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https://github.com/RPCS3/llvm-mirror.git
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3a1d9fe91a
most of the inliner test cases. The inliner involves a bunch of interesting code and tends to be where most of the issues I've seen experimenting with the new PM lie. All of these test cases pass, but I'd like to keep some more thorough coverage here so doing a fairly blanket enabling. There are a handful of interesting tests I've not enabled yet because they're focused on the always inliner, or on functionality that doesn't (yet) exist in the inliner. llvm-svn: 290592
348 lines
7.9 KiB
LLVM
348 lines
7.9 KiB
LLVM
; RUN: opt < %s -inline -inline-threshold=20 -S | FileCheck %s
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; RUN: opt < %s -passes='cgscc(inline)' -inline-threshold=20 -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-LABEL: 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 that we can constant-prop through instructions after inlining callee21
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; to get constants in the inlined callsite to callee22.
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; FIXME: Currently, the threshold is fixed at 20 because we don't perform
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; *recursive* cost analysis to realize that the nested call site will definitely
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; inline and be cheap. We should eventually do that and lower the threshold here
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; to 1.
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;
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; CHECK-LABEL: @caller2(
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; CHECK-NOT: call void @callee2
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; CHECK: ret
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%x = call i32 @callee21(i32 42, i32 48)
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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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%x1 = add i32 %x, 1
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%x2 = add i32 %x1, 1
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%x3 = add i32 %x2, 1
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%x4 = add i32 %x3, 1
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%x5 = add i32 %x4, 1
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%x6 = add i32 %x5, 1
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%x7 = add i32 %x6, 1
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%x8 = add i32 %x7, 1
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ret i32 %x8
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bb.false:
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ret i32 %x
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}
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define i32 @caller3() {
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; Check that even if the expensive path is hidden behind several basic blocks,
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; it doesn't count toward the inline cost when constant-prop proves those paths
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; dead.
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;
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; CHECK-LABEL: @caller3(
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; CHECK-NOT: call
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; CHECK: ret i32 6
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entry:
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%x = call i32 @callee3(i32 42, i32 48)
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ret i32 %x
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}
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define i32 @callee3(i32 %x, i32 %y) {
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%sub = sub i32 %y, %x
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%icmp = icmp ugt i32 %sub, 42
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br i1 %icmp, label %bb.true, label %bb.false
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bb.true:
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%icmp2 = icmp ult i32 %sub, 64
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br i1 %icmp2, label %bb.true.true, label %bb.true.false
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bb.true.true:
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; This block musn't be counted in the inline cost.
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%x1 = add i32 %x, 1
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%x2 = add i32 %x1, 1
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%x3 = add i32 %x2, 1
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%x4 = add i32 %x3, 1
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%x5 = add i32 %x4, 1
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%x6 = add i32 %x5, 1
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%x7 = add i32 %x6, 1
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%x8 = add i32 %x7, 1
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br label %bb.merge
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bb.true.false:
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; This block musn't be counted in the inline cost.
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%y1 = add i32 %y, 1
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%y2 = add i32 %y1, 1
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%y3 = add i32 %y2, 1
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%y4 = add i32 %y3, 1
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%y5 = add i32 %y4, 1
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%y6 = add i32 %y5, 1
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%y7 = add i32 %y6, 1
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%y8 = add i32 %y7, 1
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br label %bb.merge
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bb.merge:
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%result = phi i32 [ %x8, %bb.true.true ], [ %y8, %bb.true.false ]
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ret i32 %result
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bb.false:
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ret i32 %sub
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}
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declare {i8, i1} @llvm.uadd.with.overflow.i8(i8 %a, i8 %b)
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define i8 @caller4(i8 %z) {
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; Check that we can constant fold through intrinsics such as the
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; overflow-detecting arithmetic instrinsics. These are particularly important
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; as they are used heavily in standard library code and generic C++ code where
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; the arguments are oftent constant but complete generality is required.
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;
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; CHECK-LABEL: @caller4(
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; CHECK-NOT: call
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; CHECK: ret i8 -1
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entry:
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%x = call i8 @callee4(i8 254, i8 14, i8 %z)
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ret i8 %x
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}
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define i8 @callee4(i8 %x, i8 %y, i8 %z) {
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%uadd = call {i8, i1} @llvm.uadd.with.overflow.i8(i8 %x, i8 %y)
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%o = extractvalue {i8, i1} %uadd, 1
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br i1 %o, label %bb.true, label %bb.false
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bb.true:
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ret i8 -1
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bb.false:
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; This block musn't be counted in the inline cost.
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%z1 = add i8 %z, 1
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%z2 = add i8 %z1, 1
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%z3 = add i8 %z2, 1
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%z4 = add i8 %z3, 1
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%z5 = add i8 %z4, 1
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%z6 = add i8 %z5, 1
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%z7 = add i8 %z6, 1
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%z8 = add i8 %z7, 1
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ret i8 %z8
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}
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define i64 @caller5(i64 %y) {
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; Check that we can round trip constants through various kinds of casts etc w/o
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; losing track of the constant prop in the inline cost analysis.
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;
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; CHECK-LABEL: @caller5(
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; CHECK-NOT: call
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; CHECK: ret i64 -1
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entry:
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%x = call i64 @callee5(i64 42, i64 %y)
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ret i64 %x
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}
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define i64 @callee5(i64 %x, i64 %y) {
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%inttoptr = inttoptr i64 %x to i8*
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%bitcast = bitcast i8* %inttoptr to i32*
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%ptrtoint = ptrtoint i32* %bitcast to i64
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%trunc = trunc i64 %ptrtoint to i32
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%zext = zext i32 %trunc to i64
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%cmp = icmp eq i64 %zext, 42
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br i1 %cmp, label %bb.true, label %bb.false
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bb.true:
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ret i64 -1
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bb.false:
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; This block musn't be counted in the inline cost.
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%y1 = add i64 %y, 1
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%y2 = add i64 %y1, 1
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%y3 = add i64 %y2, 1
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%y4 = add i64 %y3, 1
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%y5 = add i64 %y4, 1
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%y6 = add i64 %y5, 1
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%y7 = add i64 %y6, 1
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%y8 = add i64 %y7, 1
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ret i64 %y8
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}
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define float @caller6() {
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; Check that we can constant-prop through fcmp instructions
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;
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; CHECK-LABEL: @caller6(
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; CHECK-NOT: call
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; CHECK: ret
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%x = call float @callee6(float 42.0)
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ret float %x
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}
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define float @callee6(float %x) {
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%icmp = fcmp ugt float %x, 42.0
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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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%x1 = fadd float %x, 1.0
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%x2 = fadd float %x1, 1.0
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%x3 = fadd float %x2, 1.0
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%x4 = fadd float %x3, 1.0
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%x5 = fadd float %x4, 1.0
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%x6 = fadd float %x5, 1.0
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%x7 = fadd float %x6, 1.0
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%x8 = fadd float %x7, 1.0
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ret float %x8
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bb.false:
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ret float %x
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}
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define i32 @PR13412.main() {
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; This is a somewhat complicated three layer subprogram that was reported to
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; compute the wrong value for a branch due to assuming that an argument
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; mid-inline couldn't be equal to another pointer.
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;
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; After inlining, the branch should point directly to the exit block, not to
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; the intermediate block.
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; CHECK: @PR13412.main
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; CHECK: br i1 true, label %[[TRUE_DEST:.*]], label %[[FALSE_DEST:.*]]
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; CHECK: [[FALSE_DEST]]:
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; CHECK-NEXT: call void @PR13412.fail()
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; CHECK: [[TRUE_DEST]]:
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; CHECK-NEXT: ret i32 0
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entry:
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%i1 = alloca i64
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store i64 0, i64* %i1
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%arraydecay = bitcast i64* %i1 to i32*
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%call = call i1 @PR13412.first(i32* %arraydecay, i32* %arraydecay)
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br i1 %call, label %cond.end, label %cond.false
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cond.false:
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call void @PR13412.fail()
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br label %cond.end
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cond.end:
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ret i32 0
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}
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define internal i1 @PR13412.first(i32* %a, i32* %b) {
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entry:
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%call = call i32* @PR13412.second(i32* %a, i32* %b)
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%cmp = icmp eq i32* %call, %b
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ret i1 %cmp
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}
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declare void @PR13412.fail()
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define internal i32* @PR13412.second(i32* %a, i32* %b) {
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entry:
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%sub.ptr.lhs.cast = ptrtoint i32* %b to i64
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%sub.ptr.rhs.cast = ptrtoint i32* %a to i64
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%sub.ptr.sub = sub i64 %sub.ptr.lhs.cast, %sub.ptr.rhs.cast
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%sub.ptr.div = ashr exact i64 %sub.ptr.sub, 2
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%cmp = icmp ugt i64 %sub.ptr.div, 1
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br i1 %cmp, label %if.then, label %if.end3
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if.then:
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%0 = load i32, i32* %a
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%1 = load i32, i32* %b
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%cmp1 = icmp eq i32 %0, %1
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br i1 %cmp1, label %return, label %if.end3
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if.end3:
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br label %return
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return:
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%retval.0 = phi i32* [ %b, %if.end3 ], [ %a, %if.then ]
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ret i32* %retval.0
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}
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declare i32 @PR28802.external(i32 returned %p1)
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define internal i32 @PR28802.callee() {
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entry:
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br label %cont
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cont:
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%0 = phi i32 [ 0, %entry ]
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%call = call i32 @PR28802.external(i32 %0)
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ret i32 %call
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}
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define i32 @PR28802() {
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entry:
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%call = call i32 @PR28802.callee()
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ret i32 %call
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}
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; CHECK-LABEL: define i32 @PR28802(
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; CHECK: %[[call:.*]] = call i32 @PR28802.external(i32 0)
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; CHECK: ret i32 %[[call]]
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define internal i32 @PR28848.callee(i32 %p2, i1 %c) {
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entry:
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br i1 %c, label %cond.end, label %cond.true
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cond.true:
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br label %cond.end
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cond.end:
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%cond = phi i32 [ 0, %cond.true ], [ %p2, %entry ]
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%or = or i32 %cond, %p2
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ret i32 %or
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}
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define i32 @PR28848() {
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entry:
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%call = call i32 @PR28848.callee(i32 0, i1 false)
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ret i32 %call
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}
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; CHECK-LABEL: define i32 @PR28848(
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; CHECK: ret i32 0
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define internal void @callee7(i16 %param1, i16 %param2) {
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entry:
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br label %bb
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bb:
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%phi = phi i16 [ %param2, %entry ]
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%add = add i16 %phi, %param1
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ret void
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}
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declare i16 @caller7.external(i16 returned)
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define void @caller7() {
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bb1:
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%call = call i16 @caller7.external(i16 1)
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call void @callee7(i16 0, i16 %call)
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ret void
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}
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; CHECK-LABEL: define void @caller7(
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; CHECK: %call = call i16 @caller7.external(i16 1)
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; CHECK-NEXT: ret void
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