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5388e6f9b3
This crash was pretty common while compiling Rust for iOS (armv7). Reason - SjLj preparation step was lowering aggregate arguments as ExtractValue + InsertValue. ExtractValue has assertion which checks that there is some data in value, which is not true in case of empty (no fields) structures. Rust uses them quite extensively so this patch uses a 'select true, %val, undef' instruction to lower the argument. Patch by Valerii Hiora. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212922 91177308-0d34-0410-b5e6-96231b3b80d8
32 lines
880 B
LLVM
32 lines
880 B
LLVM
; RUN: llc -mtriple=armv7-apple-ios -O0 < %s | FileCheck %s
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; RUN: llc -mtriple=armv7-apple-ios -O1 < %s | FileCheck %s
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; RUN: llc -mtriple=armv7-apple-ios -O2 < %s | FileCheck %s
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; RUN: llc -mtriple=armv7-apple-ios -O3 < %s | FileCheck %s
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; SjLjEHPrepare shouldn't crash when lowering empty structs.
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;
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; Checks that between in case of empty structs used as arguments
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; nothing happens, i.e. there are no instructions between
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; __Unwind_SjLj_Register and actual @bar invocation
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define i8* @foo({} %c) {
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entry:
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; CHECK: bl __Unwind_SjLj_Register
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; CHECK-NEXT: {{[A-Z][a-zA-Z0-9]*}}:
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; CHECK-NEXT: bl _bar
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invoke void @bar ()
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to label %unreachable unwind label %handler
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unreachable:
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unreachable
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handler:
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%tmp = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @baz to i8*)
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cleanup
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resume { i8*, i32 } undef
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}
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declare void @bar()
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declare i32 @baz(...)
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