mirror of
https://github.com/c64scene-ar/llvm-6502.git
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6c0b3ac8ea
candidate set for subsequent inlining, try to simplify the arguments to the inner call site now that inlining has been performed. The goal here is to propagate and fold constants through deeply nested call chains. Without doing this, we loose the inliner bonus that should be applied because the arguments don't match the exact pattern the cost estimator uses. Reviewed on IRC by Benjamin Kramer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152556 91177308-0d34-0410-b5e6-96231b3b80d8
90 lines
2.0 KiB
LLVM
90 lines
2.0 KiB
LLVM
; RUN: opt < %s -inline -S | FileCheck %s
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define internal i32 @callee1(i32 %A, i32 %B) {
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%C = sdiv i32 %A, %B
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ret i32 %C
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}
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define i32 @caller1() {
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; CHECK: define i32 @caller1
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; CHECK-NEXT: ret i32 3
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%X = call i32 @callee1( i32 10, i32 3 )
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ret i32 %X
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}
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define i32 @caller2() {
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; CHECK: @caller2
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; CHECK-NOT: call void @callee2
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; CHECK: ret
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; We contrive to make this hard for *just* the inline pass to do in order to
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; simulate what can actually happen with large, complex functions getting
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; inlined.
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%a = add i32 42, 0
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%b = add i32 48, 0
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%x = call i32 @callee21(i32 %a, i32 %b)
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ret i32 %x
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}
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define i32 @callee21(i32 %x, i32 %y) {
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%sub = sub i32 %y, %x
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%result = call i32 @callee22(i32 %sub)
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ret i32 %result
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}
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declare i8* @getptr()
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define i32 @callee22(i32 %x) {
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%icmp = icmp ugt i32 %x, 42
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br i1 %icmp, label %bb.true, label %bb.false
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bb.true:
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; This block musn't be counted in the inline cost.
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%ptr = call i8* @getptr()
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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load volatile i8* %ptr
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ret i32 %x
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bb.false:
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ret i32 %x
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}
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