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@@ -0,0 +1,395 @@
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+ From 6d15c4deab51498b70825fb6cefbbfe8f3d9bdcf Mon Sep 17 00:00:00 2001
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+ From: serge-sans-paille <sguelton@redhat.com>
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+ Date: Fri, 21 Feb 2020 15:51:19 +0100
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+ Subject: [PATCH] No longer generate calls to *_finite
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+
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+ According to Joseph Myers, a libm maintainer
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+
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+ > They were only ever an ABI (selected by use of -ffinite-math-only or
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+ > options implying it, which resulted in the headers using "asm" to redirect
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+ > calls to some libm functions), not an API. The change means that ABI has
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+ > turned into compat symbols (only available for existing binaries, not for
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+ > anything newly linked, not included in static libm at all, not included in
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+ > shared libm for future glibc ports such as RV32), so, yes, in any case
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+ > where tools generate direct calls to those functions (rather than just
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+ > following the "asm" annotations on function declarations in the headers),
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+ > they need to stop doing so.
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+
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+ As a consequence, we should no longer assume these symbols are available on the
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+ target system.
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+
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+ Still keep the TargetLibraryInfo for constant folding.
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+
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+ Differential Revision: https://reviews.llvm.org/D74712
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+ ---
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+ llvm/lib/Analysis/TargetLibraryInfo.cpp | 3 +
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+ llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 73 +++----------------
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+ .../test/CodeGen/AArch64/illegal-float-ops.ll | 24 +++---
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+ llvm/test/CodeGen/X86/finite-libcalls.ll | 36 ++++-----
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+ 4 files changed, 45 insertions(+), 91 deletions(-)
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+
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+ diff --git a/llvm/lib/Analysis/TargetLibraryInfo.cpp b/llvm/lib/Analysis/TargetLibraryInfo.cpp
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+ index 2c4809b201e..3928fbd3447 100644
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+ --- a/llvm/lib/Analysis/TargetLibraryInfo.cpp
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+ +++ b/llvm/lib/Analysis/TargetLibraryInfo.cpp
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+ @@ -472,6 +472,9 @@ static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
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+ TLI.setUnavailable(LibFunc_tmpfile64);
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+
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+ // Relaxed math functions are included in math-finite.h on Linux (GLIBC).
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+ + // Note that math-finite.h is no longer supported by top-of-tree GLIBC,
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+ + // so we keep these functions around just so that they're recognized by
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+ + // the ConstantFolder.
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+ TLI.setUnavailable(LibFunc_acos_finite);
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+ TLI.setUnavailable(LibFunc_acosf_finite);
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+ TLI.setUnavailable(LibFunc_acosl_finite);
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+ diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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+ index d1afc9a299a..f64d7fd8708 100644
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+ --- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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+ +++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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+ @@ -3941,7 +3941,6 @@ void SelectionDAGLegalize::ConvertNodeToLibcall(SDNode *Node) {
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+ SmallVector<SDValue, 8> Results;
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+ SDLoc dl(Node);
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+ // FIXME: Check flags on the node to see if we can use a finite call.
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+ - bool CanUseFiniteLibCall = TM.Options.NoInfsFPMath && TM.Options.NoNaNsFPMath;
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+ unsigned Opc = Node->getOpcode();
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+ switch (Opc) {
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+ case ISD::ATOMIC_FENCE: {
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+ @@ -4050,68 +4049,28 @@ void SelectionDAGLegalize::ConvertNodeToLibcall(SDNode *Node) {
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+ break;
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+ case ISD::FLOG:
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+ case ISD::STRICT_FLOG:
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+ - if (CanUseFiniteLibCall && DAG.getLibInfo().has(LibFunc_log_finite))
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+ - ExpandFPLibCall(Node, RTLIB::LOG_FINITE_F32,
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+ - RTLIB::LOG_FINITE_F64,
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+ - RTLIB::LOG_FINITE_F80,
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+ - RTLIB::LOG_FINITE_F128,
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+ - RTLIB::LOG_FINITE_PPCF128, Results);
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+ - else
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+ - ExpandFPLibCall(Node, RTLIB::LOG_F32, RTLIB::LOG_F64,
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+ - RTLIB::LOG_F80, RTLIB::LOG_F128,
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+ - RTLIB::LOG_PPCF128, Results);
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+ + ExpandFPLibCall(Node, RTLIB::LOG_F32, RTLIB::LOG_F64, RTLIB::LOG_F80,
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+ + RTLIB::LOG_F128, RTLIB::LOG_PPCF128, Results);
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+ break;
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+ case ISD::FLOG2:
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+ case ISD::STRICT_FLOG2:
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+ - if (CanUseFiniteLibCall && DAG.getLibInfo().has(LibFunc_log2_finite))
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+ - ExpandFPLibCall(Node, RTLIB::LOG2_FINITE_F32,
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+ - RTLIB::LOG2_FINITE_F64,
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+ - RTLIB::LOG2_FINITE_F80,
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+ - RTLIB::LOG2_FINITE_F128,
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+ - RTLIB::LOG2_FINITE_PPCF128, Results);
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+ - else
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+ - ExpandFPLibCall(Node, RTLIB::LOG2_F32, RTLIB::LOG2_F64,
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+ - RTLIB::LOG2_F80, RTLIB::LOG2_F128,
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+ - RTLIB::LOG2_PPCF128, Results);
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+ + ExpandFPLibCall(Node, RTLIB::LOG2_F32, RTLIB::LOG2_F64, RTLIB::LOG2_F80,
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+ + RTLIB::LOG2_F128, RTLIB::LOG2_PPCF128, Results);
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+ break;
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+ case ISD::FLOG10:
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+ case ISD::STRICT_FLOG10:
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+ - if (CanUseFiniteLibCall && DAG.getLibInfo().has(LibFunc_log10_finite))
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+ - ExpandFPLibCall(Node, RTLIB::LOG10_FINITE_F32,
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+ - RTLIB::LOG10_FINITE_F64,
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+ - RTLIB::LOG10_FINITE_F80,
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+ - RTLIB::LOG10_FINITE_F128,
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+ - RTLIB::LOG10_FINITE_PPCF128, Results);
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+ - else
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+ - ExpandFPLibCall(Node, RTLIB::LOG10_F32, RTLIB::LOG10_F64,
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+ - RTLIB::LOG10_F80, RTLIB::LOG10_F128,
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+ - RTLIB::LOG10_PPCF128, Results);
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+ + ExpandFPLibCall(Node, RTLIB::LOG10_F32, RTLIB::LOG10_F64, RTLIB::LOG10_F80,
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+ + RTLIB::LOG10_F128, RTLIB::LOG10_PPCF128, Results);
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+ break;
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+ case ISD::FEXP:
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+ case ISD::STRICT_FEXP:
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+ - if (CanUseFiniteLibCall && DAG.getLibInfo().has(LibFunc_exp_finite))
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+ - ExpandFPLibCall(Node, RTLIB::EXP_FINITE_F32,
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+ - RTLIB::EXP_FINITE_F64,
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+ - RTLIB::EXP_FINITE_F80,
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+ - RTLIB::EXP_FINITE_F128,
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+ - RTLIB::EXP_FINITE_PPCF128, Results);
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+ - else
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+ - ExpandFPLibCall(Node, RTLIB::EXP_F32, RTLIB::EXP_F64,
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+ - RTLIB::EXP_F80, RTLIB::EXP_F128,
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+ - RTLIB::EXP_PPCF128, Results);
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+ + ExpandFPLibCall(Node, RTLIB::EXP_F32, RTLIB::EXP_F64, RTLIB::EXP_F80,
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+ + RTLIB::EXP_F128, RTLIB::EXP_PPCF128, Results);
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+ break;
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+ case ISD::FEXP2:
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+ case ISD::STRICT_FEXP2:
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+ - if (CanUseFiniteLibCall && DAG.getLibInfo().has(LibFunc_exp2_finite))
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+ - ExpandFPLibCall(Node, RTLIB::EXP2_FINITE_F32,
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+ - RTLIB::EXP2_FINITE_F64,
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+ - RTLIB::EXP2_FINITE_F80,
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+ - RTLIB::EXP2_FINITE_F128,
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+ - RTLIB::EXP2_FINITE_PPCF128, Results);
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+ - else
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+ - ExpandFPLibCall(Node, RTLIB::EXP2_F32, RTLIB::EXP2_F64,
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+ - RTLIB::EXP2_F80, RTLIB::EXP2_F128,
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+ - RTLIB::EXP2_PPCF128, Results);
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+ + ExpandFPLibCall(Node, RTLIB::EXP2_F32, RTLIB::EXP2_F64, RTLIB::EXP2_F80,
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+ + RTLIB::EXP2_F128, RTLIB::EXP2_PPCF128, Results);
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+ break;
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+ case ISD::FTRUNC:
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+ case ISD::STRICT_FTRUNC:
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+ @@ -4181,16 +4140,8 @@ void SelectionDAGLegalize::ConvertNodeToLibcall(SDNode *Node) {
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+ }
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+ case ISD::FPOW:
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+ case ISD::STRICT_FPOW:
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+ - if (CanUseFiniteLibCall && DAG.getLibInfo().has(LibFunc_pow_finite))
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+ - ExpandFPLibCall(Node, RTLIB::POW_FINITE_F32,
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+ - RTLIB::POW_FINITE_F64,
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+ - RTLIB::POW_FINITE_F80,
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+ - RTLIB::POW_FINITE_F128,
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+ - RTLIB::POW_FINITE_PPCF128, Results);
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+ - else
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+ - ExpandFPLibCall(Node, RTLIB::POW_F32, RTLIB::POW_F64,
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+ - RTLIB::POW_F80, RTLIB::POW_F128,
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+ - RTLIB::POW_PPCF128, Results);
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+ + ExpandFPLibCall(Node, RTLIB::POW_F32, RTLIB::POW_F64, RTLIB::POW_F80,
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+ + RTLIB::POW_F128, RTLIB::POW_PPCF128, Results);
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+ break;
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+ case ISD::LROUND:
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+ case ISD::STRICT_LROUND:
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+ diff --git a/llvm/test/CodeGen/AArch64/illegal-float-ops.ll b/llvm/test/CodeGen/AArch64/illegal-float-ops.ll
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+ index ffa813e09c7..5f24cd4bf63 100644
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+ --- a/llvm/test/CodeGen/AArch64/illegal-float-ops.ll
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+ +++ b/llvm/test/CodeGen/AArch64/illegal-float-ops.ll
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+ @@ -1,5 +1,5 @@
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+ ; RUN: llc -mtriple=aarch64-none-linux-gnu -verify-machineinstrs -o - %s | FileCheck %s
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+ -; RUN: llc -mtriple=aarch64-linux-android -verify-machineinstrs -o - %s | FileCheck --check-prefix=ANDROID-AARCH64 %s
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+ +; RUN: llc -mtriple=aarch64-linux-android -verify-machineinstrs -o - %s | FileCheck %s
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+
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+ @varfloat = global float 0.0
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+ @vardouble = global double 0.0
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+ @@ -299,7 +299,7 @@ define void @test_exp_finite(double %double) #0 {
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+ %expdouble = call double @llvm.exp.f64(double %double)
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+ store double %expdouble, double* @vardouble
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+ ; ANDROID-AARCH64-NOT: bl __exp_finite
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+ - ; CHECK: bl __exp_finite
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+ + ; CHECK: bl exp
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+
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+ ret void
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+ }
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+ @@ -307,8 +307,8 @@ define void @test_exp_finite(double %double) #0 {
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+ define void @test_exp2_finite(double %double) #0 {
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+ %expdouble = call double @llvm.exp2.f64(double %double)
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+ store double %expdouble, double* @vardouble
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+ - ; ANDROID-AARCH64-NOT: bl __exp2_finite
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+ - ; CHECK: bl __exp2_finite
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+ + ; CHECK-NOT: bl __exp2_finite
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+ + ; CHECK: bl exp2
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+
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+ ret void
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+ }
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+ @@ -316,32 +316,32 @@ define void @test_exp2_finite(double %double) #0 {
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+ define void @test_log_finite(double %double) #0 {
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+ %logdouble = call double @llvm.log.f64(double %double)
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+ store double %logdouble, double* @vardouble
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+ - ; ANDROID-AARCH64-NOT: bl __log_finite
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+ - ; CHECK: bl __log_finite
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+ + ; CHECK-NOT: bl __log_finite
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+ + ; CHECK: bl log
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+ ret void
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+ }
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+
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+ define void @test_log2_finite(double %double) #0 {
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+ %log2double = call double @llvm.log2.f64(double %double)
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+ store double %log2double, double* @vardouble
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+ - ; ANDROID-AARCH64-NOT: bl __log2_finite
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+ - ; CHECK: bl __log2_finite
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+ + ; CHECK-NOT: bl __log2_finite
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+ + ; CHECK: bl log2
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+ ret void
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+ }
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+
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+ define void @test_log10_finite(double %double) #0 {
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+ %log10double = call double @llvm.log10.f64(double %double)
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+ store double %log10double, double* @vardouble
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+ - ; ANDROID-AARCH64-NOT: bl __log10_finite
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+ - ; CHECK: bl __log10_finite
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+ + ; CHECK-NOT: bl __log10_finite
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+ + ; CHECK: bl log10
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+ ret void
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+ }
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+
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+ define void @test_pow_finite(double %double) #0 {
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+ %powdouble = call double @llvm.pow.f64(double %double, double %double)
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+ store double %powdouble, double* @vardouble
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+ - ; ANDROID-AARCH64-NOT: bl __pow_finite
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+ - ; CHECK: bl __pow_finite
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+ + ; CHECK-NOT: bl __pow_finite
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+ + ; CHECK: bl pow
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+ ret void
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+ }
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+
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+ diff --git a/llvm/test/CodeGen/X86/finite-libcalls.ll b/llvm/test/CodeGen/X86/finite-libcalls.ll
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+ index d54ee48ea74..31fadfb0aff 100644
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+ --- a/llvm/test/CodeGen/X86/finite-libcalls.ll
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+ +++ b/llvm/test/CodeGen/X86/finite-libcalls.ll
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+ @@ -9,7 +9,7 @@
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+ define float @exp_f32(float %x) #0 {
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+ ; GNU-LABEL: exp_f32:
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+ ; GNU: # %bb.0:
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+ -; GNU-NEXT: jmp __expf_finite # TAILCALL
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+ +; GNU-NEXT: jmp expf # TAILCALL
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+ ;
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+ ; WIN-LABEL: exp_f32:
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+ ; WIN: # %bb.0:
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+ @@ -25,7 +25,7 @@ define float @exp_f32(float %x) #0 {
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+ define double @exp_f64(double %x) #0 {
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+ ; GNU-LABEL: exp_f64:
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+ ; GNU: # %bb.0:
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+ -; GNU-NEXT: jmp __exp_finite # TAILCALL
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+ +; GNU-NEXT: jmp exp # TAILCALL
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+ ;
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+ ; WIN-LABEL: exp_f64:
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+ ; WIN: # %bb.0:
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+ @@ -44,7 +44,7 @@ define x86_fp80 @exp_f80(x86_fp80 %x) #0 {
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+ ; GNU-NEXT: subq $24, %rsp
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+ ; GNU-NEXT: fldt {{[0-9]+}}(%rsp)
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+ ; GNU-NEXT: fstpt (%rsp)
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+ -; GNU-NEXT: callq __expl_finite
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+ +; GNU-NEXT: callq expl
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+ ; GNU-NEXT: addq $24, %rsp
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+ ; GNU-NEXT: retq
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+ ;
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+ @@ -80,7 +80,7 @@ define x86_fp80 @exp_f80(x86_fp80 %x) #0 {
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+ define float @exp2_f32(float %x) #0 {
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+ ; GNU-LABEL: exp2_f32:
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+ ; GNU: # %bb.0:
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+ -; GNU-NEXT: jmp __exp2f_finite # TAILCALL
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+ +; GNU-NEXT: jmp exp2f # TAILCALL
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+ ;
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+ ; WIN-LABEL: exp2_f32:
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+ ; WIN: # %bb.0:
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+ @@ -96,7 +96,7 @@ define float @exp2_f32(float %x) #0 {
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+ define double @exp2_f64(double %x) #0 {
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+ ; GNU-LABEL: exp2_f64:
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+ ; GNU: # %bb.0:
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+ -; GNU-NEXT: jmp __exp2_finite # TAILCALL
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+ +; GNU-NEXT: jmp exp2 # TAILCALL
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+ ;
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+ ; WIN-LABEL: exp2_f64:
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+ ; WIN: # %bb.0:
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+ @@ -115,7 +115,7 @@ define x86_fp80 @exp2_f80(x86_fp80 %x) #0 {
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+ ; GNU-NEXT: subq $24, %rsp
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+ ; GNU-NEXT: fldt {{[0-9]+}}(%rsp)
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+ ; GNU-NEXT: fstpt (%rsp)
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+ -; GNU-NEXT: callq __exp2l_finite
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+ +; GNU-NEXT: callq exp2l
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+ ; GNU-NEXT: addq $24, %rsp
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+ ; GNU-NEXT: retq
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+ ;
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+ @@ -151,7 +151,7 @@ define x86_fp80 @exp2_f80(x86_fp80 %x) #0 {
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+ define float @log_f32(float %x) #0 {
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+ ; GNU-LABEL: log_f32:
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+ ; GNU: # %bb.0:
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+ -; GNU-NEXT: jmp __logf_finite # TAILCALL
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+ +; GNU-NEXT: jmp logf # TAILCALL
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+ ;
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+ ; WIN-LABEL: log_f32:
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+ ; WIN: # %bb.0:
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+ @@ -167,7 +167,7 @@ define float @log_f32(float %x) #0 {
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+ define double @log_f64(double %x) #0 {
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+ ; GNU-LABEL: log_f64:
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+ ; GNU: # %bb.0:
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+ -; GNU-NEXT: jmp __log_finite # TAILCALL
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+ +; GNU-NEXT: jmp log # TAILCALL
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+ ;
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+ ; WIN-LABEL: log_f64:
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+ ; WIN: # %bb.0:
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+ @@ -186,7 +186,7 @@ define x86_fp80 @log_f80(x86_fp80 %x) #0 {
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+ ; GNU-NEXT: subq $24, %rsp
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+ ; GNU-NEXT: fldt {{[0-9]+}}(%rsp)
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+ ; GNU-NEXT: fstpt (%rsp)
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+ -; GNU-NEXT: callq __logl_finite
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+ +; GNU-NEXT: callq logl
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+ ; GNU-NEXT: addq $24, %rsp
|
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+ ; GNU-NEXT: retq
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+ ;
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+ @@ -222,7 +222,7 @@ define x86_fp80 @log_f80(x86_fp80 %x) #0 {
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+ define float @log2_f32(float %x) #0 {
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+ ; GNU-LABEL: log2_f32:
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+ ; GNU: # %bb.0:
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+ -; GNU-NEXT: jmp __log2f_finite # TAILCALL
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+ +; GNU-NEXT: jmp log2f # TAILCALL
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+ ;
|
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+ ; WIN-LABEL: log2_f32:
|
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+ ; WIN: # %bb.0:
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+ @@ -238,7 +238,7 @@ define float @log2_f32(float %x) #0 {
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+ define double @log2_f64(double %x) #0 {
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+ ; GNU-LABEL: log2_f64:
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+ ; GNU: # %bb.0:
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+ -; GNU-NEXT: jmp __log2_finite # TAILCALL
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+ +; GNU-NEXT: jmp log2 # TAILCALL
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+ ;
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+ ; WIN-LABEL: log2_f64:
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+ ; WIN: # %bb.0:
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+ @@ -257,7 +257,7 @@ define x86_fp80 @log2_f80(x86_fp80 %x) #0 {
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+ ; GNU-NEXT: subq $24, %rsp
|
| |
+ ; GNU-NEXT: fldt {{[0-9]+}}(%rsp)
|
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+ ; GNU-NEXT: fstpt (%rsp)
|
| |
+ -; GNU-NEXT: callq __log2l_finite
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| |
+ +; GNU-NEXT: callq log2l
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+ ; GNU-NEXT: addq $24, %rsp
|
| |
+ ; GNU-NEXT: retq
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+ ;
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+ @@ -293,7 +293,7 @@ define x86_fp80 @log2_f80(x86_fp80 %x) #0 {
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+ define float @log10_f32(float %x) #0 {
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+ ; GNU-LABEL: log10_f32:
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+ ; GNU: # %bb.0:
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+ -; GNU-NEXT: jmp __log10f_finite # TAILCALL
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+ +; GNU-NEXT: jmp log10f # TAILCALL
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+ ;
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+ ; WIN-LABEL: log10_f32:
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+ ; WIN: # %bb.0:
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+ @@ -309,7 +309,7 @@ define float @log10_f32(float %x) #0 {
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+ define double @log10_f64(double %x) #0 {
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+ ; GNU-LABEL: log10_f64:
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+ ; GNU: # %bb.0:
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+ -; GNU-NEXT: jmp __log10_finite # TAILCALL
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+ +; GNU-NEXT: jmp log10 # TAILCALL
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+ ;
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+ ; WIN-LABEL: log10_f64:
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+ ; WIN: # %bb.0:
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+ @@ -328,7 +328,7 @@ define x86_fp80 @log10_f80(x86_fp80 %x) #0 {
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+ ; GNU-NEXT: subq $24, %rsp
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+ ; GNU-NEXT: fldt {{[0-9]+}}(%rsp)
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+ ; GNU-NEXT: fstpt (%rsp)
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+ -; GNU-NEXT: callq __log10l_finite
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+ +; GNU-NEXT: callq log10l
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+ ; GNU-NEXT: addq $24, %rsp
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+ ; GNU-NEXT: retq
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+ ;
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+ @@ -365,7 +365,7 @@ define float @pow_f32(float %x) #0 {
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+ ; GNU-LABEL: pow_f32:
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+ ; GNU: # %bb.0:
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+ ; GNU-NEXT: movaps %xmm0, %xmm1
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+ -; GNU-NEXT: jmp __powf_finite # TAILCALL
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+ +; GNU-NEXT: jmp powf # TAILCALL
|
| |
+ ;
|
| |
+ ; WIN-LABEL: pow_f32:
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| |
+ ; WIN: # %bb.0:
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+ @@ -384,7 +384,7 @@ define double @pow_f64(double %x) #0 {
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+ ; GNU-LABEL: pow_f64:
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+ ; GNU: # %bb.0:
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| |
+ ; GNU-NEXT: movaps %xmm0, %xmm1
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+ -; GNU-NEXT: jmp __pow_finite # TAILCALL
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| |
+ +; GNU-NEXT: jmp pow # TAILCALL
|
| |
+ ;
|
| |
+ ; WIN-LABEL: pow_f64:
|
| |
+ ; WIN: # %bb.0:
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| |
+ @@ -407,7 +407,7 @@ define x86_fp80 @pow_f80(x86_fp80 %x) #0 {
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+ ; GNU-NEXT: fld %st(0)
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| |
+ ; GNU-NEXT: fstpt {{[0-9]+}}(%rsp)
|
| |
+ ; GNU-NEXT: fstpt (%rsp)
|
| |
+ -; GNU-NEXT: callq __powl_finite
|
| |
+ +; GNU-NEXT: callq powl
|
| |
+ ; GNU-NEXT: addq $40, %rsp
|
| |
+ ; GNU-NEXT: retq
|
| |
+ ;
|
| |
+ --
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| |
+ 2.24.1
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+
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