| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu \ |
| ; RUN: -ppc-asm-full-reg-names -ppc-vsr-nums-as-vr < %s | FileCheck %s |
| |
| ; The tests check the behavior of the tail call decision when the callee is speculatable. |
| |
| ; Callee should be tail called in this function since it is at a tail call position. |
| define dso_local double @speculatable_callee_return_use_only (ptr nocapture %res, double %a) #0 { |
| ; CHECK-LABEL: speculatable_callee_return_use_only: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: b callee |
| ; CHECK-NEXT: #TC_RETURNd8 callee 0 |
| entry: |
| %value = tail call double @callee(double %a) #2 |
| ret double %value |
| } |
| |
| ; Callee should not be tail called since it is not at a tail call position. |
| define dso_local void @speculatable_callee_non_return_use_only (ptr nocapture %res, double %a) #0 { |
| ; CHECK-LABEL: speculatable_callee_non_return_use_only: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: mflr r0 |
| ; CHECK-NEXT: std r30, -16(r1) # 8-byte Folded Spill |
| ; CHECK-NEXT: stdu r1, -48(r1) |
| ; CHECK-NEXT: std r0, 64(r1) |
| ; CHECK-NEXT: mr r30, r3 |
| ; CHECK-NEXT: bl callee |
| ; CHECK-NEXT: stfd f1, 0(r30) |
| ; CHECK-NEXT: addi r1, r1, 48 |
| ; CHECK-NEXT: ld r0, 16(r1) |
| ; CHECK-NEXT: ld r30, -16(r1) # 8-byte Folded Reload |
| ; CHECK-NEXT: mtlr r0 |
| ; CHECK-NEXT: blr |
| entry: |
| %call = tail call double @callee(double %a) #2 |
| store double %call, ptr %res, align 8 |
| ret void |
| } |
| |
| ; Callee should not be tail called since it is not at a tail call position. |
| define dso_local double @speculatable_callee_multi_use (ptr nocapture %res, double %a) #0 { |
| ; CHECK-LABEL: speculatable_callee_multi_use: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: mflr r0 |
| ; CHECK-NEXT: std r30, -16(r1) # 8-byte Folded Spill |
| ; CHECK-NEXT: stdu r1, -48(r1) |
| ; CHECK-NEXT: std r0, 64(r1) |
| ; CHECK-NEXT: mr r30, r3 |
| ; CHECK-NEXT: bl callee |
| ; CHECK-NEXT: stfd f1, 0(r30) |
| ; CHECK-NEXT: addi r1, r1, 48 |
| ; CHECK-NEXT: ld r0, 16(r1) |
| ; CHECK-NEXT: ld r30, -16(r1) # 8-byte Folded Reload |
| ; CHECK-NEXT: mtlr r0 |
| ; CHECK-NEXT: blr |
| entry: |
| %call = tail call double @callee(double %a) #2 |
| store double %call, ptr %res, align 8 |
| ret double %call |
| } |
| |
| ; Callee should not be tail called since it is not at a tail call position. |
| ; FIXME: A speculatable callee can be tail called if it is moved into a valid tail call position. |
| define dso_local double @speculatable_callee_intermediate_instructions (ptr nocapture %res, double %a) #0 { |
| ; CHECK-LABEL: speculatable_callee_intermediate_instructions: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: mflr r0 |
| ; CHECK-NEXT: std r30, -16(r1) # 8-byte Folded Spill |
| ; CHECK-NEXT: stdu r1, -48(r1) |
| ; CHECK-NEXT: std r0, 64(r1) |
| ; CHECK-NEXT: mr r30, r3 |
| ; CHECK-NEXT: bl callee |
| ; CHECK-NEXT: lis r3, 4101 |
| ; CHECK-NEXT: ori r3, r3, 13107 |
| ; CHECK-NEXT: rldic r3, r3, 34, 1 |
| ; CHECK-NEXT: oris r3, r3, 52428 |
| ; CHECK-NEXT: ori r3, r3, 52429 |
| ; CHECK-NEXT: std r3, 0(r30) |
| ; CHECK-NEXT: addi r1, r1, 48 |
| ; CHECK-NEXT: ld r0, 16(r1) |
| ; CHECK-NEXT: ld r30, -16(r1) # 8-byte Folded Reload |
| ; CHECK-NEXT: mtlr r0 |
| ; CHECK-NEXT: blr |
| |
| entry: |
| %call = tail call double @callee(double %a) #2 |
| store double 5.2, ptr %res, align 8 |
| ret double %call |
| } |
| |
| |
| define dso_local double @callee(double) #1 { |
| ; CHECK-LABEL: callee: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: addis r3, r2, .LCPI4_0@toc@ha |
| ; CHECK-NEXT: lfs f1, .LCPI4_0@toc@l(r3) |
| ; CHECK-NEXT: blr |
| ret double 4.5 |
| } |
| |
| attributes #0 = { nounwind } |
| attributes #1 = { readnone speculatable } |
| attributes #2 = { nounwind noinline } |