must_be_executed_context.ll
15.6 KB
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -print-mustexecute -analyze 2>&1 | FileCheck %s --check-prefix=ME
; RUN: opt < %s -print-must-be-executed-contexts -analyze 2>&1 | FileCheck %s --check-prefix=MBEC
;
; void simple_conditional(int c) {
; A();
; B();
; if (c) {
; C();
; D();
; }
; E();
; F();
; G();
; }
;
; Best result:
; Start Instruction | Visit Set
; A | A, B, E, F
; B | A, B, E, F
; C | A, B, C, D, E, F
; D | A, B, C, D, E, F
; E | A, B, E, F
; F | A, B, E, F
; G | A, B, E, F, G
;
; FIXME: We miss the B -> E and backward exploration.
;
; There are no loops so print-mustexec will not do anything.
; ME-NOT: mustexec
;
define void @simple_conditional(i32 %arg) {
bb:
call void @A()
; MBEC: -- Explore context of: call void @A()
; MBEC-NEXT: [F: simple_conditional] call void @A()
; MBEC-NEXT: [F: simple_conditional] call void @B()
; MBEC-NEXT: [F: simple_conditional] %tmp = icmp eq i32 %arg, 0
; MBEC-NEXT: [F: simple_conditional] br i1 %tmp, label %bb2, label %bb1
; MBEC-NEXT: [F: simple_conditional] call void @E()
; MBEC-NEXT: [F: simple_conditional] call void @F()
; MBEC-NOT: call
call void @B()
; MBEC: -- Explore context of: call void @B()
; MBEC-NEXT: [F: simple_conditional] call void @B()
; MBEC-NEXT: [F: simple_conditional] %tmp = icmp eq i32 %arg, 0
; MBEC-NEXT: [F: simple_conditional] br i1 %tmp, label %bb2, label %bb1
; MBEC-NEXT: [F: simple_conditional] call void @E()
; MBEC-NEXT: [F: simple_conditional] call void @F()
; MBEC-NOT: call
; MBEC: -- Explore context of: %tmp
%tmp = icmp eq i32 %arg, 0
br i1 %tmp, label %bb2, label %bb1
bb1: ; preds = %bb
call void @C()
; MBEC: -- Explore context of: call void @C()
; MBEC-NEXT: [F: simple_conditional] call void @C()
; MBEC-NEXT: [F: simple_conditional] call void @D()
; MBEC-NEXT: [F: simple_conditional] br label %bb2
; MBEC-NEXT: [F: simple_conditional] call void @E()
; MBEC-NEXT: [F: simple_conditional] call void @F()
; MBEC-NOT: call
call void @D()
; MBEC: -- Explore context of: call void @D()
; MBEC-NEXT: [F: simple_conditional] call void @D()
; MBEC-NEXT: [F: simple_conditional] br label %bb2
; MBEC-NEXT: [F: simple_conditional] call void @E()
; MBEC-NEXT: [F: simple_conditional] call void @F()
; MBEC-NOT: call
; MBEC: -- Explore context of: br
br label %bb2
bb2: ; preds = %bb, %bb1
call void @E()
; MBEC: -- Explore context of: call void @E()
; MBEC-NEXT: [F: simple_conditional] call void @E()
; MBEC-NEXT: [F: simple_conditional] call void @F()
; MBEC-NOT: call
call void @F() ; might not return!
; MBEC: -- Explore context of: call void @F()
; MBEC-NEXT: [F: simple_conditional] call void @F()
; MBEC-NOT: call
call void @G()
; MBEC: -- Explore context of: call void @G()
; MBEC-NEXT: [F: simple_conditional] call void @G()
; MBEC-NEXT: [F: simple_conditional] ret void
; MBEC-NOT: call
; MBEC: -- Explore context of: ret
ret void
}
; void complex_loops_and_control(int c, int d) {
; A();
; while (1) {
; B();
; if (++c == d)
; C();
; if (++c == d)
; continue;
; D();
; if (++c == d)
; break;
; do {
; if (++c == d)
; continue;
; E();
; } while (++c == d);
; F();
; }
; G();
; }
;
; Best result:
; Start Instruction | Visit Set
; A | A, B
; B | A, B
; C | A, B, C
; D | A, B, D
; E | A, B, D, E, F
; F | A, B, D, F
; G | A, B, D, G
;
;
; ME: define void @complex_loops_and_control
define void @complex_loops_and_control(i32 %arg, i32 %arg1) {
bb:
call void @A()
; ME: call void @A()
; ME-NOT: mustexec
; ME-NEXT: br
; MBEC: -- Explore context of: call void @A()
; MBEC-NEXT: [F: complex_loops_and_control] call void @A()
; MBEC-NEXT: [F: complex_loops_and_control] br label %bb2
; MBEC-NEXT: [F: complex_loops_and_control] %.0 = phi i32 [ %arg, %bb ], [ %.0.be, %.backedge ]
; MBEC-NEXT: [F: complex_loops_and_control] call void @B()
; MBEC-NEXT: [F: complex_loops_and_control] %tmp = add nsw i32 %.0, 1
; MBEC-NEXT: [F: complex_loops_and_control] %tmp3 = icmp eq i32 %tmp, %arg1
; MBEC-NEXT: [F: complex_loops_and_control] br i1 %tmp3, label %bb4, label %bb5
; MBEC-NOT: call
; MBEC: -- Explore context of: br
br label %bb2
bb2: ; preds = %.backedge, %bb
%.0 = phi i32 [ %arg, %bb ], [ %.0.be, %.backedge ]
call void @B()
; ME: call void @B() ; (mustexec in: bb2)
; MBEC: -- Explore context of: call void @B()
; MBEC-NEXT: [F: complex_loops_and_control] call void @B()
; MBEC-NEXT: [F: complex_loops_and_control] %tmp = add nsw i32 %.0, 1
; MBEC-NEXT: [F: complex_loops_and_control] %tmp3 = icmp eq i32 %tmp, %arg1
; MBEC-NEXT: [F: complex_loops_and_control] br i1 %tmp3, label %bb4, label %bb5
; MBEC-NOT: call
; MBEC: -- Explore context of: %tmp
%tmp = add nsw i32 %.0, 1
%tmp3 = icmp eq i32 %tmp, %arg1
br i1 %tmp3, label %bb4, label %bb5
bb4: ; preds = %bb2
call void @C()
; ME: call void @C()
; ME-NOT: mustexec
; ME-NEXT: br
; FIXME: Missing A and B (backward)
; MBEC: -- Explore context of: call void @C()
; MBEC-NEXT: [F: complex_loops_and_control] call void @C()
; MBEC-NEXT: [F: complex_loops_and_control] br label %bb5
; MBEC-NEXT: [F: complex_loops_and_control] %tmp6 = add nsw i32 %.0, 2
; MBEC-NEXT: [F: complex_loops_and_control] %tmp7 = icmp eq i32 %tmp6, %arg1
; MBEC-NEXT: [F: complex_loops_and_control] br i1 %tmp7, label %bb8, label %bb9
; MBEC-NOT: call
; MBEC: -- Explore context of: br
br label %bb5
bb5: ; preds = %bb4, %bb2
%tmp6 = add nsw i32 %.0, 2
%tmp7 = icmp eq i32 %tmp6, %arg1
br i1 %tmp7, label %bb8, label %bb9
bb8: ; preds = %bb5
br label %.backedge
.backedge: ; preds = %bb8, %bb22
%.0.be = phi i32 [ %tmp6, %bb8 ], [ %.lcssa, %bb22 ]
br label %bb2
bb9: ; preds = %bb5
call void @D()
; ME: call void @D()
; ME-NOT: mustexec
; ME-NEXT: %tmp10
; FIXME: Missing A and B (backward)
; MBEC: -- Explore context of: call void @D()
; MBEC-NEXT: [F: complex_loops_and_control] call void @D()
; MBEC-NEXT: [F: complex_loops_and_control] %tmp10 = add nsw i32 %.0, 3
; MBEC-NEXT: [F: complex_loops_and_control] %tmp11 = icmp eq i32 %tmp10, %arg1
; MBEC-NEXT: [F: complex_loops_and_control] br i1 %tmp11, label %bb12, label %bb13
; MBEC-NOT: call
; MBEC: -- Explore context of: %tmp10
%tmp10 = add nsw i32 %.0, 3
%tmp11 = icmp eq i32 %tmp10, %arg1
br i1 %tmp11, label %bb12, label %bb13
bb12: ; preds = %bb9
br label %bb23
bb13: ; preds = %bb9
br label %bb14
bb14: ; preds = %bb19, %bb13
%.1 = phi i32 [ %tmp10, %bb13 ], [ %tmp20, %bb19 ]
%tmp15 = add nsw i32 %.1, 1
%tmp16 = icmp eq i32 %tmp15, %arg1
br i1 %tmp16, label %bb17, label %bb18
bb17: ; preds = %bb14
br label %bb19
bb18: ; preds = %bb14
call void @E()
; ME: call void @E()
; ME-NOT: mustexec
; ME-NEXT: br
; FIXME: Missing A, B, and D (backward), as well as F
; MBEC: -- Explore context of: call void @E()
; MBEC-NEXT: [F: complex_loops_and_control] call void @E()
; MBEC-NEXT: [F: complex_loops_and_control] br label %bb19
; MBEC-NEXT: [F: complex_loops_and_control] %tmp20 = add nsw i32 %.1, 2
; MBEC-NEXT: [F: complex_loops_and_control] %tmp21 = icmp eq i32 %tmp20, %arg1
; MBEC-NEXT: [F: complex_loops_and_control] br i1 %tmp21, label %bb14, label %bb22
; MBEC-NOT: call
; MBEC: -- Explore context of: br
br label %bb19
bb19: ; preds = %bb18, %bb17
%tmp20 = add nsw i32 %.1, 2
%tmp21 = icmp eq i32 %tmp20, %arg1
br i1 %tmp21, label %bb14, label %bb22
bb22: ; preds = %bb19
%.lcssa = phi i32 [ %tmp20, %bb19 ]
call void @F()
; ME: call void @F()
; ME-NOT: mustexec
; ME-NEXT: br
; FIXME: Missing A, B, and D (backward)
; MBEC: -- Explore context of: call void @F()
; MBEC-NEXT: [F: complex_loops_and_control] call void @F()
; MBEC-NOT: call
; MBEC: -- Explore context of: br
br label %.backedge
bb23: ; preds = %bb12
call void @G()
; ME: call void @G()
; ME-NOT: mustexec
; ME-NEXT: ret
; FIXME: Missing A, B, and D (backward)
; MBEC: -- Explore context of: call void @G()
; MBEC-NEXT: [F: complex_loops_and_control] call void @G()
; MBEC-NEXT: [F: complex_loops_and_control] ret void
; MBEC-NOT: call
; MBEC: -- Explore context of: ret
ret void
}
declare void @A() nounwind willreturn
declare void @B() nounwind willreturn
declare void @C() nounwind willreturn
declare void @D() nounwind willreturn
declare void @E() nounwind willreturn
declare void @F() nounwind
declare void @G() nounwind willreturn
declare i32 @g(i32*) nounwind willreturn
declare void @h(i32*) nounwind willreturn
define i32 @nonnull_exec_ctx_1(i32* %a, i32 %b) {
; MBEC: -- Explore context of: %tmp3 = icmp eq i32 %b, 0
; MBEC-NEXT: [F: nonnull_exec_ctx_1] %tmp3 = icmp eq i32 %b, 0
; MBEC-NEXT: [F: nonnull_exec_ctx_1] br i1 %tmp3, label %ex, label %hd
; MBEC-NEXT: -- Explore context of: br i1 %tmp3, label %ex, label %hd
; MBEC-NEXT: [F: nonnull_exec_ctx_1] br i1 %tmp3, label %ex, label %hd
; MBEC-NEXT: -- Explore context of: %tmp5 = tail call i32 @g(i32* nonnull %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_1] %tmp5 = tail call i32 @g(i32* nonnull %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_1] ret i32 %tmp5
; MBEC-NEXT: -- Explore context of: ret i32 %tmp5
; MBEC-NEXT: [F: nonnull_exec_ctx_1] ret i32 %tmp5
; MBEC-NEXT: -- Explore context of: %tmp7 = phi i32 [ %tmp8, %hd ], [ 0, %en ]
; MBEC-NEXT: [F: nonnull_exec_ctx_1] %tmp7 = phi i32 [ %tmp8, %hd ], [ 0, %en ]
; MBEC-NEXT: [F: nonnull_exec_ctx_1] tail call void @h(i32* %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_1] %tmp8 = add nuw i32 %tmp7, 1
; MBEC-NEXT: [F: nonnull_exec_ctx_1] %tmp9 = icmp eq i32 %tmp8, %b
; MBEC-NEXT: [F: nonnull_exec_ctx_1] br i1 %tmp9, label %ex, label %hd
; MBEC-NEXT: -- Explore context of: tail call void @h(i32* %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_1] tail call void @h(i32* %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_1] %tmp8 = add nuw i32 %tmp7, 1
; MBEC-NEXT: [F: nonnull_exec_ctx_1] %tmp9 = icmp eq i32 %tmp8, %b
; MBEC-NEXT: [F: nonnull_exec_ctx_1] br i1 %tmp9, label %ex, label %hd
; MBEC-NEXT: -- Explore context of: %tmp8 = add nuw i32 %tmp7, 1
; MBEC-NEXT: [F: nonnull_exec_ctx_1] %tmp8 = add nuw i32 %tmp7, 1
; MBEC-NEXT: [F: nonnull_exec_ctx_1] %tmp9 = icmp eq i32 %tmp8, %b
; MBEC-NEXT: [F: nonnull_exec_ctx_1] br i1 %tmp9, label %ex, label %hd
; MBEC-NEXT: -- Explore context of: %tmp9 = icmp eq i32 %tmp8, %b
; MBEC-NEXT: [F: nonnull_exec_ctx_1] %tmp9 = icmp eq i32 %tmp8, %b
; MBEC-NEXT: [F: nonnull_exec_ctx_1] br i1 %tmp9, label %ex, label %hd
; MBEC-NEXT: -- Explore context of: br i1 %tmp9, label %ex, label %hd
; MBEC-NEXT: [F: nonnull_exec_ctx_1] br i1 %tmp9, label %ex, label %hd
en:
%tmp3 = icmp eq i32 %b, 0
br i1 %tmp3, label %ex, label %hd
ex:
%tmp5 = tail call i32 @g(i32* nonnull %a)
ret i32 %tmp5
hd:
%tmp7 = phi i32 [ %tmp8, %hd ], [ 0, %en ]
tail call void @h(i32* %a)
%tmp8 = add nuw i32 %tmp7, 1
%tmp9 = icmp eq i32 %tmp8, %b
br i1 %tmp9, label %ex, label %hd
}
define i32 @nonnull_exec_ctx_2(i32* %a, i32 %b) nounwind willreturn {
; MBEC: -- Explore context of: %tmp3 = icmp eq i32 %b, 0
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp3 = icmp eq i32 %b, 0
; MBEC-NEXT: [F: nonnull_exec_ctx_2] br i1 %tmp3, label %ex, label %hd
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp5 = tail call i32 @g(i32* nonnull %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_2] ret i32 %tmp5
; MBEC-NEXT: -- Explore context of: br i1 %tmp3, label %ex, label %hd
; MBEC-NEXT: [F: nonnull_exec_ctx_2] br i1 %tmp3, label %ex, label %hd
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp5 = tail call i32 @g(i32* nonnull %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_2] ret i32 %tmp5
; MBEC-NEXT: -- Explore context of: %tmp5 = tail call i32 @g(i32* nonnull %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp5 = tail call i32 @g(i32* nonnull %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_2] ret i32 %tmp5
; MBEC-NEXT: -- Explore context of: ret i32 %tmp5
; MBEC-NEXT: [F: nonnull_exec_ctx_2] ret i32 %tmp5
; MBEC-NEXT: -- Explore context of: %tmp7 = phi i32 [ %tmp8, %hd ], [ 0, %en ]
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp7 = phi i32 [ %tmp8, %hd ], [ 0, %en ]
; MBEC-NEXT: [F: nonnull_exec_ctx_2] tail call void @h(i32* %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp8 = add nuw i32 %tmp7, 1
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp9 = icmp eq i32 %tmp8, %b
; MBEC-NEXT: [F: nonnull_exec_ctx_2] br i1 %tmp9, label %ex, label %hd
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp5 = tail call i32 @g(i32* nonnull %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_2] ret i32 %tmp5
; MBEC-NEXT: -- Explore context of: tail call void @h(i32* %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_2] tail call void @h(i32* %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp8 = add nuw i32 %tmp7, 1
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp9 = icmp eq i32 %tmp8, %b
; MBEC-NEXT: [F: nonnull_exec_ctx_2] br i1 %tmp9, label %ex, label %hd
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp5 = tail call i32 @g(i32* nonnull %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_2] ret i32 %tmp5
; MBEC-NEXT: -- Explore context of: %tmp8 = add nuw i32 %tmp7, 1
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp8 = add nuw i32 %tmp7, 1
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp9 = icmp eq i32 %tmp8, %b
; MBEC-NEXT: [F: nonnull_exec_ctx_2] br i1 %tmp9, label %ex, label %hd
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp5 = tail call i32 @g(i32* nonnull %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_2] ret i32 %tmp5
; MBEC-NEXT: -- Explore context of: %tmp9 = icmp eq i32 %tmp8, %b
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp9 = icmp eq i32 %tmp8, %b
; MBEC-NEXT: [F: nonnull_exec_ctx_2] br i1 %tmp9, label %ex, label %hd
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp5 = tail call i32 @g(i32* nonnull %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_2] ret i32 %tmp5
; MBEC-NEXT: -- Explore context of: br i1 %tmp9, label %ex, label %hd
; MBEC-NEXT: [F: nonnull_exec_ctx_2] br i1 %tmp9, label %ex, label %hd
; MBEC-NEXT: [F: nonnull_exec_ctx_2] %tmp5 = tail call i32 @g(i32* nonnull %a)
; MBEC-NEXT: [F: nonnull_exec_ctx_2] ret i32 %tmp5
en:
%tmp3 = icmp eq i32 %b, 0
br i1 %tmp3, label %ex, label %hd
ex:
%tmp5 = tail call i32 @g(i32* nonnull %a)
ret i32 %tmp5
hd:
%tmp7 = phi i32 [ %tmp8, %hd ], [ 0, %en ]
tail call void @h(i32* %a)
%tmp8 = add nuw i32 %tmp7, 1
%tmp9 = icmp eq i32 %tmp8, %b
br i1 %tmp9, label %ex, label %hd
}