c23b4fbdbb
Now that #149310 has restricted lifetime intrinsics to only work on allocas, we can also drop the explicit size argument. Instead, the size is implied by the alloca. This removes the ability to only mark a prefix of an alloca alive/dead. We never used that capability, so we should remove the need to handle that possibility everywhere (though many key places, including stack coloring, did not actually respect this).
111 lines
4.8 KiB
LLVM
111 lines
4.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; PR23538
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; RUN: opt < %s -passes=indvars,loop-deletion -S | FileCheck %s
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; Check IndVarSimplify should not replace exit value because or else
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; udiv will be introduced by expand and the cost will be high.
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declare void @_Z3mixRjj(ptr dereferenceable(4), i32)
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declare void @llvm.lifetime.start.p0(ptr nocapture)
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declare void @llvm.lifetime.end.p0(ptr nocapture)
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define i32 @_Z3fooPKcjj(ptr nocapture readonly %s, i32 %len, i32 %c) {
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; CHECK-LABEL: @_Z3fooPKcjj(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[A]])
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; CHECK-NEXT: store i32 -1640531527, ptr [[A]], align 4
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; CHECK-NEXT: [[CMP8:%.*]] = icmp ugt i32 [[LEN:%.*]], 11
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; CHECK-NEXT: br i1 [[CMP8]], label [[WHILE_BODY_LR_PH:%.*]], label [[WHILE_END:%.*]]
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; CHECK: while.body.lr.ph:
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; CHECK-NEXT: br label [[WHILE_BODY:%.*]]
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; CHECK: while.body:
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; CHECK-NEXT: [[KEYLEN_010:%.*]] = phi i32 [ [[LEN]], [[WHILE_BODY_LR_PH]] ], [ [[SUB:%.*]], [[WHILE_BODY]] ]
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; CHECK-NEXT: [[S_ADDR_09:%.*]] = phi ptr [ [[S:%.*]], [[WHILE_BODY_LR_PH]] ], [ [[ADD_PTR:%.*]], [[WHILE_BODY]] ]
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; CHECK-NEXT: [[T2:%.*]] = load i32, ptr [[S_ADDR_09]], align 4
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; CHECK-NEXT: [[SHL_I:%.*]] = shl i32 [[T2]], 1
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; CHECK-NEXT: [[AND_I:%.*]] = and i32 [[SHL_I]], 16843008
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; CHECK-NEXT: [[T3:%.*]] = load i32, ptr [[A]], align 4
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; CHECK-NEXT: [[SUB_I:%.*]] = add i32 [[T3]], [[T2]]
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; CHECK-NEXT: [[ADD:%.*]] = sub i32 [[SUB_I]], [[AND_I]]
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; CHECK-NEXT: store i32 [[ADD]], ptr [[A]], align 4
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; CHECK-NEXT: [[ADD_PTR]] = getelementptr inbounds i8, ptr [[S_ADDR_09]], i64 12
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; CHECK-NEXT: [[SUB]] = add i32 [[KEYLEN_010]], -12
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[SUB]], 11
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; CHECK-NEXT: br i1 [[CMP]], label [[WHILE_BODY]], label [[WHILE_COND_WHILE_END_CRIT_EDGE:%.*]]
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; CHECK: while.cond.while.end_crit_edge:
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; CHECK-NEXT: [[SUB_LCSSA:%.*]] = phi i32 [ [[SUB]], [[WHILE_BODY]] ]
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; CHECK-NEXT: br label [[WHILE_END]]
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; CHECK: while.end:
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; CHECK-NEXT: [[KEYLEN_0_LCSSA:%.*]] = phi i32 [ [[SUB_LCSSA]], [[WHILE_COND_WHILE_END_CRIT_EDGE]] ], [ [[LEN]], [[ENTRY:%.*]] ]
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; CHECK-NEXT: call void @_Z3mixRjj(ptr dereferenceable(4) [[A]], i32 [[KEYLEN_0_LCSSA]])
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; CHECK-NEXT: [[T4:%.*]] = load i32, ptr [[A]], align 4
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr [[A]])
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; CHECK-NEXT: ret i32 [[T4]]
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;
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entry:
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%a = alloca i32, align 4
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call void @llvm.lifetime.start.p0(ptr %a)
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store i32 -1640531527, ptr %a, align 4
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%cmp8 = icmp ugt i32 %len, 11
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br i1 %cmp8, label %while.body.lr.ph, label %while.end
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while.body.lr.ph: ; preds = %entry
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br label %while.body
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while.body: ; preds = %while.body, %while.body.lr.ph
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%keylen.010 = phi i32 [ %len, %while.body.lr.ph ], [ %sub, %while.body ]
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%s.addr.09 = phi ptr [ %s, %while.body.lr.ph ], [ %add.ptr, %while.body ]
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%t2 = load i32, ptr %s.addr.09, align 4
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%shl.i = shl i32 %t2, 1
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%and.i = and i32 %shl.i, 16843008
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%t3 = load i32, ptr %a, align 4
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%sub.i = add i32 %t3, %t2
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%add = sub i32 %sub.i, %and.i
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store i32 %add, ptr %a, align 4
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%add.ptr = getelementptr inbounds i8, ptr %s.addr.09, i64 12
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%sub = add i32 %keylen.010, -12
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%cmp = icmp ugt i32 %sub, 11
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br i1 %cmp, label %while.body, label %while.cond.while.end_crit_edge
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while.cond.while.end_crit_edge: ; preds = %while.body
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%sub.lcssa = phi i32 [ %sub, %while.body ]
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br label %while.end
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while.end: ; preds = %while.cond.while.end_crit_edge, %entry
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%keylen.0.lcssa = phi i32 [ %sub.lcssa, %while.cond.while.end_crit_edge ], [ %len, %entry ]
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call void @_Z3mixRjj(ptr dereferenceable(4) %a, i32 %keylen.0.lcssa)
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%t4 = load i32, ptr %a, align 4
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call void @llvm.lifetime.end.p0(ptr %a)
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ret i32 %t4
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}
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define i32 @zero_backedge_count_test(i32 %unknown_init, ptr %unknown_mem) {
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; CHECK-LABEL: @zero_backedge_count_test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[UNKNOWN_NEXT:%.*]] = load volatile i32, ptr [[UNKNOWN_MEM:%.*]], align 4
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; CHECK-NEXT: br label [[LEAVE:%.*]]
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; CHECK: leave:
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; CHECK-NEXT: ret i32 [[UNKNOWN_INIT:%.*]]
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;
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entry:
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry], [ %iv.inc, %loop ]
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%unknown_phi = phi i32 [ %unknown_init, %entry ], [ %unknown_next, %loop ]
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%iv.inc = add i32 %iv, 1
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%be_taken = icmp ne i32 %iv.inc, 1
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%unknown_next = load volatile i32, ptr %unknown_mem
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br i1 %be_taken, label %loop, label %leave
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leave:
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; We can fold %unknown_phi even though the backedge value for it is completely
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; unknown, since we can prove that the loop's backedge taken count is 0.
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%exit_val = phi i32 [ %unknown_phi, %loop ]
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ret i32 %exit_val
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}
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