 true, label %if.then, label %if.end
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; CHECK: %[[#if_end]] = OpLabel
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; CHECK: OpBranch %[[#if_merge]]
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if.end:
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store i32 0, ptr %var
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br label %do_latch
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; CHECK: %[[#if_then]] = OpLabel
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; CHECK: OpBranch %[[#if_merge]]
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if.then:
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store i32 0, ptr %var
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br label %do_latch
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; CHECK: %[[#if_merge]] = OpLabel
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; CHECK: OpBranchConditional %[[#]] %[[#do_latch]] %[[#do_merge]]
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; CHECK: %[[#do_merge]] = OpLabel
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; CHECK: OpBranch %[[#do2_header:]]
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do.end:
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store i32 0, ptr %var
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br label %do2_header
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; CHECK: %[[#do2_header]] = OpLabel
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; CHECK: OpLoopMerge %[[#do2_merge:]] %[[#do2_continue:]] None
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; CHECK: OpBranch %[[#do3_header:]]
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do2_header:
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%6 = call token @llvm.experimental.convergence.loop() [ "convergencectrl"(token %0) ]
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store i32 0, ptr %var
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br label %do3_header
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; CHECK: %[[#do3_header]] = OpLabel
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; CHECK: OpLoopMerge %[[#do3_merge:]] %[[#do3_continue:]] None
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; CHECK: OpBranch %[[#do3_body:]]
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do3_header:
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%8 = call token @llvm.experimental.convergence.loop() [ "convergencectrl"(token %6) ]
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store i32 0, ptr %var
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br label %do3_continue
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; CHECK: %[[#do3_body]] = OpLabel
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; CHECK: OpBranchConditional %[[#]] %[[#do3_continue]] %[[#do3_merge]]
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; CHECK: %[[#do3_merge]] = OpLabel
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; CHECK: OpBranch %[[#do2_new_latch:]]
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do3_merge:
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store i32 0, ptr %var
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br label %do2_continue
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; CHECK: %[[#do2_new_latch]] = OpLabel
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; CHECK: OpBranchConditional %[[#]] %[[#do2_continue]] %[[#do2_merge]]
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; CHECK: %[[#do2_merge]] = OpLabel
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; CHECK: OpReturn
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do2_merge:
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ret void
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; CHECK: %[[#do2_continue]] = OpLabel
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; CHECK: OpBranch %[[#do2_header]]
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do2_continue:
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store i32 0, ptr %var
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br i1 true, label %do2_header, label %do2_merge
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; CHECK: %[[#do3_continue]] = OpLabel
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; CHECK: OpBranch %[[#do3_header]]
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do3_continue:
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store i32 0, ptr %var
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br i1 true, label %do3_header, label %do3_merge
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; CHECK: %[[#do_latch]] = OpLabel
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; CHECK: OpBranch %[[#do_header]]
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do_latch:
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store i32 0, ptr %var
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br i1 true, label %do_header, label %do.end
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}
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declare token @llvm.experimental.convergence.entry() #1
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declare token @llvm.experimental.convergence.loop() #1
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attributes #0 = { convergent noinline nounwind optnone "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
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attributes #1 = { convergent nocallback nofree nosync nounwind willreturn memory(none) }
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attributes #2 = { convergent noinline norecurse nounwind optnone "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
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attributes #3 = { convergent norecurse "frame-pointer"="all" "hlsl.numthreads"="1,1,1" "hlsl.shader"="compute" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
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!llvm.module.flags = !{!0, !1, !2}
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!0 = !{i32 1, !"wchar_size", i32 4}
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!1 = !{i32 4, !"dx.disable_optimizations", i32 1}
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!2 = !{i32 7, !"frame-pointer", i32 2}
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