diff options
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp | 15 | ||||
| -rw-r--r-- | llvm/lib/Target/Mips/MipsLegalizerInfo.cpp | 4 | ||||
| -rw-r--r-- | llvm/test/CodeGen/Mips/GlobalISel/legalizer/trunc.mir | 30 | ||||
| -rw-r--r-- | llvm/test/CodeGen/Mips/GlobalISel/llvm-ir/trunc.ll | 13 |
4 files changed, 62 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp index 26c25ba26d4..4622248102e 100644 --- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp +++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp @@ -633,6 +633,21 @@ LegalizerHelper::LegalizeResult LegalizerHelper::narrowScalar(MachineInstr &MI, MI.eraseFromParent(); return Legalized; } + case TargetOpcode::G_TRUNC: { + if (TypeIdx != 1) + return UnableToLegalize; + + uint64_t SizeOp1 = MRI.getType(MI.getOperand(1).getReg()).getSizeInBits(); + if (NarrowTy.getSizeInBits() * 2 != SizeOp1) { + LLVM_DEBUG(dbgs() << "Can't narrow trunc to type " << NarrowTy << "\n"); + return UnableToLegalize; + } + + auto Unmerge = MIRBuilder.buildUnmerge(NarrowTy, MI.getOperand(1).getReg()); + MIRBuilder.buildCopy(MI.getOperand(0).getReg(), Unmerge.getReg(0)); + MI.eraseFromParent(); + return Legalized; + } case TargetOpcode::G_ADD: { // FIXME: add support for when SizeOp0 isn't an exact multiple of diff --git a/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp b/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp index 558af42cf7e..456411682ca 100644 --- a/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp +++ b/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp @@ -54,6 +54,10 @@ MipsLegalizerInfo::MipsLegalizerInfo(const MipsSubtarget &ST) { {s32, p0, 16, 8}}) .minScalar(0, s32); + getActionDefinitionsBuilder(G_TRUNC) + .legalIf([](const LegalityQuery &Query) { return false; }) + .maxScalar(1, s32); + getActionDefinitionsBuilder(G_SELECT) .legalForCartesianProduct({p0, s32, s64}, {s32}) .minScalar(0, s32) diff --git a/llvm/test/CodeGen/Mips/GlobalISel/legalizer/trunc.mir b/llvm/test/CodeGen/Mips/GlobalISel/legalizer/trunc.mir new file mode 100644 index 00000000000..fb45cc3ea46 --- /dev/null +++ b/llvm/test/CodeGen/Mips/GlobalISel/legalizer/trunc.mir @@ -0,0 +1,30 @@ +# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py +# RUN: llc -O0 -mtriple=mipsel-linux-gnu -run-pass=legalizer -verify-machineinstrs %s -o - | FileCheck %s -check-prefixes=MIPS32 +--- | + + define void @trunc() {entry: ret void} + +... +--- +name: trunc +alignment: 2 +tracksRegLiveness: true +body: | + bb.1.entry: + liveins: $a0, $a1 + + ; MIPS32-LABEL: name: trunc + ; MIPS32: liveins: $a0, $a1 + ; MIPS32: [[COPY:%[0-9]+]]:_(s32) = COPY $a0 + ; MIPS32: [[COPY1:%[0-9]+]]:_(s32) = COPY $a1 + ; MIPS32: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY]](s32) + ; MIPS32: $v0 = COPY [[COPY2]](s32) + ; MIPS32: RetRA implicit $v0 + %1:_(s32) = COPY $a0 + %2:_(s32) = COPY $a1 + %0:_(s64) = G_MERGE_VALUES %1(s32), %2(s32) + %3:_(s32) = G_TRUNC %0(s64) + $v0 = COPY %3(s32) + RetRA implicit $v0 + +... diff --git a/llvm/test/CodeGen/Mips/GlobalISel/llvm-ir/trunc.ll b/llvm/test/CodeGen/Mips/GlobalISel/llvm-ir/trunc.ll new file mode 100644 index 00000000000..7ea5ad8c31b --- /dev/null +++ b/llvm/test/CodeGen/Mips/GlobalISel/llvm-ir/trunc.ll @@ -0,0 +1,13 @@ +; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py +; RUN: llc -O0 -mtriple=mipsel-linux-gnu -global-isel -verify-machineinstrs %s -o -| FileCheck %s -check-prefixes=MIPS32 + +define i32 @trunc(i64 %x) { +; MIPS32-LABEL: trunc: +; MIPS32: # %bb.0: # %entry +; MIPS32-NEXT: move $2, $4 +; MIPS32-NEXT: jr $ra +; MIPS32-NEXT: nop +entry: + %conv = trunc i64 %x to i32 + ret i32 %conv +} |
