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237a621fb9
Summary: The pass incorrectly assumed if there's a longjmp declaration in the module, there is also a setjmp function declaration. Fixed it, and now the pass only converts longjmp and does not do any other transformation when there's no setjmp declaration in the module. Fixes PR39562. Reviewers: jgravelle-google, sbc100 Subscribers: dschuff, sunfish, llvm-commits Differential Revision: https://reviews.llvm.org/D54273 llvm-svn: 346445
25 lines
815 B
LLVM
25 lines
815 B
LLVM
; RUN: opt < %s -wasm-lower-em-ehsjlj -S | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown"
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%struct.__jmp_buf_tag = type { [6 x i32], i32, %struct.__sigset_t }
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%struct.__sigset_t = type { [32 x i32] }
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@buffer = global [1 x %struct.__jmp_buf_tag] zeroinitializer, align 16
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; Tests if program does not crash when there's no setjmp function calls in the
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; module.
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; CHECK: call void @emscripten_longjmp_jmpbuf
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define void @longjmp_only() {
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entry:
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call void @longjmp(%struct.__jmp_buf_tag* getelementptr inbounds ([1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* @buffer, i32 0, i32 0), i32 1) #1
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unreachable
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}
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; Function Attrs: noreturn nounwind
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declare void @longjmp(%struct.__jmp_buf_tag*, i32) #1
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attributes #1 = { noreturn nounwind }
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