296 lines
12 KiB
LLVM
296 lines
12 KiB
LLVM
; RUN: opt < %s -basic-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s --check-prefixes=CHECK,NO-PHI-VALUES
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; RUN: opt < %s -phi-values -basic-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s --check-prefixes=CHECK,PHI-VALUES
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; CHECK-LABEL: Function: simple: 5 pointers, 0 call sites
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; CHECK: NoAlias: float* %src1, float* %src2
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; CHECK: NoAlias: float* %phi, float* %src1
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; CHECK: MayAlias: float* %phi, float* %src2
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; CHECK: NoAlias: float* %next, float* %src1
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; CHECK: MayAlias: float* %next, float* %src2
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; CHECK: NoAlias: float* %next, float* %phi
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; CHECK: NoAlias: float* %g, float* %src1
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; CHECK: NoAlias: float* %g, float* %src2
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; CHECK: NoAlias: float* %g, float* %phi
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; CHECK: NoAlias: float* %g, float* %next
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define void @simple(float *%src1, float * noalias %src2, i32 %n) nounwind {
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entry:
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br label %loop
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loop:
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%phi = phi float* [ %src2, %entry ], [ %next, %loop ]
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%idx = phi i32 [ 0, %entry ], [ %idxn, %loop ]
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%next = getelementptr inbounds float, float* %phi, i32 1
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%g = getelementptr inbounds float, float* %src1, i32 3
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%l = load float, float* %phi
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%a = fadd float %l, 1.0
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store float %a, float* %g
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%idxn = add nsw nuw i32 %idx, 1
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%cmp5 = icmp eq i32 %idxn, %n
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br i1 %cmp5, label %end, label %loop
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end:
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ret void
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}
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; CHECK-LABEL: Function: notmust: 6 pointers, 0 call sites
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; CHECK: MustAlias: [2 x i32]* %tab, i8* %0
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; CHECK: PartialAlias: [2 x i32]* %tab, i32* %arrayidx
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; CHECK: NoAlias: i32* %arrayidx, i8* %0
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; CHECK: MustAlias: [2 x i32]* %tab, i32* %arrayidx1
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; CHECK: MustAlias: i32* %arrayidx1, i8* %0
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; CHECK: NoAlias: i32* %arrayidx, i32* %arrayidx1
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; CHECK: MayAlias: [2 x i32]* %tab, i32* %p.addr.05.i
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; CHECK: MayAlias: i32* %p.addr.05.i, i8* %0
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; CHECK: MayAlias: i32* %arrayidx, i32* %p.addr.05.i
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; CHECK: MayAlias: i32* %arrayidx1, i32* %p.addr.05.i
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; CHECK: MayAlias: [2 x i32]* %tab, i32* %incdec.ptr.i
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; CHECK: NoAlias: i32* %incdec.ptr.i, i8* %0
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; CHECK: MayAlias: i32* %arrayidx, i32* %incdec.ptr.i
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; CHECK: NoAlias: i32* %arrayidx1, i32* %incdec.ptr.i
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; CHECK: NoAlias: i32* %incdec.ptr.i, i32* %p.addr.05.i
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define i32 @notmust() nounwind {
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entry:
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%tab = alloca [2 x i32], align 4
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%0 = bitcast [2 x i32]* %tab to i8*
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%arrayidx = getelementptr inbounds [2 x i32], [2 x i32]* %tab, i32 0, i32 1
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store i32 0, i32* %arrayidx, align 4
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%arrayidx1 = getelementptr inbounds [2 x i32], [2 x i32]* %tab, i32 0, i32 0
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store i32 0, i32* %arrayidx1, align 4
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%1 = add i32 1, 1
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%cmp4.i = icmp slt i32 %1, 2
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br i1 %cmp4.i, label %while.body.i, label %f.exit
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while.body.i: ; preds = %while.body.i, %entry
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%2 = phi i32 [ 1, %while.body.i ], [ %1, %entry ]
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%foo.06.i = phi i32 [ %sub.i, %while.body.i ], [ 2, %entry ]
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%p.addr.05.i = phi i32* [ %incdec.ptr.i, %while.body.i ], [ %arrayidx1, %entry ]
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%sub.i = sub nsw i32 %foo.06.i, %2
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%incdec.ptr.i = getelementptr inbounds i32, i32* %p.addr.05.i, i32 1
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store i32 %sub.i, i32* %p.addr.05.i, align 4
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%cmp.i = icmp sgt i32 %sub.i, 1
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br i1 %cmp.i, label %while.body.i, label %f.exit
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f.exit: ; preds = %entry, %while.body.i
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%3 = load i32, i32* %arrayidx1, align 4
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%cmp = icmp eq i32 %3, 2
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%4 = load i32, i32* %arrayidx, align 4
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%cmp4 = icmp eq i32 %4, 1
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%or.cond = and i1 %cmp, %cmp4
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br i1 %or.cond, label %if.end, label %if.then
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if.then: ; preds = %f.exit
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unreachable
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if.end: ; preds = %f.exit
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ret i32 0
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}
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; CHECK-LABEL: Function: reverse: 6 pointers, 0 call sites
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; CHECK: MustAlias: [10 x i32]* %tab, i8* %0
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; CHECK: MustAlias: [10 x i32]* %tab, i32* %arrayidx
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; CHECK: MustAlias: i32* %arrayidx, i8* %0
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; CHECK: PartialAlias: [10 x i32]* %tab, i32* %arrayidx1
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; CHECK: NoAlias: i32* %arrayidx1, i8* %0
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; CHECK: NoAlias: i32* %arrayidx, i32* %arrayidx1
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; CHECK: MayAlias: [10 x i32]* %tab, i32* %p.addr.05.i
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; CHECK: MayAlias: i32* %p.addr.05.i, i8* %0
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; CHECK: MayAlias: i32* %arrayidx, i32* %p.addr.05.i
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; CHECK: MayAlias: i32* %arrayidx1, i32* %p.addr.05.i
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; CHECK: MayAlias: [10 x i32]* %tab, i32* %incdec.ptr.i
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; CHECK: MayAlias: i32* %incdec.ptr.i, i8* %0
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; CHECK: MayAlias: i32* %arrayidx, i32* %incdec.ptr.i
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; CHECK: MayAlias: i32* %arrayidx1, i32* %incdec.ptr.i
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; CHECK: NoAlias: i32* %incdec.ptr.i, i32* %p.addr.05.i
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define i32 @reverse() nounwind {
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entry:
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%tab = alloca [10 x i32], align 4
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%0 = bitcast [10 x i32]* %tab to i8*
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%arrayidx = getelementptr inbounds [10 x i32], [10 x i32]* %tab, i32 0, i32 0
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store i32 0, i32* %arrayidx, align 4
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%arrayidx1 = getelementptr inbounds [10 x i32], [10 x i32]* %tab, i32 0, i32 9
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store i32 0, i32* %arrayidx1, align 4
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%1 = add i32 1, 1
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%cmp4.i = icmp slt i32 %1, 2
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br i1 %cmp4.i, label %while.body.i, label %f.exit
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while.body.i: ; preds = %while.body.i, %entry
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%2 = phi i32 [ 1, %while.body.i ], [ %1, %entry ]
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%foo.06.i = phi i32 [ %sub.i, %while.body.i ], [ 2, %entry ]
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%p.addr.05.i = phi i32* [ %incdec.ptr.i, %while.body.i ], [ %arrayidx1, %entry ]
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%sub.i = sub nsw i32 %foo.06.i, %2
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%incdec.ptr.i = getelementptr inbounds i32, i32* %p.addr.05.i, i32 -1
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store i32 %sub.i, i32* %p.addr.05.i, align 4
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%cmp.i = icmp sgt i32 %sub.i, 1
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br i1 %cmp.i, label %while.body.i, label %f.exit
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f.exit: ; preds = %entry, %while.body.i
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%3 = load i32, i32* %arrayidx1, align 4
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%cmp = icmp eq i32 %3, 2
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%4 = load i32, i32* %arrayidx, align 4
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%cmp4 = icmp eq i32 %4, 1
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%or.cond = and i1 %cmp, %cmp4
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br i1 %or.cond, label %if.end, label %if.then
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if.then: ; preds = %f.exit
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unreachable
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if.end: ; preds = %f.exit
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ret i32 0
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}
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; CHECK-LABEL: Function: negative: 6 pointers, 1 call sites
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; CHECK: NoAlias: [3 x i16]* %int_arr.10, i16** %argv.6.par
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; CHECK: NoAlias: i16* %_tmp1, i16** %argv.6.par
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; CHECK: PartialAlias: [3 x i16]* %int_arr.10, i16* %_tmp1
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; CHECK: NoAlias: i16* %ls1.9.0, i16** %argv.6.par
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; CHECK: MayAlias: [3 x i16]* %int_arr.10, i16* %ls1.9.0
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; CHECK: MayAlias: i16* %_tmp1, i16* %ls1.9.0
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; CHECK: NoAlias: i16* %_tmp7, i16** %argv.6.par
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; CHECK: MayAlias: [3 x i16]* %int_arr.10, i16* %_tmp7
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; CHECK: MayAlias: i16* %_tmp1, i16* %_tmp7
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; CHECK: NoAlias: i16* %_tmp7, i16* %ls1.9.0
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; CHECK: NoAlias: i16* %_tmp11, i16** %argv.6.par
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; CHECK: PartialAlias: [3 x i16]* %int_arr.10, i16* %_tmp11
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; CHECK: NoAlias: i16* %_tmp1, i16* %_tmp11
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; CHECK: MayAlias: i16* %_tmp11, i16* %ls1.9.0
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; CHECK: MayAlias: i16* %_tmp11, i16* %_tmp7
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; CHECK: Both ModRef: Ptr: i16** %argv.6.par <-> %_tmp16 = call i16 @call(i32 %_tmp13)
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; CHECK: NoModRef: Ptr: [3 x i16]* %int_arr.10 <-> %_tmp16 = call i16 @call(i32 %_tmp13)
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; CHECK: NoModRef: Ptr: i16* %_tmp1 <-> %_tmp16 = call i16 @call(i32 %_tmp13)
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; CHECK: Both ModRef: Ptr: i16* %ls1.9.0 <-> %_tmp16 = call i16 @call(i32 %_tmp13)
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; CHECK: Both ModRef: Ptr: i16* %_tmp7 <-> %_tmp16 = call i16 @call(i32 %_tmp13)
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; CHECK: NoModRef: Ptr: i16* %_tmp11 <-> %_tmp16 = call i16 @call(i32 %_tmp13)
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define i16 @negative(i16 %argc.5.par, i16** nocapture readnone %argv.6.par) {
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%int_arr.10 = alloca [3 x i16], align 1
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%_tmp1 = getelementptr inbounds [3 x i16], [3 x i16]* %int_arr.10, i16 0, i16 2
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br label %bb1
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bb1: ; preds = %bb1, %0
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%i.7.0 = phi i16 [ 2, %0 ], [ %_tmp5, %bb1 ]
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%ls1.9.0 = phi i16* [ %_tmp1, %0 ], [ %_tmp7, %bb1 ]
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store i16 %i.7.0, i16* %ls1.9.0, align 1
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%_tmp5 = add nsw i16 %i.7.0, -1
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%_tmp7 = getelementptr i16, i16* %ls1.9.0, i16 -1
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%_tmp9 = icmp sgt i16 %i.7.0, 0
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br i1 %_tmp9, label %bb1, label %bb3
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bb3: ; preds = %bb1
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%_tmp11 = getelementptr inbounds [3 x i16], [3 x i16]* %int_arr.10, i16 0, i16 1
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%_tmp12 = load i16, i16* %_tmp11, align 1
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%_tmp13 = sext i16 %_tmp12 to i32
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%_tmp16 = call i16 @call(i32 %_tmp13)
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%_tmp18.not = icmp eq i16 %_tmp12, 1
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br i1 %_tmp18.not, label %bb5, label %bb4
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bb4: ; preds = %bb3
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ret i16 1
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bb5: ; preds = %bb3, %bb4
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ret i16 0
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}
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; CHECK-LABEL: Function: dynamic_offset
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; CHECK: NoAlias: i8* %a, i8* %p.base
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; CHECK: MayAlias: i8* %p, i8* %p.base
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; CHECK: NoAlias: i8* %a, i8* %p
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; CHECK: MayAlias: i8* %p.base, i8* %p.next
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; CHECK: NoAlias: i8* %a, i8* %p.next
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; CHECK: MayAlias: i8* %p, i8* %p.next
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define void @dynamic_offset(i1 %c, i8* noalias %p.base) {
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entry:
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%a = alloca i8
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br label %loop
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loop:
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%p = phi i8* [ %p.base, %entry ], [ %p.next, %loop ]
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%offset = call i16 @call(i32 0)
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%p.next = getelementptr inbounds i8, i8* %p, i16 %offset
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br i1 %c, label %loop, label %exit
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exit:
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ret void
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}
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; TODO: Currently yields an asymmetric result.
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; CHECK-LABEL: Function: symmetry
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; CHECK: MayAlias: i32* %p, i32* %p.base
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; CHECK: MayAlias: i32* %p.base, i32* %p.next
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; CHECK: NoAlias: i32* %p, i32* %p.next
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; CHECK: MayAlias: i32* %p.base, i32* %result
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; CHECK: NoAlias: i32* %p, i32* %result
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; CHECK: MustAlias: i32* %p.next, i32* %result
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define i32* @symmetry(i32* %p.base, i1 %c) {
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entry:
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br label %loop
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loop:
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%p = phi i32* [ %p.base, %entry ], [ %p.next, %loop ]
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%p.next = getelementptr inbounds i32, i32* %p, i32 1
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br i1 %c, label %loop, label %exit
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exit:
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%result = phi i32* [ %p.next, %loop ]
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ret i32* %result
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}
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; CHECK-LABEL: Function: nested_loop
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; CHECK: NoAlias: i8* %a, i8* %p.base
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; CHECK: NoAlias: i8* %a, i8* %p.outer
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; CHECK: NoAlias: i8* %a, i8* %p.outer.next
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; NO-PHI-VALUES: MayAlias: i8* %a, i8* %p.inner
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; PHI-VALUES: NoAlias: i8* %a, i8* %p.inner
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; CHECK: NoAlias: i8* %a, i8* %p.inner.next
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define void @nested_loop(i1 %c, i1 %c2, i8* noalias %p.base) {
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entry:
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%a = alloca i8
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br label %outer_loop
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outer_loop:
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%p.outer = phi i8* [ %p.base, %entry ], [ %p.outer.next, %outer_loop_latch ]
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br label %inner_loop
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inner_loop:
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%p.inner = phi i8* [ %p.outer, %outer_loop ], [ %p.inner.next, %inner_loop ]
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%p.inner.next = getelementptr inbounds i8, i8* %p.inner, i64 1
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br i1 %c, label %inner_loop, label %outer_loop_latch
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outer_loop_latch:
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%p.outer.next = getelementptr inbounds i8, i8* %p.inner, i64 10
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br i1 %c2, label %outer_loop, label %exit
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exit:
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ret void
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}
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; Same as the previous test case, but avoiding phi of phi.
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; CHECK-LABEL: Function: nested_loop2
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; CHECK: NoAlias: i8* %a, i8* %p.base
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; CHECK: NoAlias: i8* %a, i8* %p.outer
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; CHECK: NoAlias: i8* %a, i8* %p.outer.next
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; CHECK: MayAlias: i8* %a, i8* %p.inner
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; CHECK: NoAlias: i8* %a, i8* %p.inner.next
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; TODO: (a, p.inner) could be NoAlias
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define void @nested_loop2(i1 %c, i1 %c2, i8* noalias %p.base) {
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entry:
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%a = alloca i8
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br label %outer_loop
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outer_loop:
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%p.outer = phi i8* [ %p.base, %entry ], [ %p.outer.next, %outer_loop_latch ]
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%p.outer.next = getelementptr inbounds i8, i8* %p.outer, i64 10
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br label %inner_loop
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inner_loop:
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%p.inner = phi i8* [ %p.outer.next, %outer_loop ], [ %p.inner.next, %inner_loop ]
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%p.inner.next = getelementptr inbounds i8, i8* %p.inner, i64 1
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br i1 %c, label %inner_loop, label %outer_loop_latch
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outer_loop_latch:
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br i1 %c2, label %outer_loop, label %exit
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exit:
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ret void
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}
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declare i16 @call(i32)
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