llvm/test/Transforms/Inline/convergence-inline.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes='cgscc(inline)' -S %s | FileCheck %s

define void @nonconvergent_callee() alwaysinline {
; CHECK-LABEL: @nonconvergent_callee(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TOKEN:%.*]] = call token @llvm.experimental.convergence.anchor()
; CHECK-NEXT:    call void @f(i32 0) [ "convergencectrl"(token [[TOKEN]]) ]
; CHECK-NEXT:    ret void
;
entry:
  %token = call token @llvm.experimental.convergence.anchor()
  call void @f(i32 0) [ "convergencectrl"(token %token) ]
  ret void
}

define void @convergent_callee(i32 %v) convergent alwaysinline {
; CHECK-LABEL: @convergent_callee(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TOKEN:%.*]] = call token @llvm.experimental.convergence.entry()
; CHECK-NEXT:    call void @f(i32 [[V:%.*]]) [ "convergencectrl"(token [[TOKEN]]) ]
; CHECK-NEXT:    ret void
;
entry:
  %token = call token @llvm.experimental.convergence.entry()
  call void @f(i32 %v) [ "convergencectrl"(token %token) ]
  ret void
}

define void @test_nonconvergent() {
; CHECK-LABEL: @test_nonconvergent(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TOKEN_I:%.*]] = call token @llvm.experimental.convergence.anchor()
; CHECK-NEXT:    call void @f(i32 0) [ "convergencectrl"(token [[TOKEN_I]]) ]
; CHECK-NEXT:    ret void
;
entry:
  call void @nonconvergent_callee()
  ret void
}

define void @test_convergent_basic(i1 %cond) {
; CHECK-LABEL: @test_convergent_basic(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TOKEN:%.*]] = call token @llvm.experimental.convergence.anchor()
; CHECK-NEXT:    br i1 [[COND:%.*]], label [[THEN:%.*]], label [[END:%.*]]
; CHECK:       then:
; CHECK-NEXT:    call void @f(i32 0) [ "convergencectrl"(token [[TOKEN]]) ]
; CHECK-NEXT:    br label [[END]]
; CHECK:       end:
; CHECK-NEXT:    ret void
;
entry:
  %token = call token @llvm.experimental.convergence.anchor()
  br i1 %cond, label %then, label %end

then:
  call void @convergent_callee(i32 0) [ "convergencectrl"(token %token) ]
  br label %end

end:
  ret void
}

define void @test_convergent_no_token(i1 %cond) convergent {
; CHECK-LABEL: @test_convergent_no_token(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    call void @convergent_callee(i32 0)
; CHECK-NEXT:    ret void
;
entry:
  call void @convergent_callee(i32 0)
  ret void
}

define void @test_convergent_multiple() convergent {
; CHECK-LABEL: @test_convergent_multiple(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TOKEN:%.*]] = call token @llvm.experimental.convergence.entry()
; CHECK-NEXT:    call void @f(i32 0) [ "convergencectrl"(token [[TOKEN]]) ]
; CHECK-NEXT:    call void @f(i32 1) [ "convergencectrl"(token [[TOKEN]]) ]
; CHECK-NEXT:    call void @f(i32 2) [ "convergencectrl"(token [[TOKEN]]) ]
; CHECK-NEXT:    ret void
;
entry:
  %token = call token @llvm.experimental.convergence.entry()
  call void @convergent_callee(i32 0) [ "convergencectrl"(token %token) ]
  call void @convergent_callee(i32 1) [ "convergencectrl"(token %token) ]
  call void @convergent_callee(i32 2) [ "convergencectrl"(token %token) ]
  ret void
}

define void @test_convergent_loop(i1 %cond) {
; CHECK-LABEL: @test_convergent_loop(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TOKEN:%.*]] = call token @llvm.experimental.convergence.anchor()
; CHECK-NEXT:    br i1 [[COND:%.*]], label [[HDR:%.*]], label [[END:%.*]]
; CHECK:       hdr:
; CHECK-NEXT:    [[TOK_LOOP:%.*]] = call token @llvm.experimental.convergence.loop() [ "convergencectrl"(token [[TOKEN]]) ]
; CHECK-NEXT:    call void @f(i32 0) [ "convergencectrl"(token [[TOK_LOOP]]) ]
; CHECK-NEXT:    br i1 [[COND]], label [[HDR]], label [[END]]
; CHECK:       end:
; CHECK-NEXT:    ret void
;
entry:
  %token = call token @llvm.experimental.convergence.anchor()
  br i1 %cond, label %hdr, label %end

hdr:
  %tok.loop = call token @llvm.experimental.convergence.loop() [ "convergencectrl"(token %token) ]
  call void @convergent_callee(i32 0) [ "convergencectrl"(token %tok.loop) ]
  br i1 %cond, label %hdr, label %end

end:
  ret void
}

define void @make_indirect_call(ptr %f, i32 %x) convergent alwaysinline {
; CHECK-LABEL: @make_indirect_call(
; CHECK-NEXT:    [[TOKEN:%.*]] = call token @llvm.experimental.convergence.entry()
; CHECK-NEXT:    call void [[F:%.*]](i32 [[X:%.*]]) #[[ATTR2:[0-9]+]] [ "convergencectrl"(token [[TOKEN]]) ]
; CHECK-NEXT:    ret void
;
  %token = call token @llvm.experimental.convergence.entry()
  call void %f(i32 %x) convergent [ "convergencectrl"(token %token) ]
  ret void
}

define void @test_indirect_call() convergent {
; CHECK-LABEL: @test_indirect_call(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TOKEN:%.*]] = call token @llvm.experimental.convergence.entry()
; CHECK-NEXT:    call void @f(i32 0) [ "convergencectrl"(token [[TOKEN]]) ]
; CHECK-NEXT:    ret void
;
entry:
  %token = call token @llvm.experimental.convergence.entry()
  call void @make_indirect_call(ptr @convergent_callee, i32 0) [ "convergencectrl"(token %token) ]
  ret void
}

define void @recurse() convergent alwaysinline {
; CHECK-LABEL: @recurse(
; CHECK-NEXT:    [[TOKEN:%.*]] = call token @llvm.experimental.convergence.entry()
; CHECK-NEXT:    call void @recurse() [ "convergencectrl"(token [[TOKEN]]) ]
; CHECK-NEXT:    ret void
;
  %token = call token @llvm.experimental.convergence.entry()
  call void @recurse() [ "convergencectrl"(token %token) ]
  ret void
}

define void @test_recursive_call() convergent {
; CHECK-LABEL: @test_recursive_call(
; CHECK-NEXT:    [[TOKEN:%.*]] = call token @llvm.experimental.convergence.entry()
; CHECK-NEXT:    call void @recurse() [ "convergencectrl"(token [[TOKEN]]) ]
; CHECK-NEXT:    ret void
;
  %token = call token @llvm.experimental.convergence.entry()
  call void @recurse() [ "convergencectrl"(token %token) ]
  ret void
}

define i32 @outer_g(i32 %x) convergent alwaysinline {
; CHECK-LABEL: @outer_g(
; CHECK-NEXT:    [[TOKEN:%.*]] = call token @llvm.experimental.convergence.entry()
; CHECK-NEXT:    [[Y:%.*]] = call i32 @g(i32 [[X:%.*]]) [ "convergencectrl"(token [[TOKEN]]) ]
; CHECK-NEXT:    ret i32 [[Y]]
;
  %token = call token @llvm.experimental.convergence.entry()
  %y = call i32 @g(i32 %x) [ "convergencectrl"(token %token) ]
  ret i32 %y
}

define void @test_two_calls() convergent {
; CHECK-LABEL: @test_two_calls(
; CHECK-NEXT:    [[TOKEN:%.*]] = call token @llvm.experimental.convergence.entry()
; CHECK-NEXT:    [[Y_I:%.*]] = call i32 @g(i32 23) [ "convergencectrl"(token [[TOKEN]]) ]
; CHECK-NEXT:    call void @f(i32 [[Y_I]]) [ "convergencectrl"(token [[TOKEN]]) ]
; CHECK-NEXT:    ret void
;
  %token = call token @llvm.experimental.convergence.entry()
  %x = call i32 @outer_g(i32 23) [ "convergencectrl"(token %token) ]
  call void @convergent_callee(i32 %x) [ "convergencectrl"(token %token) ]
  ret void
}

define i32 @token_not_first(i32 %x) convergent alwaysinline {
; CHECK-LABEL: @token_not_first(
; CHECK-NEXT:    {{%.*}} = alloca ptr, align 8
; CHECK-NEXT:    [[TOKEN:%.*]] = call token @llvm.experimental.convergence.entry()
; CHECK-NEXT:    [[Y:%.*]] = call i32 @g(i32 [[X:%.*]]) [ "convergencectrl"(token [[TOKEN]]) ]
; CHECK-NEXT:    ret i32 [[Y]]
;
  %p = alloca ptr, align 8
  %token = call token @llvm.experimental.convergence.entry()
  %y = call i32 @g(i32 %x) [ "convergencectrl"(token %token) ]
  ret i32 %y
}

define void @test_token_not_first() convergent {
; CHECK-LABEL: @test_token_not_first(
; CHECK-NEXT:    [[TOKEN:%.*]] = call token @llvm.experimental.convergence.entry()
; CHECK-NEXT:    {{%.*}} = call i32 @g(i32 23) [ "convergencectrl"(token [[TOKEN]]) ]
; CHECK-NEXT:    ret void
;
  %token = call token @llvm.experimental.convergence.entry()
  %x = call i32 @token_not_first(i32 23) [ "convergencectrl"(token %token) ]
  ret void
}

declare void @f(i32) convergent
declare i32 @g(i32) convergent

declare token @llvm.experimental.convergence.entry()
declare token @llvm.experimental.convergence.anchor()
declare token @llvm.experimental.convergence.loop()