From 556b20ab46520ac53bb689d3c70160bc9d496a3f Mon Sep 17 00:00:00 2001 From: Devang Patel Date: Wed, 4 Feb 2009 01:06:11 +0000 Subject: [PATCH] While folding vallue comparison terminators ignore dbg intrinsics. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63700 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/Utils/SimplifyCFG.cpp | 3 ++ .../SimplifyCFG/switch_formation.dbg.ll | 49 +++++++++++++++++++ 2 files changed, 52 insertions(+) create mode 100644 test/Transforms/SimplifyCFG/switch_formation.dbg.ll diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp index ea68abe22d9..25070aa42d6 100644 --- a/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/lib/Transforms/Utils/SimplifyCFG.cpp @@ -1882,7 +1882,10 @@ bool llvm::SimplifyCFG(BasicBlock *BB) { return SimplifyCFG(BB) || 1; // This block must be empty, except for the setcond inst, if it exists. + // Ignore dbg intrinsics. BasicBlock::iterator I = BB->begin(); + while (isa(I)) + I++; if (&*I == BI || (&*I == cast(BI->getCondition()) && &*++I == BI)) diff --git a/test/Transforms/SimplifyCFG/switch_formation.dbg.ll b/test/Transforms/SimplifyCFG/switch_formation.dbg.ll new file mode 100644 index 00000000000..0ce01f1cfae --- /dev/null +++ b/test/Transforms/SimplifyCFG/switch_formation.dbg.ll @@ -0,0 +1,49 @@ +; RUN: llvm-as < %s | opt -simplifycfg | llvm-dis | not grep br +; END. + + + %llvm.dbg.anchor.type = type { i32, i32 } + %llvm.dbg.compile_unit.type = type { i32, { }*, i32, i8*, i8*, i8*, i1, i1, i8* } + +@llvm.dbg.compile_units = linkonce constant %llvm.dbg.anchor.type { i32 458752, i32 17 }, section "llvm.metadata" ; + +@.str = internal constant [4 x i8] c"a.c\00", section "llvm.metadata" ; <[4 x i8]*> [#uses=1] +@.str1 = internal constant [6 x i8] c"/tmp/\00", section "llvm.metadata" ; <[6 x i8]*> [#uses=1] +@.str2 = internal constant [55 x i8] c"4.2.1 (Based on Apple Inc. build 5636) (LLVM build 00)\00", section "llvm.metadata" ; <[55 x i8]*> [#uses=1] +@llvm.dbg.compile_unit = internal constant %llvm.dbg.compile_unit.type { i32 458769, { }* bitcast (%llvm.dbg.anchor.type* @llvm.dbg.compile_units to { }*), i32 1, i8* getelementptr ([4 x i8]* @.str, i32 0, i32 0), i8* getelementptr ([6 x i8]* @.str1, i32 0, i32 0), i8* getelementptr ([55 x i8]* @.str2, i32 0, i32 0), i1 true, i1 false, i8* null }, section "llvm.metadata" ; <%llvm.dbg.compile_unit.type*> [#uses=1] + +declare void @llvm.dbg.stoppoint(i32, i32, { }*) nounwind + +define i1 @_ZN4llvm11SetCondInst7classofEPKNS_11InstructionE({ i32, i32 }* %I) { +entry: + %tmp.1.i = getelementptr { i32, i32 }* %I, i64 0, i32 1 ; [#uses=1] + %tmp.2.i = load i32* %tmp.1.i ; [#uses=6] + %tmp.2 = icmp eq i32 %tmp.2.i, 14 ; [#uses=1] + br i1 %tmp.2, label %shortcirc_done.4, label %shortcirc_next.0 +shortcirc_next.0: ; preds = %entry +call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) + %tmp.6 = icmp eq i32 %tmp.2.i, 15 ; [#uses=1] + br i1 %tmp.6, label %shortcirc_done.4, label %shortcirc_next.1 +shortcirc_next.1: ; preds = %shortcirc_next.0 +call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) + %tmp.11 = icmp eq i32 %tmp.2.i, 16 ; [#uses=1] + br i1 %tmp.11, label %shortcirc_done.4, label %shortcirc_next.2 +shortcirc_next.2: ; preds = %shortcirc_next.1 +call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) + %tmp.16 = icmp eq i32 %tmp.2.i, 17 ; [#uses=1] + br i1 %tmp.16, label %shortcirc_done.4, label %shortcirc_next.3 +shortcirc_next.3: ; preds = %shortcirc_next.2 +call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) + %tmp.21 = icmp eq i32 %tmp.2.i, 18 ; [#uses=1] + br i1 %tmp.21, label %shortcirc_done.4, label %shortcirc_next.4 +shortcirc_next.4: ; preds = %shortcirc_next.3 +call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) + %tmp.26 = icmp eq i32 %tmp.2.i, 19 ; [#uses=1] + br label %UnifiedReturnBlock +shortcirc_done.4: ; preds = %shortcirc_next.3, %shortcirc_next.2, %shortcirc_next.1, %shortcirc_next.0, %entry + br label %UnifiedReturnBlock +UnifiedReturnBlock: ; preds = %shortcirc_done.4, %shortcirc_next.4 + %UnifiedRetVal = phi i1 [ %tmp.26, %shortcirc_next.4 ], [ true, %shortcirc_done.4 ] ; [#uses=1] + ret i1 %UnifiedRetVal +} + -- 2.34.1