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1386262329
The WebAssemly spec removing the return value from store instructions, so remove the associated optimization from LLVM. This patch leaves the store instruction operands in place for now, so stores now always write to "$drop"; these will be removed in a seperate patch. llvm-svn: 279100
423 lines
12 KiB
LLVM
423 lines
12 KiB
LLVM
; RUN: llc < %s -asm-verbose=false | FileCheck %s
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; Test constant load and store address offsets.
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown"
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; With an nuw add, we can fold an offset.
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; CHECK-LABEL: load_i32_with_folded_offset:
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; CHECK: i32.load $push0=, 24($0){{$}}
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define i32 @load_i32_with_folded_offset(i32* %p) {
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%q = ptrtoint i32* %p to i32
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%r = add nuw i32 %q, 24
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%s = inttoptr i32 %r to i32*
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%t = load i32, i32* %s
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ret i32 %t
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}
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; With an inbounds gep, we can fold an offset.
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; CHECK-LABEL: load_i32_with_folded_gep_offset:
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; CHECK: i32.load $push0=, 24($0){{$}}
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define i32 @load_i32_with_folded_gep_offset(i32* %p) {
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%s = getelementptr inbounds i32, i32* %p, i32 6
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%t = load i32, i32* %s
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ret i32 %t
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}
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; We can't fold a negative offset though, even with an inbounds gep.
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; CHECK-LABEL: load_i32_with_unfolded_gep_negative_offset:
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; CHECK: i32.const $push0=, -24{{$}}
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; CHECK: i32.add $push1=, $0, $pop0{{$}}
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; CHECK: i32.load $push2=, 0($pop1){{$}}
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define i32 @load_i32_with_unfolded_gep_negative_offset(i32* %p) {
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%s = getelementptr inbounds i32, i32* %p, i32 -6
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%t = load i32, i32* %s
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ret i32 %t
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}
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; Without nuw, and even with nsw, we can't fold an offset.
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; CHECK-LABEL: load_i32_with_unfolded_offset:
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; CHECK: i32.const $push0=, 24{{$}}
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; CHECK: i32.add $push1=, $0, $pop0{{$}}
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; CHECK: i32.load $push2=, 0($pop1){{$}}
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define i32 @load_i32_with_unfolded_offset(i32* %p) {
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%q = ptrtoint i32* %p to i32
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%r = add nsw i32 %q, 24
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%s = inttoptr i32 %r to i32*
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%t = load i32, i32* %s
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ret i32 %t
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}
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; Without inbounds, we can't fold a gep offset.
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; CHECK-LABEL: load_i32_with_unfolded_gep_offset:
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; CHECK: i32.const $push0=, 24{{$}}
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; CHECK: i32.add $push1=, $0, $pop0{{$}}
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; CHECK: i32.load $push2=, 0($pop1){{$}}
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define i32 @load_i32_with_unfolded_gep_offset(i32* %p) {
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%s = getelementptr i32, i32* %p, i32 6
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%t = load i32, i32* %s
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ret i32 %t
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}
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; Same as above but with i64.
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; CHECK-LABEL: load_i64_with_folded_offset:
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; CHECK: i64.load $push0=, 24($0){{$}}
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define i64 @load_i64_with_folded_offset(i64* %p) {
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%q = ptrtoint i64* %p to i32
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%r = add nuw i32 %q, 24
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%s = inttoptr i32 %r to i64*
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%t = load i64, i64* %s
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ret i64 %t
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}
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; Same as above but with i64.
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; CHECK-LABEL: load_i64_with_folded_gep_offset:
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; CHECK: i64.load $push0=, 24($0){{$}}
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define i64 @load_i64_with_folded_gep_offset(i64* %p) {
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%s = getelementptr inbounds i64, i64* %p, i32 3
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%t = load i64, i64* %s
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ret i64 %t
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}
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; Same as above but with i64.
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; CHECK-LABEL: load_i64_with_unfolded_gep_negative_offset:
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; CHECK: i32.const $push0=, -24{{$}}
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; CHECK: i32.add $push1=, $0, $pop0{{$}}
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; CHECK: i64.load $push2=, 0($pop1){{$}}
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define i64 @load_i64_with_unfolded_gep_negative_offset(i64* %p) {
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%s = getelementptr inbounds i64, i64* %p, i32 -3
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%t = load i64, i64* %s
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ret i64 %t
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}
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; Same as above but with i64.
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; CHECK-LABEL: load_i64_with_unfolded_offset:
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; CHECK: i32.const $push0=, 24{{$}}
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; CHECK: i32.add $push1=, $0, $pop0{{$}}
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; CHECK: i64.load $push2=, 0($pop1){{$}}
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define i64 @load_i64_with_unfolded_offset(i64* %p) {
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%q = ptrtoint i64* %p to i32
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%r = add nsw i32 %q, 24
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%s = inttoptr i32 %r to i64*
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%t = load i64, i64* %s
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ret i64 %t
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}
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; Same as above but with i64.
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; CHECK-LABEL: load_i64_with_unfolded_gep_offset:
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; CHECK: i32.const $push0=, 24{{$}}
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; CHECK: i32.add $push1=, $0, $pop0{{$}}
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; CHECK: i64.load $push2=, 0($pop1){{$}}
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define i64 @load_i64_with_unfolded_gep_offset(i64* %p) {
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%s = getelementptr i64, i64* %p, i32 3
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%t = load i64, i64* %s
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ret i64 %t
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}
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; CHECK-LABEL: load_i32_with_folded_or_offset:
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; CHECK: i32.load8_s $push{{[0-9]+}}=, 2($pop{{[0-9]+}}){{$}}
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define i32 @load_i32_with_folded_or_offset(i32 %x) {
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%and = and i32 %x, -4
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%t0 = inttoptr i32 %and to i8*
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%arrayidx = getelementptr inbounds i8, i8* %t0, i32 2
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%t1 = load i8, i8* %arrayidx, align 1
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%conv = sext i8 %t1 to i32
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ret i32 %conv
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}
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; Same as above but with store.
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; CHECK-LABEL: store_i32_with_folded_offset:
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; CHECK: i32.store $drop=, 24($0), $pop0{{$}}
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define void @store_i32_with_folded_offset(i32* %p) {
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%q = ptrtoint i32* %p to i32
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%r = add nuw i32 %q, 24
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%s = inttoptr i32 %r to i32*
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store i32 0, i32* %s
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ret void
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}
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; Same as above but with store.
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; CHECK-LABEL: store_i32_with_folded_gep_offset:
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; CHECK: i32.store $drop=, 24($0), $pop0{{$}}
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define void @store_i32_with_folded_gep_offset(i32* %p) {
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%s = getelementptr inbounds i32, i32* %p, i32 6
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store i32 0, i32* %s
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ret void
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}
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; Same as above but with store.
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; CHECK-LABEL: store_i32_with_unfolded_gep_negative_offset:
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; CHECK: i32.const $push0=, -24{{$}}
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; CHECK: i32.add $push1=, $0, $pop0{{$}}
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; CHECK: i32.store $drop=, 0($pop1), $pop2{{$}}
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define void @store_i32_with_unfolded_gep_negative_offset(i32* %p) {
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%s = getelementptr inbounds i32, i32* %p, i32 -6
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store i32 0, i32* %s
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ret void
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}
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; Same as above but with store.
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; CHECK-LABEL: store_i32_with_unfolded_offset:
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; CHECK: i32.const $push0=, 24{{$}}
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; CHECK: i32.add $push1=, $0, $pop0{{$}}
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; CHECK: i32.store $drop=, 0($pop1), $pop2{{$}}
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define void @store_i32_with_unfolded_offset(i32* %p) {
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%q = ptrtoint i32* %p to i32
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%r = add nsw i32 %q, 24
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%s = inttoptr i32 %r to i32*
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store i32 0, i32* %s
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ret void
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}
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; Same as above but with store.
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; CHECK-LABEL: store_i32_with_unfolded_gep_offset:
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; CHECK: i32.const $push0=, 24{{$}}
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; CHECK: i32.add $push1=, $0, $pop0{{$}}
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; CHECK: i32.store $drop=, 0($pop1), $pop2{{$}}
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define void @store_i32_with_unfolded_gep_offset(i32* %p) {
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%s = getelementptr i32, i32* %p, i32 6
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store i32 0, i32* %s
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ret void
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}
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; Same as above but with store with i64.
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; CHECK-LABEL: store_i64_with_folded_offset:
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; CHECK: i64.store $drop=, 24($0), $pop0{{$}}
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define void @store_i64_with_folded_offset(i64* %p) {
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%q = ptrtoint i64* %p to i32
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%r = add nuw i32 %q, 24
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%s = inttoptr i32 %r to i64*
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store i64 0, i64* %s
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ret void
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}
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; Same as above but with store with i64.
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; CHECK-LABEL: store_i64_with_folded_gep_offset:
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; CHECK: i64.store $drop=, 24($0), $pop0{{$}}
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define void @store_i64_with_folded_gep_offset(i64* %p) {
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%s = getelementptr inbounds i64, i64* %p, i32 3
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store i64 0, i64* %s
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ret void
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}
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; Same as above but with store with i64.
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; CHECK-LABEL: store_i64_with_unfolded_gep_negative_offset:
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; CHECK: i32.const $push0=, -24{{$}}
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; CHECK: i32.add $push1=, $0, $pop0{{$}}
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; CHECK: i64.store $drop=, 0($pop1), $pop2{{$}}
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define void @store_i64_with_unfolded_gep_negative_offset(i64* %p) {
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%s = getelementptr inbounds i64, i64* %p, i32 -3
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store i64 0, i64* %s
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ret void
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}
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; Same as above but with store with i64.
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; CHECK-LABEL: store_i64_with_unfolded_offset:
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; CHECK: i32.const $push0=, 24{{$}}
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; CHECK: i32.add $push1=, $0, $pop0{{$}}
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; CHECK: i64.store $drop=, 0($pop1), $pop2{{$}}
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define void @store_i64_with_unfolded_offset(i64* %p) {
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%q = ptrtoint i64* %p to i32
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%r = add nsw i32 %q, 24
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%s = inttoptr i32 %r to i64*
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store i64 0, i64* %s
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ret void
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}
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; Same as above but with store with i64.
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; CHECK-LABEL: store_i64_with_unfolded_gep_offset:
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; CHECK: i32.const $push0=, 24{{$}}
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; CHECK: i32.add $push1=, $0, $pop0{{$}}
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; CHECK: i64.store $drop=, 0($pop1), $pop2{{$}}
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define void @store_i64_with_unfolded_gep_offset(i64* %p) {
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%s = getelementptr i64, i64* %p, i32 3
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store i64 0, i64* %s
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ret void
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}
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; CHECK-LABEL: store_i32_with_folded_or_offset:
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; CHECK: i32.store8 $drop=, 2($pop{{[0-9]+}}), $pop{{[0-9]+}}{{$}}
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define void @store_i32_with_folded_or_offset(i32 %x) {
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%and = and i32 %x, -4
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%t0 = inttoptr i32 %and to i8*
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%arrayidx = getelementptr inbounds i8, i8* %t0, i32 2
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store i8 0, i8* %arrayidx, align 1
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ret void
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}
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; When loading from a fixed address, materialize a zero.
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; CHECK-LABEL: load_i32_from_numeric_address
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; CHECK: i32.const $push0=, 0{{$}}
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; CHECK: i32.load $push1=, 42($pop0){{$}}
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define i32 @load_i32_from_numeric_address() {
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%s = inttoptr i32 42 to i32*
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%t = load i32, i32* %s
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ret i32 %t
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}
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; CHECK-LABEL: load_i32_from_global_address
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; CHECK: i32.const $push0=, 0{{$}}
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; CHECK: i32.load $push1=, gv($pop0){{$}}
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@gv = global i32 0
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define i32 @load_i32_from_global_address() {
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%t = load i32, i32* @gv
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ret i32 %t
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}
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; CHECK-LABEL: store_i32_to_numeric_address:
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; CHECK-NEXT: i32.const $push0=, 0{{$}}
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; CHECK-NEXT: i32.const $push1=, 0{{$}}
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; CHECK-NEXT: i32.store $drop=, 42($pop0), $pop1{{$}}
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define void @store_i32_to_numeric_address() {
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%s = inttoptr i32 42 to i32*
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store i32 0, i32* %s
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ret void
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}
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; CHECK-LABEL: store_i32_to_global_address:
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; CHECK: i32.const $push0=, 0{{$}}
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; CHECK: i32.const $push1=, 0{{$}}
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; CHECK: i32.store $drop=, gv($pop0), $pop1{{$}}
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define void @store_i32_to_global_address() {
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store i32 0, i32* @gv
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ret void
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}
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; Fold an offset into a sign-extending load.
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; CHECK-LABEL: load_i8_s_with_folded_offset:
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; CHECK: i32.load8_s $push0=, 24($0){{$}}
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define i32 @load_i8_s_with_folded_offset(i8* %p) {
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%q = ptrtoint i8* %p to i32
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%r = add nuw i32 %q, 24
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%s = inttoptr i32 %r to i8*
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%t = load i8, i8* %s
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%u = sext i8 %t to i32
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ret i32 %u
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}
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; Fold a gep offset into a sign-extending load.
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; CHECK-LABEL: load_i8_s_with_folded_gep_offset:
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; CHECK: i32.load8_s $push0=, 24($0){{$}}
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define i32 @load_i8_s_with_folded_gep_offset(i8* %p) {
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%s = getelementptr inbounds i8, i8* %p, i32 24
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%t = load i8, i8* %s
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%u = sext i8 %t to i32
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ret i32 %u
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}
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; Fold an offset into a zero-extending load.
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; CHECK-LABEL: load_i8_u_with_folded_offset:
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; CHECK: i32.load8_u $push0=, 24($0){{$}}
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define i32 @load_i8_u_with_folded_offset(i8* %p) {
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%q = ptrtoint i8* %p to i32
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%r = add nuw i32 %q, 24
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%s = inttoptr i32 %r to i8*
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%t = load i8, i8* %s
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%u = zext i8 %t to i32
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ret i32 %u
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}
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; Fold a gep offset into a zero-extending load.
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; CHECK-LABEL: load_i8_u_with_folded_gep_offset:
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; CHECK: i32.load8_u $push0=, 24($0){{$}}
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define i32 @load_i8_u_with_folded_gep_offset(i8* %p) {
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%s = getelementptr inbounds i8, i8* %p, i32 24
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%t = load i8, i8* %s
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%u = zext i8 %t to i32
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ret i32 %u
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}
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; Fold an offset into a truncating store.
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; CHECK-LABEL: store_i8_with_folded_offset:
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; CHECK: i32.store8 $drop=, 24($0), $pop0{{$}}
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define void @store_i8_with_folded_offset(i8* %p) {
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%q = ptrtoint i8* %p to i32
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%r = add nuw i32 %q, 24
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%s = inttoptr i32 %r to i8*
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store i8 0, i8* %s
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ret void
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}
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; Fold a gep offset into a truncating store.
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; CHECK-LABEL: store_i8_with_folded_gep_offset:
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; CHECK: i32.store8 $drop=, 24($0), $pop0{{$}}
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define void @store_i8_with_folded_gep_offset(i8* %p) {
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%s = getelementptr inbounds i8, i8* %p, i32 24
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store i8 0, i8* %s
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ret void
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}
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; Fold the offsets when lowering aggregate loads and stores.
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; CHECK-LABEL: aggregate_load_store:
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; CHECK: i32.load $2=, 0($0){{$}}
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; CHECK: i32.load $3=, 4($0){{$}}
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; CHECK: i32.load $4=, 8($0){{$}}
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; CHECK: i32.load $push0=, 12($0){{$}}
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; CHECK: i32.store $drop=, 12($1), $pop0{{$}}
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; CHECK: i32.store $drop=, 8($1), $4{{$}}
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; CHECK: i32.store $drop=, 4($1), $3{{$}}
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; CHECK: i32.store $drop=, 0($1), $2{{$}}
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define void @aggregate_load_store({i32,i32,i32,i32}* %p, {i32,i32,i32,i32}* %q) {
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; volatile so that things stay in order for the tests above
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%t = load volatile {i32,i32,i32,i32}, {i32, i32,i32,i32}* %p
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store volatile {i32,i32,i32,i32} %t, {i32, i32,i32,i32}* %q
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ret void
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}
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; Fold the offsets when lowering aggregate return values. The stores get
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; merged into i64 stores.
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; CHECK-LABEL: aggregate_return:
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; CHECK: i64.const $push[[L0:[0-9]+]]=, 0{{$}}
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; CHECK: i64.store $drop=, 8($0):p2align=2, $pop[[L0]]{{$}}
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; CHECK: i64.const $push[[L1:[0-9]+]]=, 0{{$}}
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; CHECK: i64.store $drop=, 0($0):p2align=2, $pop[[L1]]{{$}}
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define {i32,i32,i32,i32} @aggregate_return() {
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ret {i32,i32,i32,i32} zeroinitializer
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}
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; Fold the offsets when lowering aggregate return values. The stores are not
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; merged.
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; CHECK-LABEL: aggregate_return_without_merge:
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; CHECK: i32.const $push[[L0:[0-9]+]]=, 0{{$}}
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; CHECK: i32.store8 $drop=, 14($0), $pop[[L0]]{{$}}
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; CHECK: i32.const $push[[L1:[0-9]+]]=, 0{{$}}
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; CHECK: i32.store16 $drop=, 12($0), $pop[[L1]]{{$}}
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; CHECK: i32.const $push[[L2:[0-9]+]]=, 0{{$}}
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; CHECK: i32.store $drop=, 8($0), $pop[[L2]]{{$}}
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; CHECK: i64.const $push[[L3:[0-9]+]]=, 0{{$}}
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; CHECK: i64.store $drop=, 0($0), $pop[[L3]]{{$}}
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define {i64,i32,i16,i8} @aggregate_return_without_merge() {
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ret {i64,i32,i16,i8} zeroinitializer
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}
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