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b545ac7cd4
We were overly cautious in our analysis of loops which have invokes which unwind to EH pads. The loop unroll transform is safe because it only clones blocks in the loop body, it does not try to split critical edges involving EH pads. Instead, move the necessary safety check to LoopUnswitch. N.B. The safety check for loop unswitch is covered by an existing test which fails without it. llvm-svn: 268357
41 lines
1.1 KiB
LLVM
41 lines
1.1 KiB
LLVM
; RUN: opt -S -loop-unroll %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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define void @test1() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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br label %for.body
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for.body: ; preds = %entry, %for.inc
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%phi = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
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invoke void @callee(i32 %phi)
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to label %for.inc unwind label %ehcleanup
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for.inc: ; preds = %for.body
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%inc = add nuw nsw i32 %phi, 1
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%cmp = icmp slt i32 %inc, 3
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.inc
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call void @dtor()
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ret void
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ehcleanup: ; preds = %for.body
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%cp = cleanuppad within none []
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call void @dtor() [ "funclet"(token %cp) ]
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cleanupret from %cp unwind to caller
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}
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; CHECK-LABEL: define void @test1(
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; CHECK: invoke void @callee(i32 0
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; CHECK: invoke void @callee(i32 1
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; CHECK: invoke void @callee(i32 2
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declare void @callee(i32)
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declare i32 @__CxxFrameHandler3(...)
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declare void @dtor()
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