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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2013-03-08 18:08:57 +0000 |
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| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2013-03-08 18:08:57 +0000 |
| commit | 778ef97c76af82ef9e312529e6bd9d71d3c040ae (patch) | |
| tree | fdedba8fdea53e53595188adc5bda877f76f7323 /test/CodeGen/X86/misched-crash.ll | |
| parent | e77b6ceb02b07659092b969fb4a96b56c52375ad (diff) | |
| download | llvm-778ef97c76af82ef9e312529e6bd9d71d3c040ae.tar.gz llvm-778ef97c76af82ef9e312529e6bd9d71d3c040ae.tar.bz2 llvm-778ef97c76af82ef9e312529e6bd9d71d3c040ae.tar.xz | |
Rewrite the physreg part of findLastUseBefore().
To find the last use of a register unit, start from the bottom and scan
upwards until a user is found.
<rdar://problem/13353090>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176706 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/misched-crash.ll')
| -rw-r--r-- | test/CodeGen/X86/misched-crash.ll | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/test/CodeGen/X86/misched-crash.ll b/test/CodeGen/X86/misched-crash.ll new file mode 100644 index 0000000000..7644ee0708 --- /dev/null +++ b/test/CodeGen/X86/misched-crash.ll @@ -0,0 +1,40 @@ +; RUN: llc < %s -enable-misched -verify-misched +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" +target triple = "x86_64-apple-macosx10" + +; This function contains a cmp instruction with two users. +; Hoisting the last use requires trimming the EFLAGS live range to the second. +define void @rdar13353090(i8* %plane, i64 %_x1, i64 %_x2) { +entry: + %cmp = icmp ult i64 %_x1, %_x2 + %cond = select i1 %cmp, i64 %_x1, i64 %_x2 + %cond10 = select i1 %cmp, i64 %_x2, i64 %_x1 + %0 = load i64* null, align 8 + %cmp16 = icmp ult i64 %cond, %0 + %cmp23 = icmp ugt i64 %cond10, 0 + br i1 %cmp16, label %land.lhs.true21, label %return + +land.lhs.true21: ; preds = %entry + %sub = add i64 %0, -1 + br i1 %cmp23, label %if.then24, label %return + +if.then24: ; preds = %land.lhs.true21 + %cmp16.i = icmp ult i64 %cond, %sub + %cond20.i = select i1 %cmp16.i, i64 %cond, i64 %sub + %add21.i = add i64 0, %cond20.i + br label %for.body34.i + +for.body34.i: ; preds = %for.inc39.i, %if.then24 + %index.178.i = phi i64 [ %add21.i, %if.then24 ], [ %inc41.i, %for.inc39.i ] + %arrayidx35.i = getelementptr inbounds i8* %plane, i64 %index.178.i + %1 = load i8* %arrayidx35.i, align 1 + %tobool36.i = icmp eq i8 %1, 0 + br i1 %tobool36.i, label %for.inc39.i, label %return + +for.inc39.i: ; preds = %for.body34.i + %inc41.i = add i64 %index.178.i, 1 + br i1 undef, label %return, label %for.body34.i + +return: ; preds = %for.inc39.i, %for.body34.i, %land.lhs.true21, %entry + ret void +} |