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1acdc5b15e
This in turn would sometimes introduce new cleanupblocks that didn't previously exist. The uses were being introduced by SSA value demotion. We actually want to *promote* uses of EH pointers and selectors, so I added some spcecial casing to avoid demoting such instructions. This is getting overly complicated, but hopefully we'll come along and delete it in the new representation. llvm-svn: 241950
92 lines
3.2 KiB
LLVM
92 lines
3.2 KiB
LLVM
; RUN: opt -winehprepare -S < %s | FileCheck %s
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; WinEHPrepare was crashing during phi demotion.
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target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc18.0.0"
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declare i32 @__C_specific_handler(...)
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@str = linkonce_odr unnamed_addr constant [16 x i8] c"caught it! %lx\0A\00", align 1
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declare void @maycrash()
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declare void @finally(i1 %abnormal)
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declare i32 @printf(i8* nocapture readonly, ...)
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declare i32 @llvm.eh.typeid.for(i8*)
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; Function Attrs: nounwind uwtable
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define void @doit() personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*) {
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entry:
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invoke void @maycrash()
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to label %invoke.cont unwind label %lpad.1
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invoke.cont: ; preds = %entry
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invoke void @maycrash()
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to label %__try.cont unwind label %lpad
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lpad: ; preds = %entry
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%lp0 = landingpad { i8*, i32 }
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cleanup
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catch i8* bitcast (i32 (i8*, i8*)* @"\01?filt$0@0@doit@@" to i8*)
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%ehptr.0 = extractvalue { i8*, i32 } %lp0, 0
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%ehsel.0 = extractvalue { i8*, i32 } %lp0, 1
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call void @finally(i1 true)
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br label %ehdispatch
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lpad.1: ; preds = %invoke.cont, %lpad
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%lp1 = landingpad { i8*, i32 }
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catch i8* bitcast (i32 (i8*, i8*)* @"\01?filt$0@0@doit@@" to i8*)
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%ehptr.1 = extractvalue { i8*, i32 } %lp1, 0
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%ehsel.1 = extractvalue { i8*, i32 } %lp1, 1
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br label %ehdispatch
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ehdispatch:
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%ehptr.2 = phi i8* [ %ehptr.0, %lpad ], [ %ehptr.1, %lpad.1 ]
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%ehsel.2 = phi i32 [ %ehsel.0, %lpad ], [ %ehsel.1, %lpad.1 ]
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%mysel = call i32 @llvm.eh.typeid.for(i8* bitcast (i32 (i8*, i8*)* @"\01?filt$0@0@doit@@" to i8*))
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%matches = icmp eq i32 %ehsel.2, %mysel
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br i1 %matches, label %__except, label %eh.resume
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__except: ; preds = %lpad, %lpad.1
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%t4 = ptrtoint i8* %ehptr.2 to i64
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%t5 = trunc i64 %t4 to i32
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%call = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @str, i64 0, i64 0), i32 %t5)
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br label %__try.cont
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__try.cont: ; preds = %invoke.cont, %__except
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call void @finally(i1 false)
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ret void
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eh.resume:
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%ehvals0 = insertvalue { i8*, i32 } undef, i8* %ehptr.2, 0
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%ehvals = insertvalue { i8*, i32 } %ehvals0, i32 %ehsel.2, 1
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resume { i8*, i32 } %ehvals
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}
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define internal i32 @"\01?filt$0@0@doit@@"(i8* %exception_pointers, i8* %frame_pointer) #1 {
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entry:
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%0 = bitcast i8* %exception_pointers to { i32*, i8* }*
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%1 = getelementptr inbounds { i32*, i8* }, { i32*, i8* }* %0, i32 0, i32 0
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%2 = load i32*, i32** %1
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%3 = load i32, i32* %2
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%cmp = icmp eq i32 %3, -1073741819
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%4 = zext i1 %cmp to i32
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ret i32 %4
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}
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; CHECK-LABEL: define void @doit()
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; CHECK: %lp0 = landingpad { i8*, i32 }
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; CHECK-NEXT: cleanup
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; CHECK-NEXT: catch i8*
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; CHECK-NEXT: call i8* (...) @llvm.eh.actions({{.*}})
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; CHECK-NEXT: indirectbr i8* %{{[^,]*}}, [label %__except]
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;
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; CHECK: %lp1 = landingpad { i8*, i32 }
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; CHECK-NEXT: catch i8*
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; CHECK-NEXT: call i8* (...) @llvm.eh.actions({{.*}})
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; CHECK-NEXT: indirectbr i8* %{{[^,]*}}, [label %__except]
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;
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; CHECK: __except:
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; CHECK: call i32 @llvm.eh.exceptioncode()
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; CHECK: call i32 (i8*, ...) @printf
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