d2d9dc8eb4
Debugify is extremely useful as a testing and debugging tool, and a good number of LLVM-IR transform tests use it. We need it to support "new" non-instruction debug-info to get test coverage, but it's not important enough to completely convert right now (and it'd be a large undertaking). Thus: convert to/from dbg.value/DPValue mode on entry and exit of the pass, which gives us the functionality without any further work. The cost is compile-time, but again this is only happening during tests. Tested by: the large set of debugify tests enabled here. Note the InstCombine test (cast-mul-select.ll) that hasn't been fully enabled: this is because there's a debug-info sinking piece of code there that hasn't been instrumented.
40 lines
1.6 KiB
LLVM
40 lines
1.6 KiB
LLVM
; RUN: opt < %s -passes=loop-vectorize -S 2>&1 | FileCheck %s
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; RUN: opt < %s -passes=debugify,loop-vectorize -S | FileCheck %s -check-prefix DEBUGLOC
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; RUN: opt < %s -passes=debugify,loop-vectorize -S --try-experimental-debuginfo-iterators | FileCheck %s -check-prefix DEBUGLOC
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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; This test makes sure we don't duplicate the loop vectorizer's metadata
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; while marking them as already vectorized (by setting width = 1), even
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; at lower optimization levels, where no extra cleanup is done
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; DEBUGLOC-LABEL: define void @_Z3fooPf(
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; Check that the phi to resume the scalar part of the loop
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; has Debug Location.
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define void @_Z3fooPf(ptr %a) {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds float, ptr %a, i64 %indvars.iv
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%p = load float, ptr %arrayidx, align 4
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%mul = fmul float %p, 2.000000e+00
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store float %mul, ptr %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 1024
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !0
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; DEBUGLOC: scalar.ph:
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; DEBUGLOC-NEXT: %bc.resume.val = phi {{.*}} !dbg ![[DbgLoc:[0-9]+]]
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;
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; DEBUGLOC: ![[DbgLoc]] = !DILocation(line: 2
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for.end: ; preds = %for.body
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ret void
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}
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!0 = !{!0, !1}
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!1 = !{!"llvm.loop.vectorize.width", i32 4}
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; CHECK-NOT: !{metadata !"llvm.loop.vectorize.width", i32 4}
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; CHECK: !{!"llvm.loop.isvectorized", i32 1}
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