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67ae135759
Similarly inlining of the function is inhibited, if that would duplicate the call (in particular inlining is still allowed when there is only one callsite and the function has internal linkage). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170704 91177308-0d34-0410-b5e6-96231b3b80d8
69 lines
1.9 KiB
LLVM
69 lines
1.9 KiB
LLVM
; RUN: opt < %s -loop-unswitch -verify-loop-info -S < %s 2>&1 | FileCheck %s
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define i32 @test(i32* %A, i1 %C) {
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entry:
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br label %no_exit
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no_exit: ; preds = %no_exit.backedge, %entry
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%i.0.0 = phi i32 [ 0, %entry ], [ %i.0.0.be, %no_exit.backedge ] ; <i32> [#uses=3]
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%gep.upgrd.1 = zext i32 %i.0.0 to i64 ; <i64> [#uses=1]
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%tmp.7 = getelementptr i32* %A, i64 %gep.upgrd.1 ; <i32*> [#uses=4]
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%tmp.13 = load i32* %tmp.7 ; <i32> [#uses=2]
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%tmp.14 = add i32 %tmp.13, 1 ; <i32> [#uses=1]
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store i32 %tmp.14, i32* %tmp.7
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br i1 %C, label %then, label %endif
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then: ; preds = %no_exit
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%tmp.29 = load i32* %tmp.7 ; <i32> [#uses=1]
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%tmp.30 = add i32 %tmp.29, 2 ; <i32> [#uses=1]
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store i32 %tmp.30, i32* %tmp.7
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%inc9 = add i32 %i.0.0, 1 ; <i32> [#uses=2]
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%tmp.112 = icmp ult i32 %inc9, 100000 ; <i1> [#uses=1]
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br i1 %tmp.112, label %no_exit.backedge, label %return
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no_exit.backedge: ; preds = %endif, %then
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%i.0.0.be = phi i32 [ %inc9, %then ], [ %inc, %endif ] ; <i32> [#uses=1]
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br label %no_exit
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endif: ; preds = %no_exit
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%inc = add i32 %i.0.0, 1 ; <i32> [#uses=2]
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%tmp.1 = icmp ult i32 %inc, 100000 ; <i1> [#uses=1]
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br i1 %tmp.1, label %no_exit.backedge, label %return
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return: ; preds = %endif, %then
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ret i32 %tmp.13
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}
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; This simple test would normally unswitch, but should be inhibited by the presence of
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; the noduplicate call.
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; CHECK: @test2
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define i32 @test2(i32* %var) {
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%mem = alloca i32
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store i32 2, i32* %mem
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%c = load i32* %mem
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br label %loop_begin
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loop_begin:
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%var_val = load i32* %var
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switch i32 %c, label %default [
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i32 1, label %inc
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i32 2, label %dec
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]
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inc:
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call void @incf() noreturn nounwind
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br label %loop_begin
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dec:
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; CHECK: call void @decf()
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; CHECK-NOT: call void @decf()
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call void @decf() noreturn nounwind noduplicate
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br label %loop_begin
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default:
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br label %loop_exit
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loop_exit:
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ret i32 0
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; CHECK: }
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}
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declare void @incf() noreturn
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declare void @decf() noreturn
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