43 lines
1.3 KiB
LLVM
43 lines
1.3 KiB
LLVM
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; RUN: opt -passes='loop(loop-instsimplify,loop-simplifycfg,unswitch),verify<loops>' -S < %s | FileCheck %s
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; RUN: opt -verify-memoryssa -passes='loop-mssa(loop-instsimplify,loop-simplifycfg,unswitch),verify<loops>' -S < %s | FileCheck %s
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declare void @some_func() noreturn
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define i32 @test1(i32* %var, i1 %cond1, i1 %cond2) {
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; CHECK-LABEL: @test1(
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entry:
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br label %loop_begin
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 %{{.*}}, label %entry.split, label %loop_exit.split
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;
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; CHECK: entry.split:
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; CHECK-NEXT: br i1 %{{.*}}, label %entry.split.split, label %loop_exit
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;
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; CHECK: entry.split.split:
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; CHECK-NEXT: br label %loop_begin
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loop_begin:
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br i1 %cond1, label %continue, label %loop_exit ; first trivial condition
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continue:
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%var_val = load i32, i32* %var
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%var_cond = trunc i32 %var_val to i1
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%maybe_cond = select i1 %cond1, i1 %cond2, i1 %var_cond
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br i1 %maybe_cond, label %do_something, label %loop_exit ; second trivial condition
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do_something:
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call void @some_func() noreturn nounwind
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br label %loop_begin
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; CHECK: loop_begin:
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; CHECK-NEXT: call
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; CHECK-NEXT: br label %loop_begin
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loop_exit:
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ret i32 0
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; CHECK: loop_exit:
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; CHECK-NEXT: br label %loop_exit.split
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;
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; CHECK: loop_exit.split:
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; CHECK-NEXT: ret
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}
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