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659464b45b
TargetMachine::shouldAssumeDSOLocal currently implies dso_local for such definitions. Adding explicit dso_local makes these tests align with the clang -fpic behavior and allow the removal of the TargetMachine::shouldAssumeDSOLocal special case. Rewrite preemption.ll to dsolocal-static.ll and dsolocal-pic.ll, and add "PIC Level" metadata.
97 lines
3.3 KiB
LLVM
97 lines
3.3 KiB
LLVM
; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu \
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; RUN: -ppc-asm-full-reg-names -ppc-vsr-nums-as-vr < %s | FileCheck %s
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; The tests check the behavior of the tail call decision when the callee is speculatable.
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; Callee should be tail called in this function since it is at a tail call position.
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define dso_local double @speculatable_callee_return_use_only (double* nocapture %res, double %a) #0 {
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; CHECK-LABEL: speculatable_callee_return_use_only:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: b callee
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entry:
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%value = tail call double @callee(double %a) #2
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ret double %value
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}
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; Callee should not be tail called since it is not at a tail call position.
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define dso_local void @speculatable_callee_non_return_use_only (double* nocapture %res, double %a) #0 {
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; CHECK-LABEL: speculatable_callee_non_return_use_only:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: mflr r0
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; CHECK-NEXT: std r30, -16(r1) # 8-byte Folded Spill
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; CHECK-NEXT: std r0, 16(r1)
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; CHECK-NEXT: stdu r1, -48(r1)
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; CHECK-NEXT: mr r30, r3
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; CHECK-NEXT: bl callee
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; CHECK-NEXT: stfdx f1, 0, r30
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; CHECK-NEXT: addi r1, r1, 48
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; CHECK-NEXT: ld r0, 16(r1)
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; CHECK-NEXT: ld r30, -16(r1) # 8-byte Folded Reload
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; CHECK-NEXT: mtlr r0
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; CHECK-NEXT: blr
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entry:
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%call = tail call double @callee(double %a) #2
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store double %call, double* %res, align 8
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ret void
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}
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; Callee should not be tail called since it is not at a tail call position.
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define dso_local double @speculatable_callee_multi_use (double* nocapture %res, double %a) #0 {
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; CHECK-LABEL: speculatable_callee_multi_use:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: mflr r0
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; CHECK-NEXT: std r30, -16(r1) # 8-byte Folded Spill
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; CHECK-NEXT: std r0, 16(r1)
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; CHECK-NEXT: stdu r1, -48(r1)
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; CHECK-NEXT: mr r30, r3
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; CHECK-NEXT: bl callee
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; CHECK-NEXT: stfdx f1, 0, r30
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; CHECK-NEXT: addi r1, r1, 48
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; CHECK-NEXT: ld r0, 16(r1)
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; CHECK-NEXT: ld r30, -16(r1) # 8-byte Folded Reload
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; CHECK-NEXT: mtlr r0
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; CHECK-NEXT: blr
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entry:
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%call = tail call double @callee(double %a) #2
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store double %call, double* %res, align 8
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ret double %call
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}
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; Callee should not be tail called since it is not at a tail call position.
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; FIXME: A speculatable callee can be tail called if it is moved into a valid tail call position.
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define dso_local double @speculatable_callee_intermediate_instructions (double* nocapture %res, double %a) #0 {
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; CHECK-LABEL: speculatable_callee_intermediate_instructions:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: mflr r0
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; CHECK-NEXT: std r30, -16(r1) # 8-byte Folded Spill
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; CHECK-NEXT: std r0, 16(r1)
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; CHECK-NEXT: stdu r1, -48(r1)
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; CHECK-NEXT: mr r30, r3
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; CHECK-NEXT: bl callee
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; CHECK-NEXT: lis r3, 4101
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; CHECK-NEXT: ori r3, r3, 13107
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; CHECK-NEXT: rldic r3, r3, 34, 1
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; CHECK-NEXT: oris r3, r3, 52428
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; CHECK-NEXT: ori r3, r3, 52429
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; CHECK-NEXT: std r3, 0(r30)
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; CHECK-NEXT: addi r1, r1, 48
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; CHECK-NEXT: ld r0, 16(r1)
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; CHECK-NEXT: ld r30, -16(r1) # 8-byte Folded Reload
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; CHECK-NEXT: mtlr r0
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; CHECK-NEXT: blr
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entry:
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%call = tail call double @callee(double %a) #2
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store double 5.2, double* %res, align 8
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ret double %call
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}
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define dso_local double @callee(double) #1 {
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ret double 4.5
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}
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attributes #0 = { nounwind }
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attributes #1 = { readnone speculatable }
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attributes #2 = { nounwind noinline }
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