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Handle cases where there aren't uses in the barrier mbb.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58174 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2008-10-25 23:49:39 +00:00
parent 95a3f0d99e
commit 79d5b5acae
2 changed files with 61 additions and 1 deletions
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6
lib/CodeGen/PreAllocSplitting.cpp
View File

@ -457,8 +457,12 @@ PreAllocSplitting::ShrinkWrapLiveInterval(VNInfo *ValNo,
DefMI->eraseFromParent();
CurrLI->removeRange(ValNo->def, LIs->getMBBEndIdx(MBB)+1);
}
} else if (MBB == BarrierMBB) {
// Remove entire live range from start of mbb to barrier.
CurrLI->removeRange(LIs->getMBBStartIdx(MBB),
LIs->getUseIndex(BarrierIdx)+1);
} else {
// Remove entire live range of the bb out of the live interval.
// Remove entire live range of the mbb out of the live interval.
CurrLI->removeRange(LIs->getMBBStartIdx(MBB), LIs->getMBBEndIdx(MBB)+1);
}

56
test/CodeGen/X86/pre-split5.ll Normal file
View File

@ -0,0 +1,56 @@
; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 -pre-alloc-split
target triple = "i386-apple-darwin9.5"
%struct.FILE = type { i8*, i32, i32, i16, i16, %struct.__sbuf, i32, i8*, i32 (i8*)*, i32 (i8*, i8*, i32)*, i64 (i8*, i64, i32)*, i32 (i8*, i8*, i32)*, %struct.__sbuf, %struct.__sFILEX*, i32, [3 x i8], [1 x i8], %struct.__sbuf, i32, i64 }
%struct.__sFILEX = type opaque
%struct.__sbuf = type { i8*, i32 }
@"\01LC1" = external constant [48 x i8] ; <[48 x i8]*> [#uses=1]
define i32 @main() nounwind {
entry:
br label %bb5.us
bb5.us: ; preds = %bb8.split, %bb5.us, %entry
%i.0.reg2mem.0.ph = phi i32 [ 0, %entry ], [ %indvar.next53, %bb8.split ], [ %i.0.reg2mem.0.ph, %bb5.us ] ; <i32> [#uses=2]
%j.0.reg2mem.0.us = phi i32 [ %indvar.next47, %bb5.us ], [ 0, %bb8.split ], [ 0, %entry ] ; <i32> [#uses=1]
%indvar.next47 = add i32 %j.0.reg2mem.0.us, 1 ; <i32> [#uses=2]
%exitcond48 = icmp eq i32 %indvar.next47, 256 ; <i1> [#uses=1]
br i1 %exitcond48, label %bb8.split, label %bb5.us
bb8.split: ; preds = %bb5.us
%indvar.next53 = add i32 %i.0.reg2mem.0.ph, 1 ; <i32> [#uses=2]
%exitcond54 = icmp eq i32 %indvar.next53, 256 ; <i1> [#uses=1]
br i1 %exitcond54, label %bb11, label %bb5.us
bb11: ; preds = %bb11, %bb8.split
%i.1.reg2mem.0 = phi i32 [ %indvar.next44, %bb11 ], [ 0, %bb8.split ] ; <i32> [#uses=1]
%indvar.next44 = add i32 %i.1.reg2mem.0, 1 ; <i32> [#uses=2]
%exitcond45 = icmp eq i32 %indvar.next44, 63 ; <i1> [#uses=1]
br i1 %exitcond45, label %bb14, label %bb11
bb14: ; preds = %bb14, %bb11
%indvar = phi i32 [ %indvar.next40, %bb14 ], [ 0, %bb11 ] ; <i32> [#uses=1]
%indvar.next40 = add i32 %indvar, 1 ; <i32> [#uses=2]
%exitcond41 = icmp eq i32 %indvar.next40, 32768 ; <i1> [#uses=1]
br i1 %exitcond41, label %bb28, label %bb14
bb28: ; preds = %bb14
%0 = fdiv double 2.550000e+02, 0.000000e+00 ; <double> [#uses=1]
br label %bb30
bb30: ; preds = %bb36, %bb28
%m.1.reg2mem.0 = phi i32 [ %m.0, %bb36 ], [ 0, %bb28 ] ; <i32> [#uses=1]
%1 = mul double 0.000000e+00, %0 ; <double> [#uses=1]
%2 = fptosi double %1 to i32 ; <i32> [#uses=1]
br i1 false, label %bb36, label %bb35
bb35: ; preds = %bb30
%3 = tail call i32 (%struct.FILE*, i8*, ...)* @fprintf(%struct.FILE* null, i8* getelementptr ([48 x i8]* @"\01LC1", i32 0, i32 0), i32 0, i32 0, i32 0, i32 %2) nounwind ; <i32> [#uses=0]
br label %bb36
bb36: ; preds = %bb35, %bb30
%m.0 = phi i32 [ 0, %bb35 ], [ %m.1.reg2mem.0, %bb30 ] ; <i32> [#uses=1]
br label %bb30
}
declare i32 @fprintf(%struct.FILE*, i8*, ...) nounwind