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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu \
; RUN: -mcpu=pwr10 -ppc-asm-full-reg-names -ppc-vsr-nums-as-vr < %s | \
; RUN: FileCheck %s
; RUN: llc -verify-machineinstrs -target-abi=elfv2 -mtriple=powerpc64-- \
; RUN: -mcpu=pwr10 -ppc-asm-full-reg-names -ppc-vsr-nums-as-vr < %s | \
; RUN: FileCheck %s
; The tests check the behaviour of PC Relative tail calls. When using
; PC Relative we are able to do more tail calling than we have done in
; the past as we no longer need to restore the TOC pointer into R2 after
; most calls.
@Func = external local_unnamed_addr global i32 (...)*, align 8
@FuncLocal = common dso_local local_unnamed_addr global i32 (...)* null, align 8
; No calls in this function but we assign the function pointers.
define dso_local void @AssignFuncPtr() local_unnamed_addr {
; CHECK-LABEL: AssignFuncPtr:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: pld r3, Func@got@pcrel(0), 1
; CHECK-NEXT: pld r4, Function@got@pcrel(0), 1
; CHECK-NEXT: std r4, 0(r3)
; CHECK-NEXT: pstd r4, FuncLocal@PCREL(0), 1
; CHECK-NEXT: blr
entry:
store i32 (...)* @Function, i32 (...)** @Func, align 8
store i32 (...)* @Function, i32 (...)** @FuncLocal, align 8
ret void
}
declare signext i32 @Function(...)
define dso_local void @TailCallLocalFuncPtr() local_unnamed_addr {
; CHECK-LABEL: TailCallLocalFuncPtr:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: pld r12, FuncLocal@PCREL(0), 1
; CHECK-NEXT: mtctr r12
; CHECK-NEXT: bctr
; CHECK-NEXT: #TC_RETURNr8 ctr 0
entry:
%0 = load i32 ()*, i32 ()** bitcast (i32 (...)** @FuncLocal to i32 ()**), align 8
%call = tail call signext i32 %0()
ret void
}
define dso_local void @TailCallExtrnFuncPtr() local_unnamed_addr {
; CHECK-LABEL: TailCallExtrnFuncPtr:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: pld r3, Func@got@pcrel(0), 1
; CHECK-NEXT: .Lpcrel0:
; CHECK-NEXT: .reloc .Lpcrel0-8,R_PPC64_PCREL_OPT,.-(.Lpcrel0-8)
; CHECK-NEXT: ld r12, 0(r3)
; CHECK-NEXT: mtctr r12
; CHECK-NEXT: bctr
; CHECK-NEXT: #TC_RETURNr8 ctr 0
entry:
%0 = load i32 ()*, i32 ()** bitcast (i32 (...)** @Func to i32 ()**), align 8
%call = tail call signext i32 %0()
ret void
}
define dso_local signext i32 @TailCallParamFuncPtr(i32 (...)* nocapture %passedfunc) local_unnamed_addr {
; CHECK-LABEL: TailCallParamFuncPtr:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: mtctr r3
; CHECK-NEXT: mr r12, r3
; CHECK-NEXT: bctr
; CHECK-NEXT: #TC_RETURNr8 ctr 0
entry:
%callee.knr.cast = bitcast i32 (...)* %passedfunc to i32 ()*
%call = tail call signext i32 %callee.knr.cast()
ret i32 %call
}
define dso_local signext i32 @NoTailIndirectCall(i32 (...)* nocapture %passedfunc, i32 signext %a) local_unnamed_addr {
; CHECK-LABEL: NoTailIndirectCall:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: mflr r0
; CHECK-NEXT: .cfi_def_cfa_offset 48
; CHECK-NEXT: .cfi_offset lr, 16
; CHECK-NEXT: .cfi_offset r30, -16
; CHECK-NEXT: std r30, -16(r1) # 8-byte Folded Spill
; CHECK-NEXT: std r0, 16(r1)
; CHECK-NEXT: stdu r1, -48(r1)
; CHECK-NEXT: mr r12, r3
; CHECK-NEXT: mtctr r3
; CHECK-NEXT: mr r30, r4
; CHECK-NEXT: bctrl
; CHECK-NEXT: add r3, r3, r30
; CHECK-NEXT: extsw r3, r3
; 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:
%callee.knr.cast = bitcast i32 (...)* %passedfunc to i32 ()*
%call = tail call signext i32 %callee.knr.cast()
%add = add nsw i32 %call, %a
ret i32 %add
}
define dso_local signext i32 @TailCallDirect() local_unnamed_addr {
; CHECK-LABEL: TailCallDirect:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: b Function@notoc
; CHECK-NEXT: #TC_RETURNd8 Function@notoc 0
entry:
%call = tail call signext i32 bitcast (i32 (...)* @Function to i32 ()*)()
ret i32 %call
}
define dso_local signext i32 @NoTailCallDirect(i32 signext %a) local_unnamed_addr {
; CHECK-LABEL: NoTailCallDirect:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: mflr r0
; CHECK-NEXT: .cfi_def_cfa_offset 48
; CHECK-NEXT: .cfi_offset lr, 16
; CHECK-NEXT: .cfi_offset r30, -16
; CHECK-NEXT: std r30, -16(r1) # 8-byte Folded Spill
; CHECK-NEXT: std r0, 16(r1)
; CHECK-NEXT: stdu r1, -48(r1)
; CHECK-NEXT: mr r30, r3
; CHECK-NEXT: bl Function@notoc
; CHECK-NEXT: add r3, r3, r30
; CHECK-NEXT: extsw r3, r3
; 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 signext i32 bitcast (i32 (...)* @Function to i32 ()*)()
%add = add nsw i32 %call, %a
ret i32 %add
}
define dso_local signext i32 @TailCallDirectLocal() local_unnamed_addr {
; CHECK-LABEL: TailCallDirectLocal:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: b LocalFunction@notoc
; CHECK-NEXT: #TC_RETURNd8 LocalFunction@notoc 0
entry:
%call = tail call fastcc signext i32 @LocalFunction()
ret i32 %call
}
define dso_local signext i32 @NoTailCallDirectLocal(i32 signext %a) local_unnamed_addr {
; CHECK-LABEL: NoTailCallDirectLocal:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: mflr r0
; CHECK-NEXT: .cfi_def_cfa_offset 48
; CHECK-NEXT: .cfi_offset lr, 16
; CHECK-NEXT: .cfi_offset r30, -16
; CHECK-NEXT: std r30, -16(r1) # 8-byte Folded Spill
; CHECK-NEXT: std r0, 16(r1)
; CHECK-NEXT: stdu r1, -48(r1)
; CHECK-NEXT: mr r30, r3
; CHECK-NEXT: bl LocalFunction@notoc
; CHECK-NEXT: add r3, r3, r30
; CHECK-NEXT: extsw r3, r3
; 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 fastcc signext i32 @LocalFunction()
%add = add nsw i32 %call, %a
ret i32 %add
}
define dso_local signext i32 @TailCallAbs() local_unnamed_addr {
; CHECK-LABEL: TailCallAbs:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: li r3, 400
; CHECK-NEXT: li r12, 400
; CHECK-NEXT: mtctr r3
; CHECK-NEXT: bctr
; CHECK-NEXT: #TC_RETURNr8 ctr 0
entry:
%call = tail call signext i32 inttoptr (i64 400 to i32 ()*)()
ret i32 %call
}
define dso_local signext i32 @NoTailCallAbs(i32 signext %a) local_unnamed_addr {
; CHECK-LABEL: NoTailCallAbs:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: mflr r0
; CHECK-NEXT: .cfi_def_cfa_offset 48
; CHECK-NEXT: .cfi_offset lr, 16
; CHECK-NEXT: .cfi_offset r30, -16
; CHECK-NEXT: std r30, -16(r1) # 8-byte Folded Spill
; CHECK-NEXT: std r0, 16(r1)
; CHECK-NEXT: stdu r1, -48(r1)
; CHECK-NEXT: mr r30, r3
; CHECK-NEXT: li r3, 400
; CHECK-NEXT: li r12, 400
; CHECK-NEXT: mtctr r3
; CHECK-NEXT: bctrl
; CHECK-NEXT: add r3, r3, r30
; CHECK-NEXT: extsw r3, r3
; 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 signext i32 inttoptr (i64 400 to i32 ()*)()
%add = add nsw i32 %call, %a
ret i32 %add
}
; Function Attrs: noinline
; This function should be tail called and not inlined.
define internal fastcc signext i32 @LocalFunction() unnamed_addr #0 {
; CHECK-LABEL: LocalFunction:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: #APP
; CHECK-NEXT: li r3, 42
; CHECK-NEXT: #NO_APP
; CHECK-NEXT: extsw r3, r3
; CHECK-NEXT: blr
entry:
%0 = tail call i32 asm "li $0, 42", "=&r"()
ret i32 %0
}
attributes #0 = { noinline }
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