maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

[PowerPC] Change CTR clobber estimation for 128-bit floating types 

Reviewed By: shchenz

Differential Revision: https://reviews.llvm.org/D117459
This commit is contained in:
Qiu Chaofan 2022-01-22 23:20:14 +08:00
parent b27e5459d5
commit 8dedf9b58b
2 changed files with 58 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
View File

@ -653,11 +653,17 @@ bool PPCTTIImpl::mightUseCTR(BasicBlock *BB, TargetLibraryInfo *LibInfo,
}
return true;
} else if (isa<BinaryOperator>(J) &&
(J->getType()->getScalarType()->isFP128Ty() ||
} else if ((J->getType()->getScalarType()->isFP128Ty() ||
J->getType()->getScalarType()->isPPC_FP128Ty())) {
// Most operations on f128 or ppc_f128 values become calls.
return true;
} else if (isa<FCmpInst>(J) &&
J->getOperand(0)->getType()->getScalarType()->isFP128Ty()) {
return true;
} else if ((isa<FPTruncInst>(J) || isa<FPExtInst>(J)) &&
(cast<CastInst>(J)->getSrcTy()->getScalarType()->isFP128Ty() ||
cast<CastInst>(J)->getDestTy()->getScalarType()->isFP128Ty())) {
return true;
} else if (isa<UIToFPInst>(J) || isa<SIToFPInst>(J) ||
isa<FPToUIInst>(J) || isa<FPToSIInst>(J)) {
CastInst *CI = cast<CastInst>(J);

52
llvm/test/CodeGen/PowerPC/ctrloop-fp128.ll
View File

@ -1,5 +1,7 @@
; RUN: llc -verify-machineinstrs -stop-after=hardware-loops -mcpu=pwr9 \
; RUN: -mtriple=powerpc64le-unknown-unknown < %s | FileCheck %s
; RUN: llc < %s -verify-machineinstrs -stop-after=hardware-loops -mcpu=pwr9 \
; RUN: -mtriple=powerpc64le-unknown-unknown | FileCheck %s
; RUN: llc < %s -verify-machineinstrs -stop-after=hardware-loops -mcpu=pwr8 \
; RUN: -mtriple=powerpc64le-unknown-unknown | FileCheck %s
@a = internal global fp128 0xL00000000000000000000000000000000, align 16
@x = internal global [4 x fp128] zeroinitializer, align 16
@ -29,4 +31,50 @@ for.end: ; preds = %for.body
; CHECK-NOT: call i1 @llvm.loop.decrement.i64(i64 1)
}
define void @fpext_ctrloop_fp128(double* %a) {
entry:
br label %for.body
for.body:
%i.06 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
%arrayidx = getelementptr inbounds double, double* %a, i64 %i.06
%0 = load double, double* %arrayidx, align 8
%ext = fpext double %0 to fp128
%arrayidx1 = getelementptr inbounds [4 x fp128], [4 x fp128]* @y, i64 0, i64 %i.06
store fp128 %ext, fp128* %arrayidx1, align 16
%inc = add nuw nsw i64 %i.06, 1
%exitcond = icmp eq i64 %inc, 4
br i1 %exitcond, label %for.end, label %for.body
for.end:
ret void
; CHECK-LABEL: fpext_ctrloop_fp128
; CHECK-NOT: call void @llvm.set.loop.iterations.i64(i64 4)
; CHECK-NOT: call i1 @llvm.loop.decrement.i64(i64 1)
}
define void @fptrunc_ctrloop_fp128(double* %a) {
entry:
br label %for.body
for.body:
%i.06 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
%arrayidx = getelementptr inbounds [4 x fp128], [4 x fp128]* @x, i64 0, i64 %i.06
%0 = load fp128, fp128* %arrayidx, align 16
%trunc = fptrunc fp128 %0 to double
%arrayidx1 = getelementptr inbounds double, double* %a, i64 %i.06
store double %trunc, double* %arrayidx1, align 16
%inc = add nuw nsw i64 %i.06, 1
%exitcond = icmp eq i64 %inc, 4
br i1 %exitcond, label %for.end, label %for.body
for.end:
ret void
; CHECK-LABEL: fptrunc_ctrloop_fp128
; CHECK-NOT: call void @llvm.set.loop.iterations.i64(i64 4)
; CHECK-NOT: call i1 @llvm.loop.decrement.i64(i64 1)
}
declare void @obfuscate(i8*, ...) local_unnamed_addr #2