a8e1135baa
This replaces the existing `-wasm-enable-exnref` with `-wasm-use-legacy-eh` option, in an effort to make the new standardized exnref proposal the 'default' state and the legacy proposal needs to be separately enabled an option. But given that most users haven't switched to the new proposal and major web browsers haven't turned it on by default, this `-wasm-use-legacy-eh` is turned on by default, so nothing will change for now for the functionality perspective. This also removes the restriction that `-wasm-enable-exnref` be only used with `-wasm-enable-eh` because this option is enabled by default. This option does not have any effect when `-wasm-enable-eh` is not used.
113 lines
3.1 KiB
YAML
113 lines
3.1 KiB
YAML
# RUN: llc -mtriple=wasm32-unknown-unknown -wasm-use-legacy-eh -exception-model=wasm -mattr=+exception-handling -run-pass wasm-late-eh-prepare -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 @eh_label_test() personality ptr @__gxx_wasm_personality_v0 {
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ret void
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}
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define void @unreachable_ehpad_test() personality ptr @__gxx_wasm_personality_v0 {
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ret void
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}
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define void @empty_cleanuppad_test() personality ptr @__gxx_wasm_personality_v0 {
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ret void
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}
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...
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---
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# This tests 'try' and 'catch' instructions are correctly placed with respect to
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# EH_LABEL instructions.
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# CHECK-LABEL: name: eh_label_test
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name: eh_label_test
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liveins:
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- { reg: '$arguments' }
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frameInfo:
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hasCalls: true
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body: |
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bb.0:
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; TRY should be before EH_LABEL wrappers of throwing calls
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; CHECK: bb.0
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; CHECK: TRY
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; CHECK-NEXT: EH_LABEL
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; CHECK-NEXT: CALL @foo
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; CHECK-NEXT: EH_LABEL
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successors: %bb.1, %bb.2
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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.2, implicit-def dead $arguments
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bb.1 (landing-pad):
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; predecessors: %bb.0
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successors: %bb.2
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; CATCH_ALL_LEGACY should be after EH_LABELs in the beginning of an EH pad.
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; (Sometimes there are multiple EH_LABELs in an EH pad. This test tests
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; that.) GLOBAL_SET should follow right after that.
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; CHECK: bb.1
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; CHECK: EH_LABEL
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; CHECK: EH_LABEL
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; CHECK-NEXT: CATCH_ALL_LEGACY
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; CHECK-NEXT: GLOBAL_SET_I32
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EH_LABEL <mcsymbol .Ltmp2>
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EH_LABEL <mcsymbol .Ltmp2>
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CATCHRET %bb.2, %bb.1, implicit-def dead $arguments
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bb.2:
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; predecessors: %bb.0, %bb.1
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RETURN implicit-def dead $arguments
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...
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---
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# Unreachable EH pads should be removed by LateEHPrepare.
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# CHECK-LABEL: name: unreachable_ehpad_test
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name: unreachable_ehpad_test
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liveins:
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- { reg: '$arguments' }
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body: |
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; CHECK: bb.0
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bb.0:
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successors: %bb.2
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BR %bb.2, implicit-def dead $arguments
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; This EH pad is unreachable, so it should be removed by LateEHPrepare
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; CHECK-NOT: bb.1 (landing-pad)
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bb.1 (landing-pad):
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successors: %bb.2
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EH_LABEL <mcsymbol .Ltmp2>
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CATCHRET %bb.2, %bb.1, implicit-def dead $arguments
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; CHECK: bb.2
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bb.2:
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; predecessors: %bb.0, %bb.1
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RETURN implicit-def dead $arguments
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...
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---
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# Regression test for a bug that LateEHPrepare::addCatchAll didn't handle empty
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# cleanup pads. (It tried to get debug info from end() iterator.)
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name: empty_cleanuppad_test
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liveins:
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- { reg: '$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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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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;; Empty cleanuppad
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bb.1 (landing-pad):
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successors: %bb.2
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EH_LABEL <mcsymbol .Ltmp2>
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bb.2:
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successors: %bb.3
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CLEANUPRET %bb.1, implicit-def dead $arguments
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bb.3:
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RETURN implicit-def dead $arguments
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...
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