aecbc92410
This renames MIR instruction `CATCH` and `CATCH_ALL` to `CATCH_LEGACY` and `CATCH_ALL_LEGACY` respectively. Follow-up PRs for the new EH (exnref) implementation will use `CATCH`, `CATCH_REF`, `CATCH_ALL`, and `CATCH_ALL_REF` as pseudo-instructions that return extracted values or `exnref` or both, because we don't currently support block return values in LLVM. So to give the old (real) `CATCH`es and the new (pseudo) `CATCH`es different names, this attaches `_LEGACY` prefix to the old names. This also rearranges `WebAssemblyInstrControl.td` so that the old legacy instructions are listed all together at the end.
117 lines
3.4 KiB
YAML
117 lines
3.4 KiB
YAML
# RUN: llc -mtriple=wasm32-unknown-unknown -exception-model=wasm -mattr=+exception-handling -run-pass wasm-cfg-stackify %s -o - | FileCheck %s
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--- |
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target triple = "wasm32-unknown-unknown"
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declare i32 @__gxx_wasm_personality_v0(...)
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declare void @foo()
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define void @rethrow_arg_test() personality ptr @__gxx_wasm_personality_v0 {
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ret void
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}
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define i32 @fix_end_function_test() personality ptr @__gxx_wasm_personality_v0 {
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ret i32 0
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}
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...
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---
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# CHECK-LABEL: name: rethrow_arg_test
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name: rethrow_arg_test
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liveins:
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- { reg: '$arguments' }
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body: |
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bb.0:
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successors: %bb.1, %bb.3
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; CHECK: bb.0:
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; CHECK: TRY
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EH_LABEL <mcsymbol .Ltmp0>
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CALL @foo, implicit-def dead $arguments, implicit $sp32, implicit $sp64
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EH_LABEL <mcsymbol .Ltmp1>
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BR %bb.3, implicit-def dead $arguments
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bb.1 (landing-pad):
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successors: %bb.2
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; CHECK: bb.1 (landing-pad):
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; CHECK: CATCH_LEGACY
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; CHECK: TRY
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; This RETHROW rethrows the exception caught by this BB's CATCH_LEGACY, but
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; after CFGStackify a TRY is placed between the CATCH_LEGACY and this
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; RETHROW, so after CFGStackify its immediate argument should become not 0,
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; but 1.
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; CHECK: RETHROW 1
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EH_LABEL <mcsymbol .Ltmp2>
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%0:i32 = CATCH_LEGACY &__cpp_exception, implicit-def dead $arguments
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RETHROW 0, implicit-def dead $arguments
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bb.2 (landing-pad):
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; CHECK: bb.2 (landing-pad):
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; CHECK: CATCH_LEGACY
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; CHECK: RETHROW 0
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EH_LABEL <mcsymbol .Ltmp3>
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%1:i32 = CATCH_LEGACY &__cpp_exception, implicit-def dead $arguments
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RETHROW 0, implicit-def dead $arguments
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bb.3:
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; CHECK: bb.3:
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; CHECK: END_TRY
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; CHECK: END_TRY
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RETURN implicit-def dead $arguments
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...
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---
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# This function has i32 return type and the end of the function is unreachable,
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# so CFGStackify's fixEndsAtEndOfFunction() propagates the return type while
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# they encounter 'end' or 'delegate'. This is a regression test for a bug that
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# we only handled 'end' but not 'delegate'.
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# CHECK-LABEL: name: fix_end_function_test
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name: fix_end_function_test
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liveins:
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- { reg: '$arguments' }
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machineFunctionInfo:
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params: [ ]
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results: [ i32 ]
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wasmEHFuncInfo:
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3: 4
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body: |
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; CHECK: TRY 127
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; CHECK: TRY 127
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; CHECK: CALL @foo
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; CHECK: TRY 64
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; CHECK: CALL @foo
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; CHECK: DELEGATE
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; CHECK: RETURN
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; CHECK: CATCH_LEGACY
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;; This TRY should have the return type i32 (127)
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; CHECK: TRY 127
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; CHECK: RETHROW
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; CHECK: DELEGATE
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; CHECK: END_TRY
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; CHECK: CATCH_LEGACY
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; CHECK: RETHROW
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; CHECK: END_TRY
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bb.0:
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successors: %bb.1, %bb.3
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EH_LABEL <mcsymbol .Ltmp0>
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CALL @foo, implicit-def dead $arguments, implicit $sp32, implicit $sp64
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EH_LABEL <mcsymbol .Ltmp1>
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bb.1:
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successors: %bb.2, %bb.4
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EH_LABEL <mcsymbol .Ltmp2>
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CALL @foo, implicit-def dead $arguments, implicit $sp32, implicit $sp64
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EH_LABEL <mcsymbol .Ltmp3>
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bb.2:
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%0:i32 = CONST_I32 3, implicit-def dead $arguments
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RETURN %0:i32, implicit-def dead $arguments
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bb.3 (landing-pad):
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EH_LABEL <mcsymbol .Ltmp4>
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%0:i32 = CATCH_LEGACY &__cpp_exception, implicit-def dead $arguments
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RETHROW 0, implicit-def dead $arguments
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bb.4 (landing-pad):
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EH_LABEL <mcsymbol .Ltmp5>
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%1:i32 = CATCH_LEGACY &__cpp_exception, implicit-def dead $arguments
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RETHROW 0, implicit-def dead $arguments
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...
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