diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp --- a/llvm/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp +++ b/llvm/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp @@ -848,7 +848,7 @@ SmallVector EHPadStack; // Range of intructions to be wrapped in a new nested try/catch using TryRange = std::pair; - // In original CFG, + // In original CFG, DenseMap> UnwindDestToTryRanges; // In new CFG, DenseMap> BrDestToTryRanges; @@ -985,7 +985,7 @@ // ... // cont: for (auto &P : UnwindDestToTryRanges) { - NumUnwindMismatches++; + NumUnwindMismatches += P.second.size(); // This means the destination is the appendix BB, which was separately // handled above. @@ -1300,7 +1300,9 @@ } } // Fix mismatches in unwind destinations induced by linearizing the code. - fixUnwindMismatches(MF); + if (MCAI->getExceptionHandlingType() == ExceptionHandling::Wasm && + MF.getFunction().hasPersonalityFn()) + fixUnwindMismatches(MF); } void WebAssemblyCFGStackify::rewriteDepthImmediates(MachineFunction &MF) { diff --git a/llvm/test/CodeGen/WebAssembly/cfg-stackify-eh.ll b/llvm/test/CodeGen/WebAssembly/cfg-stackify-eh.ll --- a/llvm/test/CodeGen/WebAssembly/cfg-stackify-eh.ll +++ b/llvm/test/CodeGen/WebAssembly/cfg-stackify-eh.ll @@ -1,6 +1,7 @@ ; RUN: llc < %s -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -disable-block-placement -verify-machineinstrs -fast-isel=false -machine-sink-split-probability-threshold=0 -cgp-freq-ratio-to-skip-merge=1000 -exception-model=wasm -mattr=+exception-handling | FileCheck %s ; RUN: llc < %s -O0 -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -verify-machineinstrs -exception-model=wasm -mattr=+exception-handling | FileCheck %s --check-prefix=NOOPT ; RUN: llc < %s -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -disable-block-placement -verify-machineinstrs -fast-isel=false -machine-sink-split-probability-threshold=0 -cgp-freq-ratio-to-skip-merge=1000 -exception-model=wasm -mattr=+exception-handling -wasm-disable-ehpad-sort | FileCheck %s --check-prefix=NOSORT +; RUN: llc < %s -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -disable-block-placement -verify-machineinstrs -fast-isel=false -machine-sink-split-probability-threshold=0 -cgp-freq-ratio-to-skip-merge=1000 -exception-model=wasm -mattr=+exception-handling -wasm-disable-ehpad-sort -stats 2>&1 | FileCheck %s --check-prefix=NOSORT-STAT target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128" target triple = "wasm32-unknown-unknown" @@ -664,6 +665,9 @@ ret void } +; Check if the unwind destination mismatch stats are correct +; NOSORT-STAT: 11 wasm-cfg-stackify - Number of EH pad unwind mismatches found + declare void @foo() declare void @bar() declare i32 @baz()