Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
[WebAssembly] WebAssemblyFastISel getelementptr variable index support
Summary: Previously -fast-isel getelementptr would constant-fold non-constant i8 load/stores. Reviewers: sunfish Subscribers: jfb, dschuff, sbc100, llvm-commits Differential Revision: https://reviews.llvm.org/D34044 llvm-svn: 306060
- Loading branch information
1 parent
9b7c1d2
commit a31ec61
Showing
2 changed files
with
119 additions
and
1 deletion.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,100 @@ | ||
; RUN: llc < %s -asm-verbose=false -disable-wasm-explicit-locals -fast-isel -fast-isel-abort=1 | FileCheck %s | ||
|
||
; TODO: Merge this with offset.ll when fast-isel matches better. | ||
|
||
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128" | ||
target triple = "wasm32-unknown-unknown-elf" | ||
|
||
; CHECK-LABEL: store_i8_with_variable_gep_offset: | ||
; CHECK: i32.add $push[[L0:[0-9]+]]=, $0, $1{{$}} | ||
; CHECK: i32.const $push[[L1:[0-9]+]]=, 0{{$}} | ||
; CHECK: i32.store8 0($pop[[L0]]), $pop[[L1]]{{$}} | ||
define void @store_i8_with_variable_gep_offset(i8* %p, i32 %idx) { | ||
%s = getelementptr inbounds i8, i8* %p, i32 %idx | ||
store i8 0, i8* %s | ||
ret void | ||
} | ||
|
||
; CHECK-LABEL: store_i8_with_array_alloca_gep: | ||
; CHECK: i32.const $push[[L0:[0-9]+]]=, 0{{$}} | ||
; CHECK: i32.load $push[[L1:[0-9]+]]=, __stack_pointer($pop[[L0]]){{$}} | ||
; CHECK: i32.const $push[[L2:[0-9]+]]=, 32{{$}} | ||
; CHECK: i32.sub $push{{[0-9]+}}=, $pop[[L1]], $pop[[L2]]{{$}} | ||
; CHECK: i32.add $push[[L4:[0-9]+]]=, $pop{{[0-9]+}}, $0{{$}} | ||
; CHECK: i32.const $push[[L5:[0-9]+]]=, 0{{$}} | ||
; CHECK: i32.store8 0($pop[[L4]]), $pop[[L5]]{{$}} | ||
define hidden void @store_i8_with_array_alloca_gep(i32 %idx) { | ||
%A = alloca [30 x i8], align 16 | ||
%s = getelementptr inbounds [30 x i8], [30 x i8]* %A, i32 0, i32 %idx | ||
store i8 0, i8* %s, align 1 | ||
ret void | ||
} | ||
|
||
; CHECK-LABEL: store_i32_with_unfolded_gep_offset: | ||
; CHECK: i32.const $push[[L0:[0-9]+]]=, 24{{$}} | ||
; CHECK: i32.add $push[[L1:[0-9]+]]=, $0, $pop[[L0]]{{$}} | ||
; CHECK: i32.const $push[[L2:[0-9]+]]=, 0{{$}} | ||
; CHECK: i32.store 0($pop[[L1]]), $pop[[L2]]{{$}} | ||
define void @store_i32_with_unfolded_gep_offset(i32* %p) { | ||
%s = getelementptr i32, i32* %p, i32 6 | ||
store i32 0, i32* %s | ||
ret void | ||
} | ||
|
||
; CHECK-LABEL: store_i32_with_folded_gep_offset: | ||
; CHECK: i32.store 24($0), $pop{{[0-9]+$}} | ||
define void @store_i32_with_folded_gep_offset(i32* %p) { | ||
%s = getelementptr inbounds i32, i32* %p, i32 6 | ||
store i32 0, i32* %s | ||
ret void | ||
} | ||
|
||
; CHECK-LABEL: load_i32_with_folded_gep_offset: | ||
; CHECK: i32.load $push{{[0-9]+}}=, 24($0){{$}} | ||
define i32 @load_i32_with_folded_gep_offset(i32* %p) { | ||
%s = getelementptr inbounds i32, i32* %p, i32 6 | ||
%t = load i32, i32* %s | ||
ret i32 %t | ||
} | ||
|
||
; CHECK-LABEL: store_i64_with_unfolded_gep_offset: | ||
; CHECK: i32.const $push[[L0:[0-9]+]]=, 24{{$}} | ||
; CHECK: i32.add $push[[L1:[0-9]+]]=, $0, $pop[[L0]]{{$}} | ||
; CHECK: i64.const $push[[L2:[0-9]+]]=, 0{{$}} | ||
; CHECK: i64.store 0($pop[[L1]]), $pop[[L2]]{{$}} | ||
define void @store_i64_with_unfolded_gep_offset(i64* %p) { | ||
%s = getelementptr i64, i64* %p, i32 3 | ||
store i64 0, i64* %s | ||
ret void | ||
} | ||
|
||
; CHECK-LABEL: store_i8_with_folded_gep_offset: | ||
; CHECK: i32.store8 24($0), $pop{{[0-9]+$}} | ||
define void @store_i8_with_folded_gep_offset(i8* %p) { | ||
%s = getelementptr inbounds i8, i8* %p, i32 24 | ||
store i8 0, i8* %s | ||
ret void | ||
} | ||
|
||
; CHECK-LABEL: load_i8_u_with_folded_offset: | ||
; CHECK: i32.load8_u $push{{[0-9]+}}=, 24($0){{$}} | ||
define i32 @load_i8_u_with_folded_offset(i8* %p) { | ||
%q = ptrtoint i8* %p to i32 | ||
%r = add nuw i32 %q, 24 | ||
%s = inttoptr i32 %r to i8* | ||
%t = load i8, i8* %s | ||
%u = zext i8 %t to i32 | ||
ret i32 %u | ||
} | ||
|
||
; TODO: this should be load8_s, need to fold sign-/zero-extend in fast-isel | ||
; CHECK-LABEL: load_i8_s_with_folded_offset: | ||
; CHECK: i32.load8_u $push{{[0-9]+}}=, 24($0){{$}} | ||
define i32 @load_i8_s_with_folded_offset(i8* %p) { | ||
%q = ptrtoint i8* %p to i32 | ||
%r = add nuw i32 %q, 24 | ||
%s = inttoptr i32 %r to i8* | ||
%t = load i8, i8* %s | ||
%u = sext i8 %t to i32 | ||
ret i32 %u | ||
} |