mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-24 06:30:19 +00:00
bb804ee909
Currently, llvm always emits a DWARF CIE with a version of 1, even when emitting DWARF 3 or 4, which both support CIE version 3. This patch makes it emit the newer CIE version when we are emitting DWARF 3 or 4. This will not reduce compatibility, as we already emit other DWARF3/4 features, and is worth doing as the DWARF3 spec removed some ambiguities in the interpretation of call frame information. It also fixes a minor bug where the "return address" field of the CIE was encoded as a ULEB128, which is only valid when the CIE version is 3. There are no test changes for this, because (as far as I can tell) none of the platforms that we test have a return address register with a DWARF register number >127. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211272 91177308-0d34-0410-b5e6-96231b3b80d8
47 lines
1.7 KiB
LLVM
47 lines
1.7 KiB
LLVM
; RUN: llc -verify-machineinstrs -mtriple=aarch64-none-linux-gnu %s -filetype=obj -o %t
|
|
; RUN: llvm-objdump -s %t | FileCheck %s
|
|
|
|
declare i32 @__gxx_personality_v0(...)
|
|
|
|
declare void @bar()
|
|
|
|
define i64 @foo(i64 %lhs, i64 %rhs) {
|
|
invoke void @bar() to label %end unwind label %clean
|
|
end:
|
|
ret i64 0
|
|
|
|
clean:
|
|
%tst = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) cleanup
|
|
ret i64 42
|
|
}
|
|
|
|
; CHECK: Contents of section .eh_frame:
|
|
; CHECK: 0000 1c000000 00000000 037a504c 5200017c .........zPLR..|
|
|
; CHECK: 0010 1e0b0000 00000000 00000000 1b0c1f00 ................
|
|
|
|
; Don't really care about the rest:
|
|
|
|
; 0020 1c000000 24000000 00000000 24000000 ....$.......$...
|
|
; 0030 08000000 00000000 00440c1f 10449e02 .........D...D..
|
|
|
|
; The key test here is that the personality routine is sanely encoded (under the
|
|
; small memory model it must be an 8-byte value for full generality: code+data <
|
|
; 4GB, but you might need both +4GB and -4GB depending on where things end
|
|
; up. However, for completeness:
|
|
|
|
; First CIE:
|
|
; ----------
|
|
; 1c000000: Length = 0x1c
|
|
; 00000000: This is a CIE
|
|
; 03: Version 3
|
|
; 7a 50 4c 52 00: Augmentation string "zPLR" (personality routine, language-specific data, pointer format)
|
|
; 01: Code alignment factor 1
|
|
; 78: Data alignment factor: -8
|
|
; 1e: Return address in x30
|
|
; 07: Augmentation data 0xb bytes (this is key!)
|
|
; 00: Personality encoding is DW_EH_PE_absptr
|
|
; 00 00 00 00 00 00 00 00: First part of aug (personality routine). Relocated, obviously
|
|
; 00: Second part of aug (language-specific data): absolute pointer format used
|
|
; 1b: pointer format: pc-relative signed 4-byte. Just like GNU.
|
|
; 0c 1f 00: Initial instructions ("DW_CFA_def_cfa x31 ofs 0" in this case)
|