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58a27d4683
Summary: DW_CFA_restore can only encode register numbers up to 64 (6 bits unsigned int). For regsiter numbers > 64 we have to use DW_CFA_restore_extended instead which uses a ULEB128 value. I discovered this problem in the out-of-tree CHERI target since we use DWARF register number 89 for our return capability register. Reviewers: probinson, dblaikie, aprantl, espindola Reviewed By: dblaikie Subscribers: JohnReagan, emaste, JDevlieghere, llvm-commits Differential Revision: https://reviews.llvm.org/D54420 llvm-svn: 346751
18 lines
470 B
ArmAsm
18 lines
470 B
ArmAsm
// RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o - | llvm-dwarfdump -debug-frame - | FileCheck %s
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// Check that register numbers greater than 63 can be used in .cfi_restore directives
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f:
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.cfi_startproc
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nop
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// CHECK: DW_CFA_advance_loc: 1
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.cfi_restore %rbp
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// CHECK-NEXT: DW_CFA_restore: reg6
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nop
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// CHECK-NEXT: DW_CFA_advance_loc: 1
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.cfi_restore 89
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// CHECK-NEXT: DW_CFA_restore_extended: reg89
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// CHECK-NEXT: DW_CFA_nop:
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nop
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.cfi_endproc
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