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Similar to bitcast, treat addrspacecast as a foldable operand.
Added a test sink-addrspacecast.ll to verify this change. Patch by Jingyue Wu. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209343 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1640,6 +1640,7 @@ bool AddressingModeMatcher::MatchScaledValue(Value *ScaleReg, int64_t Scale,
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static bool MightBeFoldableInst(Instruction *I) {
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switch (I->getOpcode()) {
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case Instruction::BitCast:
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case Instruction::AddrSpaceCast:
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// Don't touch identity bitcasts.
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if (I->getType() == I->getOperand(0)->getType())
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return false;
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@ -1994,6 +1995,7 @@ bool AddressingModeMatcher::MatchOperationAddr(User *AddrInst, unsigned Opcode,
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return MatchAddr(AddrInst->getOperand(0), Depth);
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return false;
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case Instruction::BitCast:
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case Instruction::AddrSpaceCast:
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// BitCast is always a noop, and we can handle it as long as it is
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// int->int or pointer->pointer (we don't want int<->fp or something).
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if ((AddrInst->getOperand(0)->getType()->isPointerTy() ||
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37
test/Transforms/CodeGenPrepare/X86/sink-addrspacecast.ll
Normal file
37
test/Transforms/CodeGenPrepare/X86/sink-addrspacecast.ll
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@ -0,0 +1,37 @@
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; RUN: opt -S -codegenprepare < %s | FileCheck %s
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target datalayout =
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"e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
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target triple = "x86_64-unknown-linux-gnu"
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; CHECK-LABEL: @load_cast_gep
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; CHECK: add i64 %sunkaddr, 40
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define void @load_cast_gep(i1 %cond, i64* %base) {
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entry:
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%addr = getelementptr inbounds i64* %base, i64 5
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%casted = addrspacecast i64* %addr to i32 addrspace(1)*
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br i1 %cond, label %if.then, label %fallthrough
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if.then:
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%v = load i32 addrspace(1)* %casted, align 4
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br label %fallthrough
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fallthrough:
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ret void
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}
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; CHECK-LABEL: @store_gep_cast
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; CHECK: add i64 %sunkaddr, 20
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define void @store_gep_cast(i1 %cond, i64* %base) {
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entry:
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%casted = addrspacecast i64* %base to i32 addrspace(1)*
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%addr = getelementptr inbounds i32 addrspace(1)* %casted, i64 5
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br i1 %cond, label %if.then, label %fallthrough
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if.then:
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store i32 0, i32 addrspace(1)* %addr, align 4
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br label %fallthrough
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fallthrough:
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ret void
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}
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