47 lines
1.2 KiB
LLVM
47 lines
1.2 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt -passes='function(dse),cgscc(inline),function(sroa,gvn,sccp)' -S %s | FileCheck %s
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declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture)
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declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture)
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declare void @llvm.assume(i1 noundef)
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declare i1 @cond() #0
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define internal i1 @check_cond(ptr %a) #0 {
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%l = load i32, ptr %a
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%c = icmp eq i32 %l, 1
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br i1 %c, label %then, label %else
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then:
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%res = call i1 @cond()
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ret i1 %res
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else:
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ret i1 0
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}
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define i32 @test() {
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; CHECK-LABEL: define i32 @test() {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[THEN_I:%.*]]
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; CHECK: then.i:
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; CHECK-NEXT: [[RES_I:%.*]] = call i1 @cond()
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; CHECK-NEXT: br label [[CHECK_COND_EXIT:%.*]]
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; CHECK: check_cond.exit:
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; CHECK-NEXT: call void @llvm.assume(i1 [[RES_I]])
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; CHECK-NEXT: ret i32 0
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;
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entry:
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%a = alloca i32, align 4
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call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %a)
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store i32 1, ptr %a, align 4
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%res = call i1 @check_cond(ptr %a)
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call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %a)
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call void @llvm.assume(i1 %res)
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ret i32 0
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}
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attributes #0 = { nounwind readonly willreturn }
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