From da65822cfc938594f8fb7840947c1eb77e057a48 Mon Sep 17 00:00:00 2001 From: Dan Gohman Date: Tue, 18 Aug 2009 15:18:18 +0000 Subject: Make tail merging handle blocks with repeated predecessors correctly, and remove RemoveDuplicateSuccessor, as it is no longer necessary, and because it breaks assumptions made in MachineBasicBlock::isOnlyReachableByFallthrough. Convert test/CodeGen/X86/omit-label.ll to FileCheck and add a testcase for PR4732. test/CodeGen/Thumb2/thumb2-ifcvt2.ll sees a diff with this commit due to it being bugpoint-reduced to the point where it doesn't matter what the condition for the branch is. Add some more interesting code to test/CodeGen/X86/2009-08-06-branchfolder-crash.ll, which is the testcase that originally motivated the RemoveDuplicateSuccessor code, to help verify that the original problem isn't being re-broken. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79338 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/CodeGen/X86/omit-label.ll | 38 ++++++++++++++++++++++++++++++++++++-- 1 file changed, 36 insertions(+), 2 deletions(-) (limited to 'test/CodeGen/X86/omit-label.ll') diff --git a/test/CodeGen/X86/omit-label.ll b/test/CodeGen/X86/omit-label.ll index 457b66b..6450f95 100644 --- a/test/CodeGen/X86/omit-label.ll +++ b/test/CodeGen/X86/omit-label.ll @@ -1,7 +1,11 @@ -; RUN: llvm-as < %s | llc -march=x86-64 | grep BB1_1: +; RUN: llvm-as < %s | llc -march=x86-64 -asm-verbose=false | FileCheck %s ; PR4126 +; PR4732 -; Don't omit this label's definition. +; Don't omit these labels' definitions. + +; CHECK: bux: +; CHECK: .LBB1_1: define void @bux(i32 %p_53) nounwind optsize { entry: @@ -21,3 +25,33 @@ bb3: ; preds = %bb.i, %entry } declare i32 @baz(...) + +; Don't omit this label in the assembly output. +; CHECK: int321: +; CHECK: jne .LBB2_1 +; CHECK: jle .LBB2_1 +; CHECK: .LBB2_1: + +define void @int321(i8 signext %p_103, i32 %uint8p_104) nounwind readnone { +entry: + %tobool = icmp eq i8 %p_103, 0 ; [#uses=1] + %cmp.i = icmp sgt i8 %p_103, 0 ; [#uses=1] + %or.cond = and i1 %tobool, %cmp.i ; [#uses=1] + br i1 %or.cond, label %land.end.i, label %for.cond.preheader + +land.end.i: ; preds = %entry + %conv3.i = sext i8 %p_103 to i32 ; [#uses=1] + %div.i = sdiv i32 1, %conv3.i ; [#uses=1] + %tobool.i = icmp eq i32 %div.i, -2147483647 ; [#uses=0] + br label %for.cond.preheader + +for.cond.preheader: ; preds = %land.end.i, %entry + %cmp = icmp sgt i8 %p_103, 1 ; [#uses=1] + br i1 %cmp, label %for.end.split, label %for.cond + +for.cond: ; preds = %for.cond.preheader, %for.cond + br label %for.cond + +for.end.split: ; preds = %for.cond.preheader + ret void +} -- cgit v1.1