[llvm] r294770 - GlobalISel: drop lifetime intrinsics during translation.
Tim Northover via llvm-commits
llvm-commits at lists.llvm.org
Fri Feb 10 11:10:39 PST 2017
Author: tnorthover
Date: Fri Feb 10 13:10:38 2017
New Revision: 294770
URL: http://llvm.org/viewvc/llvm-project?rev=294770&view=rev
Log:
GlobalISel: drop lifetime intrinsics during translation.
We don't use them yet and they just cause problems.
Modified:
llvm/trunk/lib/CodeGen/GlobalISel/IRTranslator.cpp
llvm/trunk/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
Modified: llvm/trunk/lib/CodeGen/GlobalISel/IRTranslator.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/GlobalISel/IRTranslator.cpp?rev=294770&r1=294769&r2=294770&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/GlobalISel/IRTranslator.cpp (original)
+++ llvm/trunk/lib/CodeGen/GlobalISel/IRTranslator.cpp Fri Feb 10 13:10:38 2017
@@ -555,6 +555,14 @@ bool IRTranslator::translateKnownIntrins
switch (ID) {
default:
break;
+ case Intrinsic::lifetime_start:
+ case Intrinsic::lifetime_end:
+ // Stack coloring is not enabled in O0 (which we care about now) so we can
+ // drop these. Make sure someone notices when we start compiling at higher
+ // opts though.
+ if (MF->getTarget().getOptLevel() != CodeGenOpt::None)
+ return false;
+ return true;
case Intrinsic::dbg_declare: {
const DbgDeclareInst &DI = cast<DbgDeclareInst>(CI);
assert(DI.getVariable() && "Missing variable");
Modified: llvm/trunk/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll?rev=294770&r1=294769&r2=294770&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll (original)
+++ llvm/trunk/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll Fri Feb 10 13:10:38 2017
@@ -1144,3 +1144,14 @@ define float @test_pow_intrin(float %l,
%res = call float @llvm.pow.f32(float %l, float %r)
ret float %res
}
+
+declare void @llvm.lifetime.start(i64, i8*)
+declare void @llvm.lifetime.end(i64, i8*)
+define void @test_lifetime_intrin() {
+; CHECK-LABEL: name: test_lifetime_intrin
+; CHECK: RET_ReallyLR
+ %slot = alloca i8, i32 4
+ call void @llvm.lifetime.start(i64 0, i8* %slot)
+ call void @llvm.lifetime.end(i64 0, i8* %slot)
+ ret void
+}
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