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author | Michael Zolotukhin <mzolotukhin@apple.com> | 2014-04-30 19:17:32 +0000 |
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committer | Michael Zolotukhin <mzolotukhin@apple.com> | 2014-04-30 19:17:32 +0000 |
commit | c80b103a2b1659482332b41c42f49137f3a5c069 (patch) | |
tree | c079a356779ab5deb88238fb2baacd5db7c69c0c /test | |
parent | 4aef7270c975ed62788ce5956a1763101113bc6f (diff) | |
download | llvm-c80b103a2b1659482332b41c42f49137f3a5c069.tar.gz llvm-c80b103a2b1659482332b41c42f49137f3a5c069.tar.bz2 llvm-c80b103a2b1659482332b41c42f49137f3a5c069.tar.xz |
[X86] Never hoist the shift value of a shift instruction.
There is no need to check if we want to hoist the immediate value of an
shift instruction. Simply return TCC_Free right away.
This change is like r206101, but for X86.
rdar://problem/16190769
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207692 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
-rw-r--r-- | test/CodeGen/X86/remat-invalid-liveness.ll | 10 | ||||
-rw-r--r-- | test/Transforms/ConstantHoisting/X86/large-immediate.ll | 18 |
2 files changed, 24 insertions, 4 deletions
diff --git a/test/CodeGen/X86/remat-invalid-liveness.ll b/test/CodeGen/X86/remat-invalid-liveness.ll index b14afe96ef..d285e83b79 100644 --- a/test/CodeGen/X86/remat-invalid-liveness.ll +++ b/test/CodeGen/X86/remat-invalid-liveness.ll @@ -31,6 +31,8 @@ target triple = "i386-apple-macosx10.9" ; Function Attrs: nounwind optsize ssp define fastcc void @__XXX1(%struct.A* %ht) #0 { entry: + %const72 = bitcast i128 72 to i128 + %const3 = bitcast i128 3 to i128 switch i32 undef, label %if.end196 [ i32 1, label %sw.bb.i i32 3, label %sw.bb2.i @@ -39,13 +41,13 @@ entry: sw.bb.i: ; preds = %entry %call.i.i.i = tail call i32 undef(%struct.A* %ht, i8 zeroext 22, i32 undef, i32 0, %struct.D* undef) %bf.load.i.i = load i128* undef, align 4 - %bf.lshr.i.i = lshr i128 %bf.load.i.i, 72 + %bf.lshr.i.i = lshr i128 %bf.load.i.i, %const72 %shl1.i.i = shl nuw nsw i128 %bf.lshr.i.i, 8 %shl.i.i = trunc i128 %shl1.i.i to i32 br i1 undef, label %cond.false10.i.i, label %__XXX2.exit.i.i __XXX2.exit.i.i: ; preds = %sw.bb.i - %extract11.i.i.i = lshr i128 %bf.load.i.i, 3 + %extract11.i.i.i = lshr i128 %bf.load.i.i, %const3 %extract.t12.i.i.i = trunc i128 %extract11.i.i.i to i32 %bf.cast7.i.i.i = and i32 %extract.t12.i.i.i, 3 %arrayidx.i.i.i = getelementptr inbounds %struct.A* %ht, i32 0, i32 3, i32 %bf.cast7.i.i.i @@ -69,11 +71,11 @@ for.body.i.i: ; preds = %for.body.i.i, %cond br i1 %or.cond, label %for.body.i.i, label %if.end196 sw.bb2.i: ; preds = %entry - %bf.lshr.i85.i = lshr i128 undef, 72 + %bf.lshr.i85.i = lshr i128 undef, %const72 br i1 undef, label %if.end196, label %__XXX2.exit.i95.i __XXX2.exit.i95.i: ; preds = %sw.bb2.i - %extract11.i.i91.i = lshr i128 undef, 3 + %extract11.i.i91.i = lshr i128 undef, %const3 br label %if.end196 if.end196: ; preds = %__XXX2.exit.i95.i, %sw.bb2.i, %for.body.i.i, %cond.end12.i.i, %entry diff --git a/test/Transforms/ConstantHoisting/X86/large-immediate.ll b/test/Transforms/ConstantHoisting/X86/large-immediate.ll new file mode 100644 index 0000000000..bd7fa40e9c --- /dev/null +++ b/test/Transforms/ConstantHoisting/X86/large-immediate.ll @@ -0,0 +1,18 @@ +; RUN: opt -mtriple=x86_64-darwin-unknown -S -consthoist < %s | FileCheck %s + +define i128 @test1(i128 %a) nounwind { +; CHECK-LABEL: test1 +; CHECK: %const = bitcast i128 12297829382473034410122878 to i128 + %1 = add i128 %a, 12297829382473034410122878 + %2 = add i128 %1, 12297829382473034410122878 + ret i128 %2 +} + +; Check that we don't hoist the shift value of a shift instruction. +define i512 @test2(i512 %a) nounwind { +; CHECK-LABEL: test2 +; CHECK-NOT: %const = bitcast i512 504 to i512 + %1 = shl i512 %a, 504 + %2 = ashr i512 %1, 504 + ret i512 %2 +} |