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8e0d3d4cd7
Previously, an "r" constraint would mean the compiler provides a value on WebAssembly's operand stack. This was tricky to use properly, particularly since it isn't possible to declare a new local from within an inline asm string. With this patch, "r" provides the value in a WebAssembly local, and the local index is provided to the inline asm string. This requires inline asm to use get_local and set_local to read the register. This does potentially result in larger code size, however inline asm should hopefully be quite rare in WebAssembly. This also means that the "m" constraint can no longer be supported, as WebAssembly has nothing like a "memory operand" that includes an implicit get_local. This fixes PR34599 for the wasm32-unknown-unknown-wasm target (though not for the ELF target). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@317707 91177308-0d34-0410-b5e6-96231b3b80d8
105 lines
3.1 KiB
LLVM
105 lines
3.1 KiB
LLVM
; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -no-integrated-as | FileCheck %s
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; Test basic inline assembly. Pass -no-integrated-as since these aren't
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; actually valid assembly syntax.
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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-wasm"
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; CHECK-LABEL: foo:
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; CHECK-NEXT: .param i32{{$}}
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; CHECK-NEXT: .result i32{{$}}
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; CHECK-NEXT: #APP{{$}}
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; CHECK-NEXT: # 0 = aaa(0){{$}}
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; CHECK-NEXT: #NO_APP{{$}}
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; CHECK-NEXT: get_local $push0=, 0{{$}}
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; CHECK-NEXT: return $pop0{{$}}
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define i32 @foo(i32 %r) {
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entry:
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%0 = tail call i32 asm sideeffect "# $0 = aaa($1)", "=r,r"(i32 %r) #0, !srcloc !0
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ret i32 %0
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}
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; CHECK-LABEL: imm:
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; CHECK-NEXT: .result i32{{$}}
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; CHECK-NEXT: .local i32{{$}}
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; CHECK-NEXT: #APP{{$}}
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; CHECK-NEXT: # 0 = ccc(42){{$}}
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; CHECK-NEXT: #NO_APP{{$}}
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; CHECK-NEXT: get_local $push0=, 0{{$}}
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; CHECK-NEXT: return $pop0{{$}}
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define i32 @imm() {
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entry:
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%0 = tail call i32 asm sideeffect "# $0 = ccc($1)", "=r,i"(i32 42) #0, !srcloc !2
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ret i32 %0
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}
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; CHECK-LABEL: foo_i64:
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; CHECK-NEXT: .param i64{{$}}
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; CHECK-NEXT: .result i64{{$}}
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; CHECK-NEXT: #APP{{$}}
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; CHECK-NEXT: # 0 = aaa(0){{$}}
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; CHECK-NEXT: #NO_APP{{$}}
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; CHECK-NEXT: get_local $push0=, 0{{$}}
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; CHECK-NEXT: return $pop0{{$}}
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define i64 @foo_i64(i64 %r) {
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entry:
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%0 = tail call i64 asm sideeffect "# $0 = aaa($1)", "=r,r"(i64 %r) #0, !srcloc !0
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ret i64 %0
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}
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; CHECK-LABEL: X_i16:
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; CHECK: foo 1{{$}}
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; CHECK: get_local $push[[S0:[0-9]+]]=, 0{{$}}
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; CHECK-NEXT: get_local $push[[S1:[0-9]+]]=, 1{{$}}
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; CHECK-NEXT: i32.store16 0($pop[[S0]]), $pop[[S1]]{{$}}
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define void @X_i16(i16 * %t) {
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call void asm sideeffect "foo $0", "=*X,~{dirflag},~{fpsr},~{flags},~{memory}"(i16* %t)
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ret void
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}
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; CHECK-LABEL: X_ptr:
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; CHECK: foo 1{{$}}
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; CHECK: get_local $push[[S0:[0-9]+]]=, 0{{$}}
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; CHECK-NEXT: get_local $push[[S1:[0-9]+]]=, 1{{$}}
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; CHECK-NEXT: i32.store 0($pop[[S0]]), $pop[[S1]]{{$}}
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define void @X_ptr(i16 ** %t) {
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call void asm sideeffect "foo $0", "=*X,~{dirflag},~{fpsr},~{flags},~{memory}"(i16** %t)
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ret void
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}
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; CHECK-LABEL: funcname:
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; CHECK: foo funcname{{$}}
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define void @funcname() {
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tail call void asm sideeffect "foo $0", "i"(void ()* nonnull @funcname) #0, !srcloc !0
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ret void
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}
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; CHECK-LABEL: varname:
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; CHECK: foo gv+37{{$}}
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@gv = global [0 x i8] zeroinitializer
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define void @varname() {
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tail call void asm sideeffect "foo $0", "i"(i8* getelementptr inbounds ([0 x i8], [0 x i8]* @gv, i64 0, i64 37)) #0, !srcloc !0
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ret void
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}
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; CHECK-LABEL: r_constraint
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; CHECK: i32.const $push[[S0:[0-9]+]]=, 0{{$}}
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; CHECK-NEXT: set_local [[L0:[0-9]+]], $pop[[S0]]{{$}}
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; CHECK-NEXT: i32.const $push[[S1:[0-9]+]]=, 37{{$}}
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; CHECK-NEXT: set_local [[L1:[0-9]+]], $pop[[S1]]{{$}}
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; CHECK: foo [[L2:[0-9]+]], 1, [[L0]], [[L1]]{{$}}
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; CHECK: get_local $push{{[0-9]+}}=, [[L2]]{{$}}
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define hidden i32 @r_constraint(i32 %a, i32 %y) {
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entry:
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%z = bitcast i32 0 to i32
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%t0 = tail call i32 asm "foo $0, $1, $2, $3", "=r,r,r,r"(i32 %y, i32 %z, i32 37) #0, !srcloc !0
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ret i32 %t0
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}
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attributes #0 = { nounwind }
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!0 = !{i32 47}
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!1 = !{i32 145}
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!2 = !{i32 231}
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