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57ed5ffc76
emitDebugLocValue() into DwarfExpression. Ought to be NFC, but it actually uncovered a bug in the debug-loc-asan.ll testcase. The testcase checks that the address of variable "y" is stored at [RSP+16], which also lines up with the comment. It also check(ed) that the *value* of "y" is stored in RDI before that, but that is actually incorrect, since RDI is the very value that is stored in [RSP+16]. Here's the assembler output: movb 2147450880(%rcx), %r8b #DEBUG_VALUE: bar:y <- RDI cmpb $0, %r8b movq %rax, 32(%rsp) # 8-byte Spill movq %rsi, 24(%rsp) # 8-byte Spill movq %rdi, 16(%rsp) # 8-byte Spill .Ltmp3: #DEBUG_VALUE: bar:y <- [RSP+16] Fixed the comment to spell out the correct register and the check to expect an address rather than a value. Note that the range that is emitted for the RDI location was and is still wrong, it claims to begin at the function prologue, but really it should start where RDI is first assigned. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225851 91177308-0d34-0410-b5e6-96231b3b80d8 |
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| Analysis | ||
| Assembler | ||
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| TestRunner.sh | ||