https://llvm.org/bugs/show_bug.cgi?id=26147
Bug ID: 26147
Summary: Verify error: Unwind edges out of a funclet pad must
have the same unwind dest
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: a...@crichton.co
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
When running the IR below through `opt -inline` it will generate the error
Unwind edges out of a funclet pad must have the same unwind dest
%pad2.i = cleanuppad within none []
cleanupret from %pad2.i unwind label %bad1.i
invoke void @external() [ "funclet"(token %pad2.i) ]
to label %.noexc unwind label %bad
LLVM ERROR: Broken function found, compilation aborted!
---
; ModuleID = 'foo.ll'
target triple = "x86_64-pc-windows-msvc"
declare i32 @__C_specific_handler(...)
declare void @external()
define void @foo(i8*) personality i32 (...)* @__C_specific_handler {
start:
invoke void @bar(i8* %0)
to label %good unwind label %bad
good: ; preds = %start
ret void
bad: ; preds = %start
%pad = cleanuppad within none []
cleanupret from %pad unwind to caller
}
define internal void @bar(i8*) personality i32 (...)* @__C_specific_handler {
start:
invoke void @external()
to label %ok1 unwind label %bad1
ok1: ; preds = %start
invoke void @external()
to label %ok2 unwind label %bad2
ok2: ; preds = %ok1
ret void
bad2: ; preds = %ok1
%pad2 = cleanuppad within none []
call void @external() [ "funclet"(token %pad2) ]
cleanupret from %pad2 unwind label %bad1
bad1: ; preds = %bad2, %start
%pad1 = cleanuppad within none []
cleanupret from %pad1 unwind to caller
}
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