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701073e58e
attribute and function argument attribute synthesizing and propagating. As with the other uses of this attribute, the goal remains a best-effort (no guarantees) attempt to not optimize the function or assume things about the function when optimizing. This is particularly useful for compiler testing, bisecting miscompiles, triaging things, etc. I was hitting specific issues using optnone to isolate test code from a test driver for my fuzz testing, and this is one step of fixing that. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215538 91177308-0d34-0410-b5e6-96231b3b80d8
25 lines
498 B
LLVM
25 lines
498 B
LLVM
; RUN: opt < %s -functionattrs -S | FileCheck %s
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@x = global i32 0
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define void @test_opt(i8* %p) {
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; CHECK-LABEL: @test_opt
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; CHECK: (i8* nocapture readnone %p) #0 {
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ret void
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}
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define void @test_optnone(i8* %p) noinline optnone {
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; CHECK-LABEL: @test_optnone
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; CHECK: (i8* %p) #1 {
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ret void
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}
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declare i8 @strlen(i8*) noinline optnone
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; CHECK-LABEL: @strlen
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; CHECK: (i8*) #1
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; CHECK-LABEL: attributes #0
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; CHECK: = { readnone }
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; CHECK-LABEL: attributes #1
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; CHECK: = { noinline optnone }
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