derek.holloway
7502bf64a4
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41 lines
1.3 KiB
LLVM
41 lines
1.3 KiB
LLVM
; RUN: opt -S -passes=place-safepoints < %s | FileCheck -check-prefixes=CHECK,WITHLDEXPF %s
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; RUN: opt -S -passes=place-safepoints -disable-builtin=ldexp < %s | FileCheck %s
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; Libcalls will not contain a safepoint poll, so check that we insert
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; a safepoint in a loop containing a libcall.
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declare double @ldexp(double %x, i32 %n) nounwind readnone
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define double @test_libcall(double %x) gc "statepoint-example" {
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; CHECK-LABEL: test_libcall
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entry:
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; CHECK: entry
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; CHECK-NEXT: call void @do_safepoint
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; CHECK-NEXT: br label %loop
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br label %loop
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loop:
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; CHECK: loop
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; CHECK-NEXT: %x_loop = phi double [ %x, %entry ], [ %x_exp, %loop ]
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; CHECK-NEXT: %x_exp = call double @ldexp(double %x_loop, i32 5)
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; CHECK-NEXT: %done = fcmp ogt double %x_exp, 1.500000e+00
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; WITHLDEXPF-NEXT: call void @do_safepoint
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; CHECK-NEXT: br
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%x_loop = phi double [ %x, %entry ], [ %x_exp, %loop ]
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%x_exp = call double @ldexp(double %x_loop, i32 5) nounwind readnone
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%done = fcmp ogt double %x_exp, 1.5
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br i1 %done, label %end, label %loop
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end:
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%x_end = phi double [%x_exp, %loop]
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ret double %x_end
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}
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; This function is inlined when inserting a poll.
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declare void @do_safepoint()
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define void @gc.safepoint_poll() {
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; CHECK-LABEL: gc.safepoint_poll
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entry:
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call void @do_safepoint()
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ret void
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}
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