mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 11:42:57 +01:00
050789b0c9
If an analysis is actually invalidated, there's already a log statement for that: 'Invalidating analysis: FooAnalysis'. Otherwise the statement is not very useful. Reviewed By: asbirlea, ychen Differential Revision: https://reviews.llvm.org/D84981
202 lines
6.3 KiB
LLVM
202 lines
6.3 KiB
LLVM
; Test for a subtle bug when computing analyses during inlining and mutating
|
|
; the SCC structure. Without care, this can fail to invalidate analyses.
|
|
;
|
|
; RUN: opt < %s -passes='cgscc(inline,function(verify<domtree>))' -debug-pass-manager -S 2>&1 | FileCheck %s
|
|
|
|
; First we check that the passes run in the way we expect. Otherwise this test
|
|
; may stop testing anything.
|
|
;
|
|
; CHECK-LABEL: Starting llvm::Module pass manager run.
|
|
; CHECK: Running pass: InlinerPass on (test1_f, test1_g, test1_h)
|
|
; CHECK: Running analysis: DominatorTreeAnalysis on test1_f
|
|
; CHECK: Running analysis: DominatorTreeAnalysis on test1_g
|
|
; CHECK: Invalidating analysis: DominatorTreeAnalysis on test1_f
|
|
; CHECK: Invalidating analysis: LoopAnalysis on test1_f
|
|
; CHECK: Invalidating analysis: BranchProbabilityAnalysis on test1_f
|
|
; CHECK: Invalidating analysis: BlockFrequencyAnalysis on test1_f
|
|
; CHECK: Invalidating analysis: DominatorTreeAnalysis on test1_g
|
|
; CHECK: Invalidating analysis: LoopAnalysis on test1_g
|
|
; CHECK: Invalidating analysis: BranchProbabilityAnalysis on test1_g
|
|
; CHECK: Invalidating analysis: BlockFrequencyAnalysis on test1_g
|
|
; CHECK: Invalidating analysis: DominatorTreeAnalysis on test1_h
|
|
; CHECK: Invalidating analysis: LoopAnalysis on test1_h
|
|
; CHECK: Invalidating analysis: BranchProbabilityAnalysis on test1_h
|
|
; CHECK: Invalidating analysis: BlockFrequencyAnalysis on test1_h
|
|
; CHECK-NOT: Invalidating analysis:
|
|
; CHECK: Starting llvm::Function pass manager run.
|
|
; CHECK-NEXT: Running pass: DominatorTreeVerifierPass on test1_g
|
|
; CHECK-NEXT: Running analysis: DominatorTreeAnalysis on test1_g
|
|
; CHECK-NEXT: Finished llvm::Function pass manager run.
|
|
; CHECK-NOT: Invalidating analysis:
|
|
; CHECK: Starting llvm::Function pass manager run.
|
|
; CHECK-NEXT: Running pass: DominatorTreeVerifierPass on test1_h
|
|
; CHECK-NEXT: Running analysis: DominatorTreeAnalysis on test1_h
|
|
; CHECK-NEXT: Finished llvm::Function pass manager run.
|
|
; CHECK-NOT: Invalidating analysis:
|
|
; CHECK: Running pass: DominatorTreeVerifierPass on test1_f
|
|
; CHECK-NEXT: Running analysis: DominatorTreeAnalysis on test1_f
|
|
|
|
; An external function used to control branches.
|
|
declare i1 @flag()
|
|
; CHECK-LABEL: declare i1 @flag()
|
|
|
|
; The utility function with interesting control flow that gets inlined below to
|
|
; perturb the dominator tree.
|
|
define internal void @callee() {
|
|
entry:
|
|
%ptr = alloca i8
|
|
%flag = call i1 @flag()
|
|
br i1 %flag, label %then, label %else
|
|
|
|
then:
|
|
store volatile i8 42, i8* %ptr
|
|
br label %return
|
|
|
|
else:
|
|
store volatile i8 -42, i8* %ptr
|
|
br label %return
|
|
|
|
return:
|
|
ret void
|
|
}
|
|
|
|
; The 'test1_' prefixed functions work to carefully test that incrementally
|
|
; reducing an SCC in the inliner cannot accidentially leave stale function
|
|
; analysis results due to failing to invalidate them for all the functions.
|
|
|
|
; The inliner visits this last function. It can't actually break any cycles
|
|
; here, but because we visit this function we compute fresh analyses for it.
|
|
; These analyses are then invalidated when we inline callee disrupting the
|
|
; CFG, and it is important that they be freed.
|
|
define void @test1_h() {
|
|
; CHECK-LABEL: define void @test1_h()
|
|
entry:
|
|
call void @test1_g()
|
|
; CHECK: call void @test1_g()
|
|
|
|
; Pull interesting CFG into this function.
|
|
call void @callee()
|
|
; CHECK-NOT: call void @callee()
|
|
|
|
ret void
|
|
; CHECK: ret void
|
|
}
|
|
|
|
; We visit this function second and here we inline the edge to 'test1_f'
|
|
; separating it into its own SCC. The current SCC is now just 'test1_g' and
|
|
; 'test1_h'.
|
|
define void @test1_g() {
|
|
; CHECK-LABEL: define void @test1_g()
|
|
entry:
|
|
; This edge gets inlined away.
|
|
call void @test1_f()
|
|
; CHECK-NOT: call void @test1_f()
|
|
; CHECK: call void @test1_g()
|
|
|
|
; We force this edge to survive inlining.
|
|
call void @test1_h() noinline
|
|
; CHECK: call void @test1_h()
|
|
|
|
; Pull interesting CFG into this function.
|
|
call void @callee()
|
|
; CHECK-NOT: call void @callee()
|
|
|
|
ret void
|
|
; CHECK: ret void
|
|
}
|
|
|
|
; We visit this function first in the inliner, and while we inline callee
|
|
; perturbing the CFG, we don't inline anything else and the SCC structure
|
|
; remains in tact.
|
|
define void @test1_f() {
|
|
; CHECK-LABEL: define void @test1_f()
|
|
entry:
|
|
; We force this edge to survive inlining.
|
|
call void @test1_g() noinline
|
|
; CHECK: call void @test1_g()
|
|
|
|
; Pull interesting CFG into this function.
|
|
call void @callee()
|
|
; CHECK-NOT: call void @callee()
|
|
|
|
ret void
|
|
; CHECK: ret void
|
|
}
|
|
|
|
; The 'test2_' prefixed code works to carefully trigger forming an SCC with
|
|
; a dominator tree for one of the functions but not the other and without even
|
|
; a function analysis manager proxy for the SCC that things get merged into.
|
|
; Without proper handling when updating the call graph this will find a stale
|
|
; dominator tree.
|
|
|
|
@test2_global = external global i32, align 4
|
|
|
|
define void @test2_hoge(i1 (i32*)* %arg) {
|
|
; CHECK-LABEL: define void @test2_hoge(
|
|
bb:
|
|
%tmp2 = call zeroext i1 %arg(i32* @test2_global)
|
|
; CHECK: call zeroext i1 %arg(
|
|
br label %bb3
|
|
|
|
bb3:
|
|
%tmp5 = call zeroext i1 %arg(i32* @test2_global)
|
|
; CHECK: call zeroext i1 %arg(
|
|
br i1 %tmp5, label %bb3, label %bb6
|
|
|
|
bb6:
|
|
ret void
|
|
}
|
|
|
|
define zeroext i1 @test2_widget(i32* %arg) {
|
|
; CHECK-LABEL: define zeroext i1 @test2_widget(
|
|
bb:
|
|
%tmp1 = alloca i8, align 1
|
|
%tmp2 = alloca i32, align 4
|
|
call void @test2_quux()
|
|
; CHECK-NOT: call
|
|
;
|
|
; CHECK: call zeroext i1 @test2_widget(i32* @test2_global)
|
|
; CHECK-NEXT: br label %[[NEW_BB:.*]]
|
|
;
|
|
; CHECK: [[NEW_BB]]:
|
|
; CHECK-NEXT: call zeroext i1 @test2_widget(i32* @test2_global)
|
|
;
|
|
; CHECK: {{.*}}:
|
|
|
|
call void @test2_hoge.1(i32* %arg)
|
|
; CHECK-NEXT: call void @test2_hoge.1(
|
|
|
|
%tmp4 = call zeroext i1 @test2_barney(i32* %tmp2)
|
|
%tmp5 = zext i1 %tmp4 to i32
|
|
store i32 %tmp5, i32* %tmp2, align 4
|
|
%tmp6 = call zeroext i1 @test2_barney(i32* null)
|
|
call void @test2_ham(i8* %tmp1)
|
|
; CHECK: call void @test2_ham(
|
|
|
|
call void @test2_quux()
|
|
; CHECK-NOT: call
|
|
;
|
|
; CHECK: call zeroext i1 @test2_widget(i32* @test2_global)
|
|
; CHECK-NEXT: br label %[[NEW_BB:.*]]
|
|
;
|
|
; CHECK: [[NEW_BB]]:
|
|
; CHECK-NEXT: call zeroext i1 @test2_widget(i32* @test2_global)
|
|
;
|
|
; CHECK: {{.*}}:
|
|
ret i1 true
|
|
; CHECK-NEXT: ret i1 true
|
|
}
|
|
|
|
define internal void @test2_quux() {
|
|
; CHECK-NOT: @test2_quux
|
|
bb:
|
|
call void @test2_hoge(i1 (i32*)* @test2_widget)
|
|
ret void
|
|
}
|
|
|
|
declare void @test2_hoge.1(i32*)
|
|
|
|
declare zeroext i1 @test2_barney(i32*)
|
|
|
|
declare void @test2_ham(i8*)
|