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.
30 lines
1.1 KiB
LLVM
30 lines
1.1 KiB
LLVM
; RUN: opt < %s -passes=lcssa -S | FileCheck %s
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; RUN: opt < %s -passes=debugify,lcssa -S | FileCheck -check-prefix=DEBUGIFY %s
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; RUN: opt < %s -passes=debugify,lcssa -S --try-experimental-debuginfo-iterators | FileCheck -check-prefix=DEBUGIFY %s
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define void @lcssa(i1 %S2) {
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; CHECK-LABEL: @lcssa
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entry:
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br label %loop.interior
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loop.interior: ; preds = %post.if, %entry
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br i1 %S2, label %if.true, label %if.false
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if.true: ; preds = %loop.interior
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%X1 = add i32 0, 0 ; <i32> [#uses=1]
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br label %post.if
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if.false: ; preds = %loop.interior
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%X2 = add i32 0, 1 ; <i32> [#uses=1]
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br label %post.if
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post.if: ; preds = %if.false, %if.true
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%X3 = phi i32 [ %X1, %if.true ], [ %X2, %if.false ] ; <i32> [#uses=1]
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br i1 %S2, label %loop.exit, label %loop.interior
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loop.exit: ; preds = %post.if
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; CHECK: %X3.lcssa = phi i32
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; DEBUGIFY: %X3.lcssa = phi i32 {{.*}}, !dbg ![[DbgLoc:[0-9]+]]
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; CHECK: %X4 = add i32 3, %X3.lcssa
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%X4 = add i32 3, %X3 ; <i32> [#uses=0]
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ret void
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}
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; Make sure the lcssa phi has %X3's debug location
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; DEBUGIFY: ![[DbgLoc]] = !DILocation(line: 7
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