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[Reduce] Argument reduction: do deal with function declarations We can happily turn function definitions into declarations, thus obscuring their argument from being elided by this pass. I don't believe there is a good reason to just ignore declarations. likely even proper llvm intrinsics ones, at worst the input becomes uninteresting. The other question here is that all these transforms are all-or-nothing. In some cases, should we be treating each use separately? The main blocker here seemed to be that llvm::CloneFunctionInto() does `&OldFunc->front()`, which inserts a nullptr into a densemap, which is not happy about it and asserts.
2020-07-26 05:56:36 +08:00
; RUN: llvm-reduce --test FileCheck --test-arg --check-prefixes=CHECK-ALL,CHECK-INTERESTINGNESS --test-arg %s --test-arg --input-file %s -o %t
; RUN: cat %t | FileCheck --check-prefixes=CHECK-ALL,CHECK-FINAL %s
; CHECK-INTERESTINGNESS-LABEL: @interesting(
; CHECK-INTERESTINGNESS-SAME: i32
; CHECK-FINAL: declare void @interesting(i32)
declare void @interesting(i32 %uninteresting1, i32 %interesting, i32 %uninteresting2)
; CHECK-INTERESTINGNESS-LABEL: @interesting2(
; CHECK-INTERESTINGNESS-SAME: i32
; CHECK-FINAL: declare void @interesting2(i32)
declare void @interesting2(i32 %uninteresting1, i32 %interesting, i32 %uninteresting2)
; CHECK-INTERESTINGNESS-LABEL: @callee(
; CHECK-INTERESTINGNESS-SAME: i32 %interesting
; CHECK-FINAL: define void @callee(i32 %interesting) {
define void @callee(i32 %uninteresting1, i32 %interesting, i32 %uninteresting2) {
; CHECK-INTERESTINGNESS: call void @interesting2(
; CHECK-INTERESTINGNESS-SAME: i32 %interesting
; CHECK-FINAL: call void @interesting2(i32 %interesting)
call void @interesting2(i32 %uninteresting1, i32 %interesting, i32 %uninteresting2)
; CHECK-ALL: ret void
ret void
}