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The IR verifier will fail if there are any convergent calls without a convergencectrl bundle, if there are any convergencectrl bundles. With the current verifier rules, we would need to drop all the instances of convergencectrl in the function as a set, and strip all the convergence token intrinsics. As such, I think it would be more appropriate to have a separate convergence reduction pass.
37 lines
2.0 KiB
LLVM
37 lines
2.0 KiB
LLVM
; Check that invalid reductions aren't introduced by deleting
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; convergencectrl bundles in convergent functions
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;
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; RUN: llvm-reduce --abort-on-invalid-reduction --delta-passes=operand-bundles --test FileCheck --test-arg --check-prefixes=CHECK,INTERESTING --test-arg %s --test-arg --input-file %s -o %t
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; RUN: FileCheck --check-prefixes=CHECK,RESULT %s < %t
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; CHECK-LABEL: define float @convergentctrl_one_interesting(
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; INTERESTING: %interesting = call float @convergent.extern.func(
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; RESULT: %entry.token = call token @llvm.experimental.convergence.entry()
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; RESULT: %interesting = call float @convergent.extern.func(float %x) [ "convergencectrl"(token %entry.token) ]
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; RESULT: %boring = call float @convergent.extern.func(float %x) [ "convergencectrl"(token %entry.token) ]
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define float @convergentctrl_one_interesting(float %x, float %y) #0 {
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%entry.token = call token @llvm.experimental.convergence.entry()
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%interesting = call float @convergent.extern.func(float %x) [ "convergencectrl"(token %entry.token) ]
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%boring = call float @convergent.extern.func(float %x) [ "convergencectrl"(token %entry.token) ]
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%add = fadd float %interesting, %boring
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ret float %add
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}
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; In theory we could remove the bundle here, since all convergencectrl
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; in the function will be removed.
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; CHECK-LABEL: define float @convergentctrl_can_remove_all(
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; RESULT: %entry.token = call token @llvm.experimental.convergence.entry()
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; RESULT: %val = call float @convergent.extern.func(float %x) [ "convergencectrl"(token %entry.token) ]
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define float @convergentctrl_can_remove_all(float %x, float %y) #0 {
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%entry.token = call token @llvm.experimental.convergence.entry()
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%val = call float @convergent.extern.func(float %x) [ "convergencectrl"(token %entry.token) ]
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ret float %val
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}
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declare float @convergent.extern.func(float) #0
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declare token @llvm.experimental.convergence.entry() #1
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attributes #0 = { convergent }
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attributes #1 = { convergent nocallback nofree nosync nounwind willreturn memory(none) }
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