mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-14 11:32:34 +00:00
9ceebb7e92
simplification has been performed. This is a bit less efficient (requires another ilist walk of the basic blocks) but shouldn't matter in practice. More importantly, it's just too much work to keep track of all the various ways the return instructions can be mutated while simplifying them. This fixes yet another crasher, reported by Daniel Dunbar. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154179 91177308-0d34-0410-b5e6-96231b3b80d8
214 lines
4.7 KiB
LLVM
214 lines
4.7 KiB
LLVM
; Test that the inliner doesn't leave around dead allocas, and that it folds
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; uncond branches away after it is done specializing.
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; RUN: opt < %s -inline -S | FileCheck %s
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@A = weak global i32 0 ; <i32*> [#uses=1]
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@B = weak global i32 0 ; <i32*> [#uses=1]
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@C = weak global i32 0 ; <i32*> [#uses=1]
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define internal fastcc void @foo(i32 %X) {
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entry:
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%ALL = alloca i32, align 4 ; <i32*> [#uses=1]
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%tmp1 = and i32 %X, 1 ; <i32> [#uses=1]
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%tmp1.upgrd.1 = icmp eq i32 %tmp1, 0 ; <i1> [#uses=1]
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br i1 %tmp1.upgrd.1, label %cond_next, label %cond_true
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cond_true: ; preds = %entry
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store i32 1, i32* @A
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br label %cond_next
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cond_next: ; preds = %cond_true, %entry
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%tmp4 = and i32 %X, 2 ; <i32> [#uses=1]
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%tmp4.upgrd.2 = icmp eq i32 %tmp4, 0 ; <i1> [#uses=1]
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br i1 %tmp4.upgrd.2, label %cond_next7, label %cond_true5
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cond_true5: ; preds = %cond_next
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store i32 1, i32* @B
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br label %cond_next7
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cond_next7: ; preds = %cond_true5, %cond_next
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%tmp10 = and i32 %X, 4 ; <i32> [#uses=1]
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%tmp10.upgrd.3 = icmp eq i32 %tmp10, 0 ; <i1> [#uses=1]
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br i1 %tmp10.upgrd.3, label %cond_next13, label %cond_true11
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cond_true11: ; preds = %cond_next7
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store i32 1, i32* @C
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br label %cond_next13
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cond_next13: ; preds = %cond_true11, %cond_next7
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%tmp16 = and i32 %X, 8 ; <i32> [#uses=1]
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%tmp16.upgrd.4 = icmp eq i32 %tmp16, 0 ; <i1> [#uses=1]
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br i1 %tmp16.upgrd.4, label %UnifiedReturnBlock, label %cond_true17
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cond_true17: ; preds = %cond_next13
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call void @ext( i32* %ALL )
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ret void
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UnifiedReturnBlock: ; preds = %cond_next13
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ret void
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}
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declare void @ext(i32*)
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define void @test() {
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; CHECK: @test
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; CHECK-NOT: ret
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;
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; FIXME: This should be a CHECK-NOT, but currently we have a bug that causes us
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; to not nuke unused allocas.
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; CHECK: alloca
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; CHECK-NOT: ret
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;
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; No branches should survive the inliner's cleanup.
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; CHECK-NOT: br
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; CHECK: ret void
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entry:
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tail call fastcc void @foo( i32 1 )
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tail call fastcc void @foo( i32 2 )
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tail call fastcc void @foo( i32 3 )
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tail call fastcc void @foo( i32 8 )
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ret void
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}
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declare void @f(i32 %x)
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define void @inner2(i32 %x, i32 %y, i32 %z, i1 %b) {
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entry:
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%cmp1 = icmp ne i32 %x, 0
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br i1 %cmp1, label %then1, label %end1
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then1:
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call void @f(i32 %x)
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br label %end1
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end1:
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%x2 = and i32 %x, %z
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%cmp2 = icmp sgt i32 %x2, 1
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br i1 %cmp2, label %then2, label %end2
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then2:
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call void @f(i32 %x2)
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br label %end2
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end2:
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%y2 = or i32 %y, %z
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%cmp3 = icmp sgt i32 %y2, 0
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br i1 %cmp3, label %then3, label %end3
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then3:
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call void @f(i32 %y2)
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br label %end3
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end3:
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br i1 %b, label %end3.1, label %end3.2
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end3.1:
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%x3.1 = or i32 %x, 10
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br label %end3.3
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end3.2:
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%x3.2 = or i32 %x, 10
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br label %end3.3
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end3.3:
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%x3.3 = phi i32 [ %x3.1, %end3.1 ], [ %x3.2, %end3.2 ]
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%cmp4 = icmp slt i32 %x3.3, 1
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br i1 %cmp4, label %then4, label %end4
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then4:
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call void @f(i32 %x3.3)
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br label %end4
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end4:
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ret void
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}
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define void @outer2(i32 %z, i1 %b) {
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; Ensure that after inlining, none of the blocks with a call to @f actually
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; make it through inlining.
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; CHECK: define void @outer2
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; CHECK-NOT: call
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; CHECK: ret void
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entry:
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call void @inner2(i32 0, i32 -1, i32 %z, i1 %b)
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ret void
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}
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define void @PR12470_inner(i16 signext %p1) nounwind uwtable {
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entry:
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br i1 undef, label %cond.true, label %cond.false
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cond.true:
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br label %cond.end
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cond.false:
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%conv = sext i16 %p1 to i32
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br label %cond.end
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cond.end:
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%cond = phi i32 [ undef, %cond.true ], [ 0, %cond.false ]
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%tobool = icmp eq i32 %cond, 0
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br i1 %tobool, label %if.end5, label %if.then
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if.then:
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ret void
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if.end5:
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ret void
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}
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define void @PR12470_outer() {
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; This previously crashed during inliner cleanup and folding inner return
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; instructions. Check that we don't crash and we produce a function with a single
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; return instruction due to merging the returns of the inlined function.
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; CHECK: define void @PR12470_outer
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; CHECK-NOT: call
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; CHECK: ret void
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; CHECK-NOT: ret void
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; CHECK: }
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entry:
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call void @PR12470_inner(i16 signext 1)
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ret void
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}
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define void @crasher_inner() nounwind uwtable {
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entry:
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br i1 false, label %for.end28, label %for.body6
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for.body6:
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br i1 undef, label %for.body6, label %for.cond12.for.inc26_crit_edge
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for.cond12.for.inc26_crit_edge:
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br label %for.body6.1
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for.end28:
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ret void
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for.body6.1:
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br i1 undef, label %for.body6.1, label %for.cond12.for.inc26_crit_edge.1
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for.cond12.for.inc26_crit_edge.1:
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br label %for.body6.2
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for.body6.2:
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br i1 undef, label %for.body6.2, label %for.cond12.for.inc26_crit_edge.2
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for.cond12.for.inc26_crit_edge.2:
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br label %for.end28
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}
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define void @crasher_outer() {
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; CHECK: @crasher_outer
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; CHECK-NOT: call
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; CHECK: ret void
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; CHECK-NOT: ret
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; CHECK: }
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entry:
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tail call void @crasher_inner()
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ret void
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}
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