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fd64c3a741
Similar to
commit bc044a88ee3c ("[Inline] prevent inlining on stack protector mismatch")
The noprofile function attribute is meant to prevent compiler
instrumentation from being inserted into a function. Inlining may defeat
the developer's intent. If the caller and callee don't either BOTH have
the attribute or BOTH lack the attribute, suppress inline substitution.
This matches behavior being proposed in GCC:
https://gcc.gnu.org/pipermail/gcc-patches/2021-June/573511.html
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80223
Add LangRef entry for noprofile fn attr, similar to text added in D93422
and D104944.
Reviewed By: MaskRay, melver, phosek
Differential Revision: https://reviews.llvm.org/D104810
45 lines
1.5 KiB
LLVM
45 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=inline %s -S -pass-remarks-missed=inline 2>&1 | FileCheck %s --check-prefixes=CHECK,CHECK-INLINE
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; RUN: opt -passes=always-inline %s -S | FileCheck %s
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; Test that we don't inline when caller and callee don't have matching
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; noprofile fn attrs.
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; CHECK-INLINE: profile not inlined into profile_caller because it should never be inlined (cost=never): conflicting attributes
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; CHECK-INLINE: noprofile not inlined into noprofile_caller because it should never be inlined (cost=never): conflicting attributes
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define i32 @profile() { ret i32 42 }
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define i32 @noprofile() noprofile { ret i32 43 }
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define i32 @profile_aa() alwaysinline { ret i32 44 }
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define i32 @noprofile_aa() noprofile alwaysinline { ret i32 45 }
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define i32 @profile_caller() noprofile {
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; CHECK-LABEL: @profile_caller(
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; CHECK-NEXT: [[TMP1:%.*]] = call i32 @profile()
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; CHECK-NEXT: ret i32 44
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;
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call i32 @profile()
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%2 = call i32 @profile_aa()
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ret i32 %2
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}
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define i32 @noprofile_caller() {
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; CHECK-LABEL: @noprofile_caller(
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; CHECK-NEXT: [[TMP1:%.*]] = call i32 @noprofile()
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; CHECK-NEXT: ret i32 45
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;
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call i32 @noprofile()
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%2 = call i32 @noprofile_aa()
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ret i32 %2
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}
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; Test that we do inline when caller and callee don't have matching
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; noprofile fn attrs, when CallInst is alwaysinline.
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define i32 @aa_callsite() {
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; CHECK-INLINE-LABEL: @aa_callsite(
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; CHECK-INLINE-NEXT: ret i32 43
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;
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%1 = call i32 @noprofile() alwaysinline
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ret i32 %1
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}
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