derek.holloway
7502bf64a4
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107 lines
3.1 KiB
LLVM
107 lines
3.1 KiB
LLVM
; RUN: llc < %s -asm-verbose=false -fast-isel -fast-isel-abort=1 -verify-machineinstrs | FileCheck %s
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target triple = "wasm32-unknown-unknown"
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; FastISel should not fold one of the add/sub operands into a load/store's
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; offset when 'nuw' (no unsigned wrap) is not present, because the address
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; calculation does not wrap. When there is an add/sub and nuw is not present, we
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; bail out of FastISel.
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@mylabel = external global ptr
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; CHECK-LABEL: dont_fold_non_nuw_add_load:
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; CHECK: local.get 0
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; CHECK-NEXT: i32.const 2147483644
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; CHECK-NEXT: i32.add
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; CHECK-NEXT: i32.load 0
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define i32 @dont_fold_non_nuw_add_load(ptr %p) {
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%q = ptrtoint ptr %p to i32
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%r = add i32 %q, 2147483644
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%s = inttoptr i32 %r to ptr
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%t = load i32, ptr %s
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ret i32 %t
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}
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; CHECK-LABEL: dont_fold_non_nuw_add_store:
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; CHECK: local.get 0
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; CHECK-NEXT: i32.const 2147483644
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; CHECK-NEXT: i32.add
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; CHECK-NEXT: i32.const 5
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; CHECK-NEXT: i32.store 0
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define void @dont_fold_non_nuw_add_store(ptr %p) {
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%q = ptrtoint ptr %p to i32
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%r = add i32 %q, 2147483644
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%s = inttoptr i32 %r to ptr
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store i32 5, ptr %s
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ret void
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}
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; CHECK-LABEL: dont_fold_non_nuw_add_load_2:
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; CHECK: i32.const mylabel
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; CHECK-NEXT: i32.const -4
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; CHECK-NEXT: i32.add
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; CHECK-NEXT: i32.load 0
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define i32 @dont_fold_non_nuw_add_load_2() {
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%t = load i32, ptr inttoptr (i32 add (i32 ptrtoint (ptr @mylabel to i32), i32 -4) to ptr), align 4
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ret i32 %t
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}
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; CHECK-LABEL: dont_fold_non_nuw_add_store_2:
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; CHECK: i32.const mylabel
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; CHECK-NEXT: i32.const -4
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; CHECK-NEXT: i32.add
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; CHECK-NEXT: i32.const 5
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; CHECK-NEXT: i32.store 0
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define void @dont_fold_non_nuw_add_store_2() {
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store i32 5, ptr inttoptr (i32 add (i32 ptrtoint (ptr @mylabel to i32), i32 -4) to ptr), align 4
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ret void
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}
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; CHECK-LABEL: dont_fold_non_nuw_sub_load:
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; CHECK: local.get 0
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; CHECK-NEXT: i32.const -2147483644
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; CHECK-NEXT: i32.sub
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; CHECK-NEXT: i32.load 0
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define i32 @dont_fold_non_nuw_sub_load(ptr %p) {
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%q = ptrtoint ptr %p to i32
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%r = sub i32 %q, -2147483644
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%s = inttoptr i32 %r to ptr
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%t = load i32, ptr %s
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ret i32 %t
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}
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; CHECK-LABEL: dont_fold_non_nuw_sub_store:
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; CHECK: local.get 0
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; CHECK-NEXT: i32.const -2147483644
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; CHECK-NEXT: i32.sub
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; CHECK-NEXT: i32.const 5
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; CHECK-NEXT: i32.store 0
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define void @dont_fold_non_nuw_sub_store(ptr %p) {
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%q = ptrtoint ptr %p to i32
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%r = sub i32 %q, -2147483644
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%s = inttoptr i32 %r to ptr
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store i32 5, ptr %s
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ret void
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}
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; CHECK-LABEL: dont_fold_non_nuw_sub_load_2:
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; CHECK: i32.const mylabel
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; CHECK-NEXT: i32.const 4
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; CHECK-NEXT: i32.sub
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; CHECK-NEXT: i32.load 0
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define i32 @dont_fold_non_nuw_sub_load_2() {
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%t = load i32, ptr inttoptr (i32 sub (i32 ptrtoint (ptr @mylabel to i32), i32 4) to ptr), align 4
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ret i32 %t
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}
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; CHECK-LABEL: dont_fold_non_nuw_sub_store_2:
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; CHECK: i32.const mylabel
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; CHECK-NEXT: i32.const 4
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; CHECK-NEXT: i32.sub
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; CHECK-NEXT: i32.const 5
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; CHECK-NEXT: i32.store 0
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define void @dont_fold_non_nuw_sub_store_2() {
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store i32 5, ptr inttoptr (i32 sub (i32 ptrtoint (ptr @mylabel to i32), i32 4) to ptr), align 4
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ret void
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}
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