4b9d7916ee
Add instruction patterns for matching load and store instructions with constant offsets in addresses. The code is fairly redundant due to the need to replicate everything between imm, tglobaldadr, and texternalsym, but this appears to be common tablegen practice. The main alternative appears to be to introduce matching functions with C++ code, but sticking with purely generated matchers seems better for now. Also note that this doesn't yet support offsets from getelementptr, which will be the most common case; that will depend on a change in target-independent code in order to set the NoUnsignedWrap flag, which I'll submit separately. Until then, the testcase uses ptrtoint+add+inttoptr with a nuw on the add. Also implement isLegalAddressingMode with an approximation of this. Differential Revision: http://reviews.llvm.org/D15538 llvm-svn: 255681
62 lines
1.9 KiB
LLVM
62 lines
1.9 KiB
LLVM
; RUN: llc < %s -asm-verbose=false | FileCheck %s
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; Test that the wasm-store-results pass makes users of stored values use the
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; result of store expressions to reduce get_local/set_local traffic.
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target datalayout = "e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown"
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; CHECK-LABEL: single_block:
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; CHECK-NOT: .local
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; CHECK: i32.const $push{{[0-9]+}}=, 0{{$}}
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; CHECK: i32.store $push[[STORE:[0-9]+]]=, 0($0), $pop{{[0-9]+}}{{$}}
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; CHECK: return $pop[[STORE]]{{$}}
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define i32 @single_block(i32* %p) {
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entry:
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store i32 0, i32* %p
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ret i32 0
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}
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; Test interesting corner cases for wasm-store-results, in which the operand of
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; a store ends up getting used by a phi, which needs special handling in the
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; dominance test, since phis use their operands on their incoming edges.
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%class.Vec3 = type { float, float, float }
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@pos = global %class.Vec3 zeroinitializer, align 4
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; CHECK-LABEL: foo:
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; CHECK: i32.store $discard=, pos($0), $0{{$}}
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define void @foo() {
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for.body.i:
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br label %for.body5.i
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for.body5.i:
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%i.0168.i = phi i32 [ 0, %for.body.i ], [ %inc.i, %for.body5.i ]
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%conv6.i = sitofp i32 %i.0168.i to float
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store volatile float 0.0, float* getelementptr inbounds (%class.Vec3, %class.Vec3* @pos, i32 0, i32 0)
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%inc.i = add nuw nsw i32 %i.0168.i, 1
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%exitcond.i = icmp eq i32 %inc.i, 256
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br i1 %exitcond.i, label %for.cond.cleanup4.i, label %for.body5.i
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for.cond.cleanup4.i:
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ret void
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}
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; CHECK-LABEL: bar:
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; CHECK: i32.store $discard=, pos($0), $0{{$}}
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define void @bar() {
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for.body.i:
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br label %for.body5.i
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for.body5.i:
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%i.0168.i = phi float [ 0.0, %for.body.i ], [ %inc.i, %for.body5.i ]
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store volatile float 0.0, float* getelementptr inbounds (%class.Vec3, %class.Vec3* @pos, i32 0, i32 0)
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%inc.i = fadd float %i.0168.i, 1.0
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%exitcond.i = fcmp oeq float %inc.i, 256.0
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br i1 %exitcond.i, label %for.cond.cleanup4.i, label %for.body5.i
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for.cond.cleanup4.i:
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ret void
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}
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