472c79ca52
Verify that the arguments of a naked function are not used. They can only be referenced via registers/stack in inline asm, not as IR values. Doing so will result in assertion failures in the backend. There's probably more that we should verify, though I'm not completely sure what the constraints are (would it be correct to require that naked functions are exactly an inline asm call + unreachable, or is more allowed?) Fixes https://github.com/llvm/llvm-project/issues/104718.
87 lines
2.5 KiB
LLVM
87 lines
2.5 KiB
LLVM
; RUN: opt < %s -S -passes=partial-inliner -skip-partial-inlining-cost-analysis=true | FileCheck %s
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define i32 @callee_most(i32 %v) unnamed_addr #0 #1 {
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entry:
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%cmp = icmp sgt i32 %v, 2000
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br i1 %cmp, label %if.then, label %if.end
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if.then:
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br label %if.then2
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if.then2:
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%sub = sub i32 %v, 10
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br label %if.end
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if.end:
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%v2 = phi i32 [ %v, %entry ], [ %sub, %if.then2 ]
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%add = add nsw i32 %v2, 200
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ret i32 %add
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}
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define i32 @callee_noinline(i32 %v) optnone noinline {
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entry:
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%cmp = icmp sgt i32 %v, 2000
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br i1 %cmp, label %if.then, label %if.end
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if.then:
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br label %if.then2
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if.then2:
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%sub = sub i32 %v, 10
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br label %if.end
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if.end:
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%v2 = phi i32 [ %v, %entry ], [ %sub, %if.then2 ]
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%add = add nsw i32 %v2, 200
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ret i32 %add
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}
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define i32 @callee_writeonly(i32 %v) writeonly ssp {
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entry:
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%cmp = icmp sgt i32 %v, 2000
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br i1 %cmp, label %if.then, label %if.end
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if.then:
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br label %if.then2
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if.then2:
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%sub = sub i32 %v, 10
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br label %if.end
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if.end:
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%v2 = phi i32 [ %v, %entry ], [ %sub, %if.then2 ]
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%add = add nsw i32 %v2, 200
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ret i32 %add
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}
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; CHECK-LABEL: @caller
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; CHECK: call void @callee_most.2.if.then(i32 %v
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; CHECK: call i32 @callee_noinline(i32 %v)
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; CHECK: call void @callee_writeonly.1.if.then(i32 %v
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define i32 @caller(i32 %v) ssp {
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entry:
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%c1 = call i32 @callee_most(i32 %v)
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%c2 = call i32 @callee_noinline(i32 %v)
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%c3 = call i32 @callee_writeonly(i32 %v)
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ret i32 %c3
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}
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; CHECK: define internal void @callee_writeonly.1.if.then(i32 %v, ptr %sub.out) [[FN_ATTRS0:#[0-9]+]]
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; CHECK: define internal void @callee_most.2.if.then(i32 %v, ptr %sub.out) [[FN_ATTRS:#[0-9]+]]
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; attributes to preserve
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attributes #0 = {
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inlinehint minsize noduplicate noimplicitfloat norecurse noredzone nounwind
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nonlazybind optsize safestack sanitize_address sanitize_hwaddress sanitize_memory
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sanitize_thread ssp sspreq sspstrong uwtable "foo"="bar"
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"patchable-function"="prologue-short-redirect" "probe-stack"="_foo_guard" "stack-probe-size"="4096" }
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; CHECK: attributes [[FN_ATTRS0]] = { ssp
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; CHECK: attributes [[FN_ATTRS]] = { inlinehint minsize noduplicate noimplicitfloat norecurse noredzone nounwind nonlazybind optsize safestack sanitize_address sanitize_hwaddress sanitize_memory sanitize_thread ssp sspreq sspstrong uwtable "foo"="bar" "patchable-function"="prologue-short-redirect" "probe-stack"="_foo_guard" "stack-probe-size"="4096" }
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; attributes to drop
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attributes #1 = {
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alignstack=16 convergent inaccessiblememonly inaccessiblemem_or_argmemonly
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noreturn readonly argmemonly returns_twice speculatable "thunk"
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}
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