3958719dda
The reordering can leave at least a dead TokenFactor in the graph. This cause the linearize scheduler to fail with something like the assert seen in PR22614. This is only one of many ways we can break the linearize scheduler today so I can't say for sure that any of the other failures in that bug were caused by this issue. This takes the heavy hammer approach of just running RemoveDeadNodes unconditionally at the end of the PreprocessISelDAG. If this turns out to be a compile time hit, we can try to refine it. Differential Revision: https://reviews.llvm.org/D61164 llvm-svn: 359582
48 lines
2.8 KiB
LLVM
48 lines
2.8 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-apple-darwin | grep call | grep 560
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; rdar://6522427
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; This command line used to crash due to dangling nodes left after PreprocessISelDAG
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; RUN: llc < %s -mtriple=x86_64-apple-darwin -pre-RA-sched=linearize
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%"struct.clang::Action" = type { %"struct.clang::ActionBase" }
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%"struct.clang::ActionBase" = type { i32 (...)** }
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%"struct.clang::ActionBase::ActionResult<0u>" = type { i8*, i8 }
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@NumTrials = internal global i32 10000000 ; <i32*> [#uses=2]
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@llvm.used = appending global [1 x i8*] [ i8* bitcast (void (i8*, %"struct.clang::Action"*)* @_Z25RawPointerPerformanceTestPvRN5clang6ActionE to i8*) ], section "llvm.metadata" ; <[1 x i8*]*> [#uses=0]
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define void @_Z25RawPointerPerformanceTestPvRN5clang6ActionE(i8* %Val, %"struct.clang::Action"* %Actions) nounwind {
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entry:
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%0 = alloca %"struct.clang::ActionBase::ActionResult<0u>", align 8 ; <%"struct.clang::ActionBase::ActionResult<0u>"*> [#uses=3]
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%1 = load i32, i32* @NumTrials, align 4 ; <i32> [#uses=1]
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%2 = icmp eq i32 %1, 0 ; <i1> [#uses=1]
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br i1 %2, label %return, label %bb.nph
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bb.nph: ; preds = %entry
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%3 = getelementptr %"struct.clang::Action", %"struct.clang::Action"* %Actions, i64 0, i32 0, i32 0 ; <i32 (...)***> [#uses=1]
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%mrv_gep = bitcast %"struct.clang::ActionBase::ActionResult<0u>"* %0 to i64* ; <i64*> [#uses=1]
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%mrv_gep1 = getelementptr %"struct.clang::ActionBase::ActionResult<0u>", %"struct.clang::ActionBase::ActionResult<0u>"* %0, i64 0, i32 1 ; <i8*> [#uses=1]
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%4 = bitcast i8* %mrv_gep1 to i64* ; <i64*> [#uses=1]
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%5 = getelementptr %"struct.clang::ActionBase::ActionResult<0u>", %"struct.clang::ActionBase::ActionResult<0u>"* %0, i64 0, i32 0 ; <i8**> [#uses=1]
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br label %bb
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bb: ; preds = %bb, %bb.nph
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%Trial.01 = phi i32 [ 0, %bb.nph ], [ %12, %bb ] ; <i32> [#uses=1]
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%Val_addr.02 = phi i8* [ %Val, %bb.nph ], [ %11, %bb ] ; <i8*> [#uses=1]
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%6 = load i32 (...)**, i32 (...)*** %3, align 8 ; <i32 (...)**> [#uses=1]
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%7 = getelementptr i32 (...)*, i32 (...)** %6, i64 70 ; <i32 (...)**> [#uses=1]
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%8 = load i32 (...)*, i32 (...)** %7, align 8 ; <i32 (...)*> [#uses=1]
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%9 = bitcast i32 (...)* %8 to { i64, i64 } (%"struct.clang::Action"*, i8*)* ; <{ i64, i64 } (%"struct.clang::Action"*, i8*)*> [#uses=1]
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%10 = call { i64, i64 } %9(%"struct.clang::Action"* %Actions, i8* %Val_addr.02) nounwind ; <{ i64, i64 }> [#uses=2]
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%mrv_gr = extractvalue { i64, i64 } %10, 0 ; <i64> [#uses=1]
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store i64 %mrv_gr, i64* %mrv_gep
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%mrv_gr2 = extractvalue { i64, i64 } %10, 1 ; <i64> [#uses=1]
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store i64 %mrv_gr2, i64* %4
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%11 = load i8*, i8** %5, align 8 ; <i8*> [#uses=1]
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%12 = add i32 %Trial.01, 1 ; <i32> [#uses=2]
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%13 = load i32, i32* @NumTrials, align 4 ; <i32> [#uses=1]
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%14 = icmp ult i32 %12, %13 ; <i1> [#uses=1]
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br i1 %14, label %bb, label %return
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return: ; preds = %bb, %entry
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ret void
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}
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