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20fef8ad53
Cleanuppads may be merged together if one is the only predecessor of the other in which case a simple transform can be performed: replace the a cleanupret with a branch and remove an unnecessary cleanuppad. Differential Revision: http://reviews.llvm.org/D17459 llvm-svn: 261390
40 lines
1.8 KiB
LLVM
40 lines
1.8 KiB
LLVM
; RUN: opt -S -simplifycfg < %s | FileCheck %s
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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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; Function Attrs: uwtable
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define void @test1() #0 personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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invoke void @may_throw(i32 3)
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to label %invoke.cont unwind label %ehcleanup
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invoke.cont: ; preds = %entry
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tail call void @may_throw(i32 2) #2
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tail call void @may_throw(i32 1) #2
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ret void
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ehcleanup: ; preds = %entry
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%cp = cleanuppad within none []
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tail call void @may_throw(i32 2) #2 [ "funclet"(token %cp) ]
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cleanupret from %cp unwind label %ehcleanup2
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ehcleanup2:
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%cp2 = cleanuppad within none []
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tail call void @may_throw(i32 1) #2 [ "funclet"(token %cp2) ]
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cleanupret from %cp2 unwind to caller
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}
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; CHECK-LABEL: define void @test1(
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; CHECK: %[[cp:.*]] = cleanuppad within none []
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; CHECK: tail call void @may_throw(i32 2) #2 [ "funclet"(token %[[cp]]) ]
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; CHECK: tail call void @may_throw(i32 1) #2 [ "funclet"(token %[[cp]]) ]
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; CHECK: cleanupret from %[[cp]] unwind to caller
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declare void @may_throw(i32) #1
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declare i32 @__CxxFrameHandler3(...)
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attributes #0 = { uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #2 = { nounwind }
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