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3a27395ee7
There are two nontrivial details here: * Loop structure update interface is quite different with new pass manager, so the code to add new loops was factored out * BranchProbabilityInfo is not a loop analysis, so it can not be just getResult'ed from within the loop pass. It cant even be queried through getCachedResult as LoopCanonicalization sequence (e.g. LoopSimplify) might invalidate BPI results. Complete solution for BPI will likely take some time to discuss and figure out, so for now this was partially solved by making BPI optional in IRCE (skipping a couple of profitability checks if it is absent). Most of the IRCE tests got their corresponding new-pass-manager variant enabled. Only two of them depend on BPI, both marked with TODO, to be turned on when BPI starts being available for loop passes. Reviewers: chandlerc, mkazantsev, sanjoy, asbirlea Reviewed By: mkazantsev Differential Revision: https://reviews.llvm.org/D43795 llvm-svn: 327619
119 lines
4.7 KiB
LLVM
119 lines
4.7 KiB
LLVM
; 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>,loop(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, !range !0
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; CHECH-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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