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33 lines
720 B
LLVM
33 lines
720 B
LLVM
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; RUN: opt -S -Oz %s | FileCheck %s
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@a = global i32 4
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define i1 @inner() {
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%a1 = load volatile i32* @a
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%x1 = add i32 %a1, %a1
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%c = icmp eq i32 %x1, 0
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; Here are enough instructions to prevent inlining, but because they are used
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; only by the @llvm.assume intrinsic, they're free (and, thus, inlining will
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; still happen).
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%a2 = mul i32 %a1, %a1
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%a3 = sub i32 %a1, 5
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%a4 = udiv i32 %a3, -13
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%a5 = mul i32 %a4, %a4
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%a6 = add i32 %a5, %x1
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%ca = icmp sgt i32 %a6, -7
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tail call void @llvm.assume(i1 %ca)
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ret i1 %c
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}
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; @inner() should be inlined for -Oz.
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; CHECK-NOT: call i1 @inner
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define i1 @outer() optsize {
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%r = call i1 @inner()
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ret i1 %r
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}
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declare void @llvm.assume(i1) nounwind
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