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Fix PR3457: Ignore control successors when looking for closest scheduled successor. A control successor doesn't read result(s) produced by the scheduling unit being evaluated.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64210 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -30,7 +30,6 @@
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#include "llvm/ADT/Statistic.h"
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#include "llvm/ADT/STLExtras.h"
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#include <climits>
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#include "llvm/Support/CommandLine.h"
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using namespace llvm;
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STATISTIC(NumBacktracks, "Number of times scheduler backtracked");
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@ -1047,6 +1046,7 @@ static unsigned closestSucc(const SUnit *SU) {
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unsigned MaxHeight = 0;
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for (SUnit::const_succ_iterator I = SU->Succs.begin(), E = SU->Succs.end();
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I != E; ++I) {
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if (I->isCtrl()) continue; // ignore chain succs
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unsigned Height = I->getSUnit()->getHeight();
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// If there are bunch of CopyToRegs stacked up, they should be considered
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// to be at the same position.
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@ -1,6 +1,9 @@
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; RUN: llvm-as < %s | llc -mtriple=arm-apple-darwin | grep ldmia
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; RUN: llvm-as < %s | llc -mtriple=arm-apple-darwin | grep ldrb
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; RUN: llvm-as < %s | llc -mtriple=arm-apple-darwin | grep ldrh
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; This used to look for ldmia. But it's no longer lucky enough to
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; have the load / store instructions lined up just right after
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; scheduler change for pr3457. We'll look for a robust solution
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; later.
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%struct.x = type { i8, i8, i8, i8, i8, i8, i8, i8, i8, i8, i8 }
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@src = external global %struct.x
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@ -1,8 +1,10 @@
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; RUN: llvm-as < %s | llc -mtriple=i386-apple-darwin | grep pcmpeqd | count 1
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; RUN: llvm-as < %s | llc -mtriple=i386-apple-darwin | not grep pcmpeqd
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; RUN: llvm-as < %s | llc -mtriple=i386-apple-darwin | grep orps | grep CPI1_2 | count 2
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; RUN: llvm-as < %s | llc -mtriple=x86_64-apple-darwin | grep pcmpeqd | count 1
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; This testcase shouldn't need to spill the -1 value,
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; so it should just use pcmpeqd to materialize an all-ones vector.
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; For i386, cp load of -1 are folded.
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%struct.__ImageExecInfo = type <{ <4 x i32>, <4 x float>, <2 x i64>, i8*, i8*, i8*, i32, i32, i32, i32, i32 }>
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%struct._cl_image_format_t = type <{ i32, i32, i32 }>
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16
test/CodeGen/X86/pr3457.ll
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16
test/CodeGen/X86/pr3457.ll
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@ -0,0 +1,16 @@
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; RUN: llvm-as < %s | llc -mtriple=i386-apple-darwin | not grep fstpt
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; PR3457
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; rdar://6548010
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define void @foo(double* nocapture %P) nounwind {
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entry:
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%0 = tail call double (...)* @test() nounwind ; <double> [#uses=2]
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%1 = tail call double (...)* @test() nounwind ; <double> [#uses=2]
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%2 = mul double %0, %0 ; <double> [#uses=1]
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%3 = mul double %1, %1 ; <double> [#uses=1]
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%4 = add double %2, %3 ; <double> [#uses=1]
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store double %4, double* %P, align 8
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ret void
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}
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declare double @test(...)
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