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c846f55ed0
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
27 lines
887 B
LLVM
27 lines
887 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -march=mipsel < %s | FileCheck %s
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declare i8* @llvm.frameaddress(i32) nounwind readnone
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define i8* @f() nounwind uwtable {
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; CHECK-LABEL: f:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: addiu $sp, $sp, -8
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: sw $ra, 4($sp) # 4-byte Folded Spill
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; CHECK-NEXT: sw $fp, 0($sp) # 4-byte Folded Spill
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; CHECK-NEXT: .cfi_offset 31, -4
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; CHECK-NEXT: .cfi_offset 30, -8
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; CHECK-NEXT: move $fp, $sp
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; CHECK-NEXT: .cfi_def_cfa_register 30
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; CHECK-NEXT: move $2, $fp
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; CHECK-NEXT: move $sp, $fp
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; CHECK-NEXT: lw $fp, 0($sp) # 4-byte Folded Reload
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; CHECK-NEXT: lw $ra, 4($sp) # 4-byte Folded Reload
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; CHECK-NEXT: jr $ra
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; CHECK-NEXT: addiu $sp, $sp, 8
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entry:
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%0 = call i8* @llvm.frameaddress(i32 0)
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ret i8* %0
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}
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