derek.holloway
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45 lines
1.4 KiB
LLVM
45 lines
1.4 KiB
LLVM
; RUN: opt -S -passes=spirv-merge-region-exits -mtriple=spirv-unknown-vulkan-compute < %s | FileCheck %s
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; A loop with two distinct exit targets (exit_a, exit_b). The pass
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; should merge them into a single new.exit block dispatched via a
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; switch on a stored discriminator value.
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define spir_func i32 @two_exits(i1 %ca, i1 %cb) #0 {
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; CHECK-LABEL: define spir_func i32 @two_exits(
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; CHECK: entry:
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; CHECK: [[REG:%.*]] = alloca i32
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; CHECK: loop:
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; CHECK: store i32 {{.*}}, ptr [[REG]]
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; CHECK: br i1 %ca, label %new.exit, label %body
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; CHECK: body:
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; CHECK: store i32 {{.*}}, ptr [[REG]]
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; CHECK: br i1 %cb, label %new.exit, label %loop
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; CHECK: new.exit:
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; CHECK: [[V:%.*]] = load i32, ptr [[REG]]
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; CHECK: switch i32 [[V]], label %exit_a [
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; CHECK: i32 {{.*}}, label %exit_b
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; CHECK: ]
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entry:
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%t0 = call token @llvm.experimental.convergence.entry()
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br label %loop
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loop:
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%t1 = call token @llvm.experimental.convergence.loop() [ "convergencectrl"(token %t0) ]
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br i1 %ca, label %exit_a, label %body
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body:
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br i1 %cb, label %exit_b, label %loop
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exit_a:
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ret i32 1
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exit_b:
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ret i32 2
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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 }
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attributes #1 = { convergent nocallback nofree nosync nounwind willreturn memory(none) }
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