a1e1dcabe4
SUMMARY: In order for the runtime on AIX to find the compact unwind section(EHInfo table), we would need to set the following on the traceback table: The 6th byte's longtbtable field to true to signal there is an Extended TB Table Flag. The Extended TB Table Flag to be 0x08 to signal there is an exception handling info presents. Emit the offset between ehinfo TC entry and TOC base after all other optional portions of traceback table. The patch is authored by Jason Liu. Reviewers: David Tenty, Digger Lin Differential Revision: https://reviews.llvm.org/D92766
178 lines
7.1 KiB
LLVM
178 lines
7.1 KiB
LLVM
; RUN: llc -verify-machineinstrs -mtriple powerpc-ibm-aix-xcoff -mcpu=pwr4 \
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; RUN: -mattr=-altivec < %s | \
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; RUN: FileCheck --check-prefixes=ASM,ASM32 %s
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; RUN: llc -verify-machineinstrs -mtriple powerpc64-ibm-aix-xcoff -mcpu=pwr4 \
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; RUN: -mattr=-altivec < %s | \
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; RUN: FileCheck --check-prefixes=ASM,ASM64 %s
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@_ZTIi = external constant i8*
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define void @_Z9throwFuncv() {
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entry:
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%exception = call i8* @__cxa_allocate_exception(i32 4) #2
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%0 = bitcast i8* %exception to i32*
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store i32 1, i32* %0, align 16
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call void @__cxa_throw(i8* %exception, i8* bitcast (i8** @_ZTIi to i8*), i8* null) #3
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unreachable
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}
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; ASM: ._Z9throwFuncv:
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; ASM: bl .__cxa_allocate_exception[PR]
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; ASM: nop
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; ASM32: lwz 4, L..C0(2)
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; ASM64: ld 4, L..C0(2)
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; ASM: bl .__cxa_throw[PR]
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; ASM: nop
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define i32 @_Z9catchFuncv() personality i8* bitcast (i32 (...)* @__xlcxx_personality_v1 to i8*) {
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entry:
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%retval = alloca i32, align 4
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%exn.slot = alloca i8*, align 4
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%ehselector.slot = alloca i32, align 4
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%0 = alloca i32, align 4
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invoke void @_Z9throwFuncv()
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to label %invoke.cont unwind label %lpad
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invoke.cont: ; preds = %entry
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br label %try.cont
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lpad: ; preds = %entry
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%1 = landingpad { i8*, i32 }
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catch i8* bitcast (i8** @_ZTIi to i8*)
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%2 = extractvalue { i8*, i32 } %1, 0
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store i8* %2, i8** %exn.slot, align 4
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%3 = extractvalue { i8*, i32 } %1, 1
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store i32 %3, i32* %ehselector.slot, align 4
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br label %catch.dispatch
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catch.dispatch: ; preds = %lpad
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%sel = load i32, i32* %ehselector.slot, align 4
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%4 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) #2
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%matches = icmp eq i32 %sel, %4
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br i1 %matches, label %catch, label %eh.resume
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catch: ; preds = %catch.dispatch
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%exn = load i8*, i8** %exn.slot, align 4
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%5 = call i8* @__cxa_begin_catch(i8* %exn) #2
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%6 = bitcast i8* %5 to i32*
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%7 = load i32, i32* %6, align 4
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store i32 %7, i32* %0, align 4
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store i32 2, i32* %retval, align 4
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call void @__cxa_end_catch() #2
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br label %return
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try.cont: ; preds = %invoke.cont
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store i32 1, i32* %retval, align 4
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br label %return
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return: ; preds = %try.cont, %catch
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%8 = load i32, i32* %retval, align 4
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ret i32 %8
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eh.resume: ; preds = %catch.dispatch
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%exn1 = load i8*, i8** %exn.slot, align 4
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%sel2 = load i32, i32* %ehselector.slot, align 4
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%lpad.val = insertvalue { i8*, i32 } undef, i8* %exn1, 0
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%lpad.val3 = insertvalue { i8*, i32 } %lpad.val, i32 %sel2, 1
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resume { i8*, i32 } %lpad.val3
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}
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; ASM: ._Z9catchFuncv:
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; ASM: L..func_begin0:
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; ASM: # %bb.0: # %entry
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; ASM: mflr 0
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; ASM: L..tmp0:
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; ASM: bl ._Z9throwFuncv
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; ASM: nop
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; ASM: L..tmp1:
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; ASM: # %bb.1: # %invoke.cont
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; ASM: li 3, 1
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; ASM: L..BB1_2: # %return
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; ASM: mtlr 0
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; ASM: blr
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; ASM: L..BB1_3: # %lpad
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; ASM: L..tmp2:
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; ASM: bl .__cxa_begin_catch[PR]
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; ASM: nop
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; ASM: bl .__cxa_end_catch[PR]
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; ASM: nop
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; ASM: b L..BB1_2
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; ASM: L.._Z9catchFuncv0:
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; ASM: .vbyte 4, 0x00000000 # Traceback table begin
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; ASM: .byte 0x00 # Version = 0
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; ASM: .byte 0x09 # Language = CPlusPlus
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; ASM: .byte 0x22 # -IsGlobaLinkage, -IsOutOfLineEpilogOrPrologue
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; ASM: # +HasTraceBackTableOffset, -IsInternalProcedure
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; ASM: # -HasControlledStorage, -IsTOCless
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; ASM: # +IsFloatingPointPresent
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; ASM: # -IsFloatingPointOperationLogOrAbortEnabled
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; ASM: .byte 0x41 # -IsInterruptHandler, +IsFunctionNamePresent, -IsAllocaUsed
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; ASM: # OnConditionDirective = 0, -IsCRSaved, +IsLRSaved
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; ASM: .byte 0x80 # +IsBackChainStored, -IsFixup, NumOfFPRsSaved = 0
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; ASM: .byte 0x40 # -HasVectorInfo, +HasExtensionTable, NumOfGPRsSaved = 0
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; ASM: .byte 0x00 # NumberOfFixedParms = 0
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; ASM: .byte 0x01 # NumberOfFPParms = 0, +HasParmsOnStack
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; ASM: .vbyte 4, L.._Z9catchFuncv0-._Z9catchFuncv # Function size
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; ASM: .vbyte 2, 0x000d # Function name len = 13
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; ASM: .byte '_,'Z,'9,'c,'a,'t,'c,'h,'F,'u,'n,'c,'v # Function Name
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; ASM: .byte 0x08 # ExtensionTableFlag = TB_EH_INFO
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; ASM: .align 2
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; ASM32: .vbyte 4, L..C1-TOC[TC0] # EHInfo Table
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; ASM64: .vbyte 8, L..C1-TOC[TC0] # EHInfo Table
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; ASM: L..func_end0:
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; ASM: .csect .gcc_except_table[RO],2
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; ASM: .align 2
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; ASM: GCC_except_table1:
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; ASM: L..exception0:
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; ASM: .byte 255 # @LPStart Encoding = omit
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; ASM32: .byte 187 # @TType Encoding = indirect datarel sdata4
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; ASM64: .byte 188 # @TType Encoding = indirect datarel sdata8
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; ASM32: .byte 37
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; ASM64: .byte 41
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; ASM: .byte 3 # Call site Encoding = udata4
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; ASM: .byte 26
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; ASM: .vbyte 4, L..tmp0-L..func_begin0 # >> Call Site 1 <<
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; ASM: .vbyte 4, L..tmp1-L..tmp0 # Call between L..tmp0 and L..tmp1
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; ASM: .vbyte 4, L..tmp2-L..func_begin0 # jumps to L..tmp2
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; ASM: .byte 1 # On action: 1
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; ASM: .vbyte 4, L..tmp1-L..func_begin0 # >> Call Site 2 <<
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; ASM: .vbyte 4, L..func_end0-L..tmp1 # Call between L..tmp1 and L..func_end0
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; ASM: .vbyte 4, 0 # has no landing pad
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; ASM: .byte 0 # On action: cleanup
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; ASM: L..cst_end0:
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; ASM: .byte 1 # >> Action Record 1 <<
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; ASM: # Catch TypeInfo 1
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; ASM: .byte 0 # No further actions
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; ASM: .align 2
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; ASM: # >> Catch TypeInfos <<
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; ASM32: .vbyte 4, L..C0-TOC[TC0] # TypeInfo 1
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; ASM64: .vbyte 8, L..C0-TOC[TC0] # TypeInfo 1
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; ASM: L..ttbase0:
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; ASM: .align 2
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; ASM: .csect .eh_info_table[RW],2
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; ASM: __ehinfo.1:
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; ASM: .vbyte 4, 0
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; ASM32: .align 2
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; ASM32: .vbyte 4, GCC_except_table1
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; ASM32: .vbyte 4, __xlcxx_personality_v1[DS]
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; ASM64: .align 3
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; ASM64: .vbyte 8, GCC_except_table1
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; ASM64: .vbyte 8, __xlcxx_personality_v1[DS]
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; ASM: .toc
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; ASM: L..C0:
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; ASM: .tc _ZTIi[TC],_ZTIi[UA]
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; ASM: L..C1:
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; ASM: .tc __ehinfo.1[TC],__ehinfo.1
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declare i8* @__cxa_allocate_exception(i32)
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declare void @__cxa_throw(i8*, i8*, i8*)
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declare i32 @__xlcxx_personality_v1(...)
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declare i32 @llvm.eh.typeid.for(i8*)
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declare i8* @__cxa_begin_catch(i8*)
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declare void @__cxa_end_catch()
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