[llvm] r295306 - [ARM] GlobalISel: Add reg bank mappings for G_SEQUENCE and G_EXTRACT
Diana Picus via llvm-commits
llvm-commits at lists.llvm.org
Thu Feb 16 03:00:32 PST 2017
Author: rovka
Date: Thu Feb 16 05:00:31 2017
New Revision: 295306
URL: http://llvm.org/viewvc/llvm-project?rev=295306&view=rev
Log:
[ARM] GlobalISel: Add reg bank mappings for G_SEQUENCE and G_EXTRACT
Support G_SEQUENCE and G_EXTRACT as needed for passing double precision floating
point values in the soft-fp float mode.
Modified:
llvm/trunk/lib/Target/ARM/ARMRegisterBankInfo.cpp
llvm/trunk/test/CodeGen/ARM/GlobalISel/arm-regbankselect.mir
Modified: llvm/trunk/lib/Target/ARM/ARMRegisterBankInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMRegisterBankInfo.cpp?rev=295306&r1=295305&r2=295306&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMRegisterBankInfo.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMRegisterBankInfo.cpp Thu Feb 16 05:00:31 2017
@@ -143,6 +143,32 @@ ARMRegisterBankInfo::getInstrMapping(con
case G_FRAME_INDEX:
OperandsMapping = getOperandsMapping({&ARM::ValueMappings[0], nullptr});
break;
+ case G_SEQUENCE: {
+ // We only support G_SEQUENCE for creating a double precision floating point
+ // value out of two GPRs.
+ LLT Ty1 = MRI.getType(MI.getOperand(1).getReg());
+ LLT Ty2 = MRI.getType(MI.getOperand(3).getReg());
+ if (Ty.getSizeInBits() != 64 || Ty1.getSizeInBits() != 32 ||
+ Ty2.getSizeInBits() != 32)
+ return InstructionMapping{};
+ OperandsMapping =
+ getOperandsMapping({&ARM::ValueMappings[6], &ARM::ValueMappings[0],
+ nullptr, &ARM::ValueMappings[0], nullptr});
+ break;
+ }
+ case G_EXTRACT: {
+ // We only support G_EXTRACT for splitting a double precision floating point
+ // value into two GPRs.
+ LLT Ty1 = MRI.getType(MI.getOperand(1).getReg());
+ LLT Ty2 = MRI.getType(MI.getOperand(2).getReg());
+ if (Ty.getSizeInBits() != 32 || Ty1.getSizeInBits() != 32 ||
+ Ty2.getSizeInBits() != 64)
+ return InstructionMapping{};
+ OperandsMapping =
+ getOperandsMapping({&ARM::ValueMappings[0], &ARM::ValueMappings[0],
+ &ARM::ValueMappings[6], nullptr, nullptr});
+ break;
+ }
default:
return InstructionMapping{};
}
Modified: llvm/trunk/test/CodeGen/ARM/GlobalISel/arm-regbankselect.mir
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/ARM/GlobalISel/arm-regbankselect.mir?rev=295306&r1=295305&r2=295306&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/ARM/GlobalISel/arm-regbankselect.mir (original)
+++ llvm/trunk/test/CodeGen/ARM/GlobalISel/arm-regbankselect.mir Thu Feb 16 05:00:31 2017
@@ -9,6 +9,8 @@
define void @test_fadd_s32() { ret void }
define void @test_fadd_s64() { ret void }
+
+ define void @test_soft_fp_s64() { ret void }
...
---
name: test_add_s32
@@ -202,5 +204,35 @@ body: |
BX_RET 14, _, implicit %d0
...
+---
+name: test_soft_fp_s64
+# CHECK-LABEL: name: test_soft_fp_s64
+legalized: true
+regBankSelected: false
+selected: false
+# CHECK: registers:
+# CHECK: - { id: 0, class: gprb }
+# CHECK: - { id: 1, class: gprb }
+# CHECK: - { id: 2, class: fprb }
+# CHECK: - { id: 3, class: gprb }
+# CHECK: - { id: 4, class: gprb }
+
+registers:
+ - { id: 0, class: _ }
+ - { id: 1, class: _ }
+ - { id: 2, class: _ }
+ - { id: 3, class: _ }
+ - { id: 4, class: _ }
+body: |
+ bb.0:
+ liveins: %r0, %r1
+
+ %0(s32) = COPY %r0
+ %1(s32) = COPY %r1
+ %2(s64) = G_SEQUENCE %0(s32), 0, %1(s32), 32
+ %3(s32), %4(s32) = G_EXTRACT %2(s64), 0, 32
+ %r0 = COPY %3(s32)
+ %r1 = COPY %4(s32)
+ BX_RET 14, _, implicit %r0, implicit %r1
...
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