119 lines
4.8 KiB
LLVM
119 lines
4.8 KiB
LLVM
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; RUN: opt -verify-loop-info -irce-print-changed-loops -irce -S < %s 2>&1 | FileCheck %s
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; RUN: opt -verify-loop-info -irce-print-changed-loops -passes='require<branch-prob>,irce' -S < %s 2>&1 | FileCheck %s
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; CHECK: irce: in function test_01: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting>
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; CHECK: irce: in function test_02: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting>
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; Iterate from 0 to SINT_MAX, check that the post-loop is generated.
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define void @test_01(i32* %arr, i32* %a_len_ptr) {
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; CHECK: test_01(
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; CHECK: entry:
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; CHECK-NEXT: %exit.mainloop.at = load i32, i32* %a_len_ptr
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; CHECK: loop:
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; CHECK-NEXT: %idx = phi i32 [ %idx.next, %in.bounds ], [ 0, %loop.preheader ]
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; CHECK-NEXT: %idx.next = add i32 %idx, 1
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; CHECK-NEXT: %abc = icmp slt i32 %idx, %exit.mainloop.at
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; CHECK-NEXT: br i1 true, label %in.bounds,
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; CHECK: in.bounds:
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; CHECK-NEXT: %addr = getelementptr i32, i32* %arr, i32 %idx
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; CHECK-NEXT: store i32 0, i32* %addr
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; CHECK-NEXT: %next = icmp slt i32 %idx.next, 2147483647
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; CHECK-NEXT: [[COND:%[^ ]+]] = icmp slt i32 %idx.next, %exit.mainloop.at
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; CHECK-NEXT: br i1 [[COND]], label %loop, label %main.exit.selector
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; CHECK: main.pseudo.exit:
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; CHECK-NEXT: %idx.copy = phi i32 [ 0, %entry ], [ %idx.next.lcssa, %main.exit.selector ]
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; CHECK-NEXT: %indvar.end = phi i32 [ 0, %entry ], [ %idx.next.lcssa, %main.exit.selector ]
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; CHECK-NEXT: br label %postloop
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; CHECK: postloop:
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; CHECK-NEXT: br label %loop.postloop
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; CHECK: loop.postloop:
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; CHECK-NEXT: %idx.postloop = phi i32 [ %idx.copy, %postloop ], [ %idx.next.postloop, %in.bounds.postloop ]
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; CHECK-NEXT: %idx.next.postloop = add i32 %idx.postloop, 1
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; CHECK-NEXT: %abc.postloop = icmp slt i32 %idx.postloop, %exit.mainloop.at
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; CHECK-NEXT: br i1 %abc.postloop, label %in.bounds.postloop, label %out.of.bounds.loopexit
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; CHECK: in.bounds.postloop:
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; CHECK-NEXT: %addr.postloop = getelementptr i32, i32* %arr, i32 %idx.postloop
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; CHECK-NEXT: store i32 0, i32* %addr.postloop
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; CHECK-NEXT: %next.postloop = icmp slt i32 %idx.next.postloop, 2147483647
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; CHECK-NEXT: br i1 %next.postloop, label %loop.postloop, label %exit.loopexit
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entry:
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%len = load i32, i32* %a_len_ptr, !range !0
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br label %loop
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loop:
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%idx = phi i32 [ 0, %entry ], [ %idx.next, %in.bounds ]
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%idx.next = add i32 %idx, 1
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%abc = icmp slt i32 %idx, %len
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br i1 %abc, label %in.bounds, label %out.of.bounds
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in.bounds:
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%addr = getelementptr i32, i32* %arr, i32 %idx
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store i32 0, i32* %addr
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%next = icmp slt i32 %idx.next, 2147483647
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br i1 %next, label %loop, label %exit
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out.of.bounds:
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ret void
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exit:
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ret void
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}
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; Iterate from SINT_MAX to 0, check that the pre-loop is generated.
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define void @test_02(i32* %arr, i32* %a_len_ptr) {
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; CHECK: test_02(
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; CHECK: entry:
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; CHECK-NEXT: %len = load i32, i32* %a_len_ptr, align 4, !range !0
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; CHECK-NEXT: br i1 true, label %loop.preloop.preheader
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; CHECK: mainloop:
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; CHECK-NEXT: br label %loop
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; CHECK: loop:
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; CHECK-NEXT: %idx = phi i32 [ %idx.preloop.copy, %mainloop ], [ %idx.next, %in.bounds ]
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; CHECK-NEXT: %idx.next = add i32 %idx, -1
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; CHECK-NEXT: %abc = icmp slt i32 %idx, %len
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; CHECK-NEXT: br i1 true, label %in.bounds
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; CHECK: in.bounds:
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; CHECK-NEXT: %addr = getelementptr i32, i32* %arr, i32 %idx
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; CHECK-NEXT: store i32 0, i32* %addr
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; CHECK-NEXT: %next = icmp sgt i32 %idx.next, -1
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; CHECK-NEXT: br i1 %next, label %loop, label %exit.loopexit
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; CHECK: loop.preloop:
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; CHECK-NEXT: %idx.preloop = phi i32 [ %idx.next.preloop, %in.bounds.preloop ], [ 2147483647, %loop.preloop.preheader ]
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; CHECK-NEXT: %idx.next.preloop = add i32 %idx.preloop, -1
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; CHECK-NEXT: %abc.preloop = icmp slt i32 %idx.preloop, %len
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; CHECK-NEXT: br i1 %abc.preloop, label %in.bounds.preloop, label %out.of.bounds.loopexit
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; CHECK: in.bounds.preloop:
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; CHECK-NEXT: %addr.preloop = getelementptr i32, i32* %arr, i32 %idx.preloop
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; CHECK-NEXT: store i32 0, i32* %addr.preloop
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; CHECK-NEXT: %next.preloop = icmp sgt i32 %idx.next.preloop, -1
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; CHECK-NEXT: [[COND:%[^ ]+]] = icmp sgt i32 %idx.next.preloop, -1
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; CHECK-NEXT: br i1 [[COND]], label %loop.preloop, label %preloop.exit.selector
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entry:
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%len = load i32, i32* %a_len_ptr, !range !0
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br label %loop
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loop:
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%idx = phi i32 [ 2147483647, %entry ], [ %idx.next, %in.bounds ]
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%idx.next = add i32 %idx, -1
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%abc = icmp slt i32 %idx, %len
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br i1 %abc, label %in.bounds, label %out.of.bounds
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in.bounds:
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%addr = getelementptr i32, i32* %arr, i32 %idx
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store i32 0, i32* %addr
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%next = icmp sgt i32 %idx.next, -1
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br i1 %next, label %loop, label %exit
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out.of.bounds:
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ret void
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exit:
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ret void
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}
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!0 = !{i32 0, i32 50}
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