forked from OSchip/llvm-project
[AArch64] Support adding X[8-15,18] registers as CSRs.
Summary: Making X[8-15,18] registers call-saved is used to support CONFIG_ARM64_LSE_ATOMICS in Linux kernel. Signed-off-by: Tri Vo <trong@android.com> Reviewers: srhines, nickdesaulniers, javed.absar Reviewed By: nickdesaulniers Subscribers: kristof.beyls, jfb, cfe-commits Differential Revision: https://reviews.llvm.org/D52399 llvm-svn: 342990
This commit is contained in:
Tri Vo
parent
6fb1358a98
commit
28e7e60ea4
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@ -2334,6 +2334,42 @@ Reserve the x18 register (AArch64 only)
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Reserve the x20 register (AArch64 only)
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.. option:: -fcall-saved-x8
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Make the x8 register call-saved (AArch64 only)
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.. option:: -fcall-saved-x9
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Make the x9 register call-saved (AArch64 only)
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.. option:: -fcall-saved-x10
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Make the x10 register call-saved (AArch64 only)
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.. option:: -fcall-saved-x11
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Make the x11 register call-saved (AArch64 only)
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.. option:: -fcall-saved-x12
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Make the x12 register call-saved (AArch64 only)
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.. option:: -fcall-saved-x13
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Make the x13 register call-saved (AArch64 only)
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.. option:: -fcall-saved-x14
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Make the x14 register call-saved (AArch64 only)
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.. option:: -fcall-saved-x15
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Make the x15 register call-saved (AArch64 only)
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.. option:: -fcall-saved-x18
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Make the x18 register call-saved (AArch64 only)
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.. option:: -mfix-cortex-a53-835769, -mno-fix-cortex-a53-835769
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Workaround Cortex-A53 erratum 835769 (AArch64 only)
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@ -2054,6 +2054,10 @@ foreach i = {1-7,18,20} in
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def ffixed_x#i : Flag<["-"], "ffixed-x"#i>, Group<m_aarch64_Features_Group>,
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HelpText<"Reserve the "#i#" register (AArch64 only)">;
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foreach i = {8-15,18} in
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def fcall_saved_x#i : Flag<["-"], "fcall-saved-x"#i>, Group<m_aarch64_Features_Group>,
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HelpText<"Make the x"#i#" register call-saved (AArch64 only)">;
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def msign_return_address : Joined<["-"], "msign-return-address=">,
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Flags<[CC1Option]>, Group<m_Group>,
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HelpText<"Select return address signing scope">, Values<"none,all,non-leaf">;
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@ -251,6 +251,33 @@ fp16_fml_fallthrough:
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if (Args.hasArg(options::OPT_ffixed_x20))
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Features.push_back("+reserve-x20");
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if (Args.hasArg(options::OPT_fcall_saved_x8))
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Features.push_back("+call-saved-x8");
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if (Args.hasArg(options::OPT_fcall_saved_x9))
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Features.push_back("+call-saved-x9");
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if (Args.hasArg(options::OPT_fcall_saved_x10))
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Features.push_back("+call-saved-x10");
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if (Args.hasArg(options::OPT_fcall_saved_x11))
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Features.push_back("+call-saved-x11");
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if (Args.hasArg(options::OPT_fcall_saved_x12))
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Features.push_back("+call-saved-x12");
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if (Args.hasArg(options::OPT_fcall_saved_x13))
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Features.push_back("+call-saved-x13");
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if (Args.hasArg(options::OPT_fcall_saved_x14))
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Features.push_back("+call-saved-x14");
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if (Args.hasArg(options::OPT_fcall_saved_x15))
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Features.push_back("+call-saved-x15");
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if (Args.hasArg(options::OPT_fcall_saved_x18))
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Features.push_back("+call-saved-x18");
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if (Args.hasArg(options::OPT_mno_neg_immediates))
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Features.push_back("+no-neg-immediates");
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}
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@ -0,0 +1,58 @@
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// RUN: %clang -target aarch64-none-gnu -fcall-saved-x8 -### %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-CALL-SAVED-X8 %s
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// RUN: %clang -target aarch64-none-gnu -fcall-saved-x9 -### %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-CALL-SAVED-X9 %s
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// RUN: %clang -target aarch64-none-gnu -fcall-saved-x10 -### %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-CALL-SAVED-X10 %s
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// RUN: %clang -target aarch64-none-gnu -fcall-saved-x11 -### %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-CALL-SAVED-X11 %s
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// RUN: %clang -target aarch64-none-gnu -fcall-saved-x12 -### %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-CALL-SAVED-X12 %s
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// RUN: %clang -target aarch64-none-gnu -fcall-saved-x13 -### %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-CALL-SAVED-X13 %s
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// RUN: %clang -target aarch64-none-gnu -fcall-saved-x14 -### %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-CALL-SAVED-X14 %s
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// RUN: %clang -target aarch64-none-gnu -fcall-saved-x15 -### %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-CALL-SAVED-X15 %s
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// RUN: %clang -target aarch64-none-gnu -fcall-saved-x18 -### %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-CALL-SAVED-X18 %s
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// Test all call-saved-x# options together.
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// RUN: %clang -target aarch64-none-gnu \
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// RUN: -fcall-saved-x8 \
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// RUN: -fcall-saved-x9 \
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// RUN: -fcall-saved-x10 \
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// RUN: -fcall-saved-x11 \
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// RUN: -fcall-saved-x12 \
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// RUN: -fcall-saved-x13 \
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// RUN: -fcall-saved-x14 \
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// RUN: -fcall-saved-x15 \
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// RUN: -fcall-saved-x18 \
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// RUN: -### %s 2>&1 | FileCheck %s \
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// RUN: --check-prefix=CHECK-CALL-SAVED-X8 \
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// RUN: --check-prefix=CHECK-CALL-SAVED-X9 \
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// RUN: --check-prefix=CHECK-CALL-SAVED-X10 \
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// RUN: --check-prefix=CHECK-CALL-SAVED-X11 \
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// RUN: --check-prefix=CHECK-CALL-SAVED-X12 \
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// RUN: --check-prefix=CHECK-CALL-SAVED-X13 \
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// RUN: --check-prefix=CHECK-CALL-SAVED-X14 \
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// RUN: --check-prefix=CHECK-CALL-SAVED-X15 \
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// RUN: --check-prefix=CHECK-CALL-SAVED-X18
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// CHECK-CALL-SAVED-X8: "-target-feature" "+call-saved-x8"
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// CHECK-CALL-SAVED-X9: "-target-feature" "+call-saved-x9"
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// CHECK-CALL-SAVED-X10: "-target-feature" "+call-saved-x10"
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// CHECK-CALL-SAVED-X11: "-target-feature" "+call-saved-x11"
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// CHECK-CALL-SAVED-X12: "-target-feature" "+call-saved-x12"
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// CHECK-CALL-SAVED-X13: "-target-feature" "+call-saved-x13"
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// CHECK-CALL-SAVED-X14: "-target-feature" "+call-saved-x14"
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// CHECK-CALL-SAVED-X15: "-target-feature" "+call-saved-x15"
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// CHECK-CALL-SAVED-X18: "-target-feature" "+call-saved-x18"
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@ -0,0 +1,8 @@
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// Check that -ffixed and -fcall-saved flags work correctly together.
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// RUN: %clang -target aarch64-none-gnu \
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// RUN: -ffixed-x18 \
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// RUN: -fcall-saved-x18 \
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// RUN: -### %s 2>&1 | FileCheck %s
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// CHECK: "-target-feature" "+reserve-x18"
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// CHECK: "-target-feature" "+call-saved-x18"
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