e9d34c5429
All transforms of IndVars have prerequisite requirement of LCSSA and LoopSimplify form and rely on it. Added test that shows that this actually stands.
165 lines
6.6 KiB
LLVM
165 lines
6.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: -p
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; RUN: opt < %s -indvars -S | FileCheck %s
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; RUN: opt < %s -passes=indvars -S | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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declare i1 @foo(i8*, i8*)
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declare i1 @bar()
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declare i1 @baz()
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define i1 @kill_backedge_and_phis(i8* align 1 %lhs, i8* align 1 %rhs, i32 %len) {
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; CHECK-LABEL: @kill_backedge_and_phis(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: %length_not_zero = icmp ne i32 %len, 0
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; CHECK-NEXT: br i1 %length_not_zero, label %loop_preheader, label %exit
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; CHECK: loop_preheader:
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; CHECK-NEXT: br label %loop
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; CHECK: loop:
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; CHECK-NEXT: %iv.next = add nuw nsw i32 0, 1
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; CHECK-NEXT: %left_ptr = getelementptr inbounds i8, i8* %lhs, i32 0
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; CHECK-NEXT: %right_ptr = getelementptr inbounds i8, i8* %rhs, i32 0
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; CHECK-NEXT: %result = call i1 @foo(i8* %left_ptr, i8* %right_ptr)
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; CHECK-NEXT: br i1 %result, label %exiting_1, label %exit.loopexit
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; CHECK: exiting_1:
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; CHECK-NEXT: %iv.wide.is_not_zero = icmp ne i64 0, 0
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; CHECK-NEXT: br i1 false, label %exiting_2, label %exit.loopexit
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; CHECK: exiting_2:
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; CHECK-NEXT: %bar_ret = call i1 @bar()
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; CHECK-NEXT: br i1 %bar_ret, label %exit.loopexit, label %exiting_3
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; CHECK: exiting_3:
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; CHECK-NEXT: %baz_ret = call i1 @baz()
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; CHECK-NEXT: %continue = icmp ne i32 %iv.next, %len
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; CHECK-NEXT: %or.cond = select i1 %baz_ret, i1 %continue, i1 false
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; CHECK-NEXT: br i1 %or.cond, label %loop, label %exit.loopexit
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; CHECK: exit.loopexit:
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; CHECK-NEXT: %val.ph = phi i1 [ %baz_ret, %exiting_3 ], [ %bar_ret, %exiting_2 ], [ %iv.wide.is_not_zero, %exiting_1 ], [ %result, %loop ]
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; CHECK-NEXT: br label %exit
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; CHECK: exit:
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; CHECK-NEXT: %val = phi i1 [ false, %entry ], [ %val.ph, %exit.loopexit ]
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; CHECK-NEXT: ret i1 %val
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;
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entry:
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%length_not_zero = icmp ne i32 %len, 0
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br i1 %length_not_zero, label %loop_preheader, label %exit
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loop_preheader:
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br label %loop
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loop:
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%iv = phi i32 [ 0, %loop_preheader ], [ %iv.next, %latch ]
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%iv.wide = phi i64 [ 0, %loop_preheader ], [ %iv.wide.next, %latch ]
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%iv.next = add i32 %iv, 1
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%iv.wide.next = add i64 %iv.wide, 1
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%left_ptr = getelementptr inbounds i8, i8* %lhs, i32 %iv
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%right_ptr = getelementptr inbounds i8, i8* %rhs, i32 %iv
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%result = call i1 @foo(i8* %left_ptr, i8* %right_ptr)
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br i1 %result, label %exiting_1, label %exit
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exiting_1:
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%iv.wide.is_not_zero = icmp ne i64 %iv.wide, 0
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br i1 %iv.wide.is_not_zero, label %exiting_2, label %exit
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exiting_2:
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%bar_ret = call i1 @bar()
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br i1 %bar_ret, label %exit, label %exiting_3
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exiting_3:
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%baz_ret = call i1 @baz()
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br i1 %baz_ret, label %latch, label %exit
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latch:
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%continue = icmp ne i32 %iv.next, %len
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br i1 %continue, label %loop, label %exit
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exit:
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%val = phi i1 [ %result, %loop ], [ %iv.wide.is_not_zero, %exiting_1 ],
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[ %bar_ret, %exiting_2 ], [ %baz_ret, %exiting_3 ],
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[ %baz_ret, %latch ], [ 0, %entry ]
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ret i1 %val
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}
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define i1 @siblings(i8* align 1 %lhs, i8* align 1 %rhs, i32 %len) {
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; CHECK-LABEL: @siblings(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: %length_not_zero = icmp ne i32 %len, 0
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; CHECK-NEXT: br i1 %length_not_zero, label %weird_loop.preheader, label %exit
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; CHECK: weird_loop.preheader:
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; CHECK-NEXT: br label %weird_loop
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; CHECK: weird_loop:
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; CHECK-NEXT: %weird.iv = phi i32 [ %weird.iv.next, %weird_loop ], [ 0, %weird_loop.preheader ]
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; CHECK-NEXT: %weird.iv.next = add i32 %weird.iv, 1
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; CHECK-NEXT: %weird.iv.wide = zext i32 %weird.iv to i64
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; CHECK-NEXT: %weird.cond = call i1 @bar()
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; CHECK-NEXT: br i1 %weird.cond, label %weird_loop, label %loop.preheader
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; CHECK: loop.preheader:
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; CHECK-NEXT: %weird.iv.lcssa = phi i32 [ %weird.iv, %weird_loop ]
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; CHECK-NEXT: %weird.iv.wide.lcssa = phi i64 [ %weird.iv.wide, %weird_loop ]
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; CHECK-NEXT: br label %loop
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; CHECK: loop:
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; CHECK-NEXT: %iv.next = add i32 %weird.iv.lcssa, 1
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; CHECK-NEXT: %left_ptr = getelementptr inbounds i8, i8* %lhs, i32 %weird.iv.lcssa
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; CHECK-NEXT: %right_ptr = getelementptr inbounds i8, i8* %rhs, i32 %weird.iv.lcssa
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; CHECK-NEXT: %result = call i1 @foo(i8* %left_ptr, i8* %right_ptr)
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; CHECK-NEXT: br i1 %result, label %exiting_1, label %exit.loopexit
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; CHECK: exiting_1:
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; CHECK-NEXT: %iv.wide.is_not_zero = icmp ne i64 %weird.iv.wide.lcssa, %weird.iv.wide.lcssa
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; CHECK-NEXT: br i1 false, label %exiting_2, label %exit.loopexit
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; CHECK: exiting_2:
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; CHECK-NEXT: %bar_ret = call i1 @bar()
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; CHECK-NEXT: br i1 %bar_ret, label %exit.loopexit, label %exiting_3
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; CHECK: exiting_3:
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; CHECK-NEXT: %baz_ret = call i1 @baz()
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; CHECK-NEXT: %continue = icmp ne i32 %iv.next, %len
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; CHECK-NEXT: %or.cond = select i1 %baz_ret, i1 %continue, i1 false
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; CHECK-NEXT: br i1 %or.cond, label %loop, label %exit.loopexit
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; CHECK: exit.loopexit:
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; CHECK-NEXT: %val.ph = phi i1 [ %baz_ret, %exiting_3 ], [ %bar_ret, %exiting_2 ], [ %iv.wide.is_not_zero, %exiting_1 ], [ %result, %loop ]
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; CHECK-NEXT: br label %exit
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; CHECK: exit:
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; CHECK-NEXT: %val = phi i1 [ false, %entry ], [ %val.ph, %exit.loopexit ]
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; CHECK-NEXT: ret i1 %val
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;
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entry:
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%length_not_zero = icmp ne i32 %len, 0
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br i1 %length_not_zero, label %weird_loop, label %exit
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weird_loop:
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%weird.iv = phi i32 [ 0, %entry ], [ %weird.iv.next, %weird_loop ]
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%weird.iv.next = add i32 %weird.iv, 1
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%weird.iv.wide = zext i32 %weird.iv to i64
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%weird.cond = call i1 @bar()
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br i1 %weird.cond, label %weird_loop, label %loop
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loop:
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%iv = phi i32 [ %weird.iv, %weird_loop ], [ %iv.next, %latch ]
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%iv.wide = phi i64 [ %weird.iv.wide, %weird_loop ], [ %iv.wide.next, %latch ]
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%iv.next = add i32 %iv, 1
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%iv.wide.next = add i64 %iv.wide, 1
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%left_ptr = getelementptr inbounds i8, i8* %lhs, i32 %iv
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%right_ptr = getelementptr inbounds i8, i8* %rhs, i32 %iv
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%result = call i1 @foo(i8* %left_ptr, i8* %right_ptr)
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br i1 %result, label %exiting_1, label %exit
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exiting_1:
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%iv.wide.is_not_zero = icmp ne i64 %iv.wide, %weird.iv.wide
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br i1 %iv.wide.is_not_zero, label %exiting_2, label %exit
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exiting_2:
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%bar_ret = call i1 @bar()
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br i1 %bar_ret, label %exit, label %exiting_3
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exiting_3:
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%baz_ret = call i1 @baz()
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br i1 %baz_ret, label %latch, label %exit
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latch:
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%continue = icmp ne i32 %iv.next, %len
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br i1 %continue, label %loop, label %exit
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exit:
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%val = phi i1 [ %result, %loop ], [ %iv.wide.is_not_zero, %exiting_1 ],
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[ %bar_ret, %exiting_2 ], [ %baz_ret, %exiting_3 ],
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[ %baz_ret, %latch ], [ 0, %entry ]
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ret i1 %val
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}
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