55ac745828
This ensures that frame-based unwinding will continue to work when calling a noreturn function; there is not much use having the caller's frame pointer saved if you don't also have the caller's program counter. Patch by James Clarke. Differential Revision: https://reviews.llvm.org/D68542 llvm-svn: 373907
38 lines
1.3 KiB
LLVM
38 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -march=mips64 -relocation-model=static < %s \
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; RUN: | FileCheck %s --check-prefix STATIC
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; RUN: llc -march=mips64 -relocation-model=pic < %s \
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; RUN: | FileCheck %s --check-prefix PIC
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declare dso_local void @callee() noreturn nounwind
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define dso_local void @caller() nounwind "no-frame-pointer-elim-non-leaf" {
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; STATIC-LABEL: caller:
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; STATIC: # %bb.0: # %entry
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; STATIC-NEXT: daddiu $sp, $sp, -16
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; STATIC-NEXT: sd $ra, 8($sp) # 8-byte Folded Spill
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; STATIC-NEXT: sd $fp, 0($sp) # 8-byte Folded Spill
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; STATIC-NEXT: move $fp, $sp
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; STATIC-NEXT: jal callee
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; STATIC-NEXT: nop
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;
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; PIC-LABEL: caller:
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; PIC: # %bb.0: # %entry
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; PIC-NEXT: daddiu $sp, $sp, -32
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; PIC-NEXT: sd $ra, 24($sp) # 8-byte Folded Spill
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; PIC-NEXT: sd $fp, 16($sp) # 8-byte Folded Spill
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; PIC-NEXT: sd $gp, 8($sp) # 8-byte Folded Spill
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; PIC-NEXT: move $fp, $sp
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; PIC-NEXT: lui $1, %hi(%neg(%gp_rel(caller)))
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; PIC-NEXT: daddu $1, $1, $25
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; PIC-NEXT: daddiu $gp, $1, %lo(%neg(%gp_rel(caller)))
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; PIC-NEXT: ld $25, %call16(callee)($gp)
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; PIC-NEXT: .reloc .Ltmp0, R_MIPS_JALR, callee
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; PIC-NEXT: .Ltmp0:
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; PIC-NEXT: jalr $25
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; PIC-NEXT: nop
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entry:
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tail call void @callee()
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unreachable
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}
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