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e2977673e9
For outgoing varargs arguments, it's necessary to check the OrigAlign field
of the corresponding OutputArg entry to determine argument alignment, rather
than just computing an alignment from the argument value type. This is
because types like fp128 are split into multiple argument values, with
narrower types that don't reflect the ABI alignment of the full fp128.
This fixes the printf("printfL: %4.*Lf\n", 2, lval); testcase.
Differential Revision: https://reviews.llvm.org/D58656
llvm-svn: 354846
195 lines
5.9 KiB
LLVM
195 lines
5.9 KiB
LLVM
; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -verify-machineinstrs | FileCheck %s
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; Test varargs constructs.
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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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; Test va_start.
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; TODO: Test va_start.
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; CHECK-LABEL: start:
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; CHECK-NEXT: .functype start (i32, i32) -> ()
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; CHECK-NOT: __stack_pointer
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define void @start(i8** %ap, ...) {
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entry:
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%0 = bitcast i8** %ap to i8*
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; Store the second argument (the hidden vararg buffer pointer) into ap
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; CHECK: i32.store 0($0), $1
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call void @llvm.va_start(i8* %0)
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ret void
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}
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; Test va_end.
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; CHECK-LABEL: end:
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; CHECK-NEXT: .functype end (i32) -> (){{$}}
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; CHECK-NEXT: return{{$}}
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define void @end(i8** %ap) {
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entry:
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%0 = bitcast i8** %ap to i8*
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call void @llvm.va_end(i8* %0)
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ret void
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}
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; Test va_copy.
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; CHECK-LABEL: copy:
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; CHECK-NEXT: .functype copy (i32, i32) -> (){{$}}
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; CHECK-NEXT: i32.load $push0=, 0($1){{$}}
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; CHECK-NEXT: i32.store 0($0), $pop0{{$}}
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; CHECK-NEXT: return{{$}}
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define void @copy(i8** %ap, i8** %bp) {
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entry:
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%0 = bitcast i8** %ap to i8*
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%1 = bitcast i8** %bp to i8*
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call void @llvm.va_copy(i8* %0, i8* %1)
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ret void
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}
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; Test va_arg with an i8 argument.
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; CHECK-LABEL: arg_i8:
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; CHECK-NEXT: .functype arg_i8 (i32) -> (i32){{$}}
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; CHECK-NEXT: i32.load $push[[NUM0:[0-9]+]]=, 0($0){{$}}
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; CHECK-NEXT: local.tee $push[[NUM1:[0-9]+]]=, $1=, $pop[[NUM0]]{{$}}
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; CHECK-NEXT: i32.const $push[[NUM2:[0-9]+]]=, 4{{$}}
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; CHECK-NEXT: i32.add $push[[NUM3:[0-9]+]]=, $pop[[NUM1]], $pop[[NUM2]]{{$}}
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; CHECK-NEXT: i32.store 0($0), $pop[[NUM3]]{{$}}
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; CHECK-NEXT: i32.load $push[[NUM4:[0-9]+]]=, 0($1){{$}}
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; CHECK-NEXT: return $pop[[NUM4]]{{$}}
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define i8 @arg_i8(i8** %ap) {
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entry:
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%t = va_arg i8** %ap, i8
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ret i8 %t
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}
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; Test va_arg with an i32 argument.
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; CHECK-LABEL: arg_i32:
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; CHECK-NEXT: .functype arg_i32 (i32) -> (i32){{$}}
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; CHECK-NEXT: i32.load $push[[NUM0:[0-9]+]]=, 0($0){{$}}
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; CHECK-NEXT: i32.const $push[[NUM1:[0-9]+]]=, 3{{$}}
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; CHECK-NEXT: i32.add $push[[NUM2:[0-9]+]]=, $pop[[NUM0]], $pop[[NUM1]]{{$}}
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; CHECK-NEXT: i32.const $push[[NUM3:[0-9]+]]=, -4{{$}}
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; CHECK-NEXT: i32.and $push[[NUM4:[0-9]+]]=, $pop[[NUM2]], $pop[[NUM3]]{{$}}
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; CHECK-NEXT: local.tee $push[[NUM5:[0-9]+]]=, $1=, $pop[[NUM4]]{{$}}
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; CHECK-NEXT: i32.const $push[[NUM6:[0-9]+]]=, 4{{$}}
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; CHECK-NEXT: i32.add $push[[NUM7:[0-9]+]]=, $pop[[NUM5]], $pop[[NUM6]]{{$}}
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; CHECK-NEXT: i32.store 0($0), $pop[[NUM7]]{{$}}
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; CHECK-NEXT: i32.load $push[[NUM8:[0-9]+]]=, 0($1){{$}}
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; CHECK-NEXT: return $pop[[NUM8]]{{$}}
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define i32 @arg_i32(i8** %ap) {
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entry:
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%t = va_arg i8** %ap, i32
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ret i32 %t
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}
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; Test va_arg with an i128 argument.
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; CHECK-LABEL: arg_i128:
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; CHECK-NEXT: .functype arg_i128 (i32, i32) -> (){{$}}
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; CHECK: i32.and
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; CHECK: i64.load
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; CHECK: i64.load
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; CHECK: return{{$}}
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define i128 @arg_i128(i8** %ap) {
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entry:
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%t = va_arg i8** %ap, i128
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ret i128 %t
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}
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; Test a varargs call with no actual arguments.
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declare void @callee(...)
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; CHECK-LABEL: caller_none:
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; CHECK: i32.const $push0=, 0
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; CHECK-NEXT: call callee, $pop0
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; CHECK-NEXT: return{{$}}
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define void @caller_none() {
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call void (...) @callee()
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ret void
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}
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; Test a varargs call with some actual arguments.
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; Note that the store of 2.0 is converted to an i64 store; this optimization
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; is not needed on WebAssembly, but there isn't currently a convenient hook for
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; disabling it.
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; CHECK-LABEL: caller_some
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; CHECK-DAG: i32.store
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; CHECK-DAG: i64.store
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define void @caller_some() {
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call void (...) @callee(i32 0, double 2.0)
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ret void
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}
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; Test a va_start call in a non-entry block
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; CHECK-LABEL: startbb:
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; CHECK: .functype startbb (i32, i32, i32) -> ()
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define void @startbb(i1 %cond, i8** %ap, ...) {
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entry:
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br i1 %cond, label %bb0, label %bb1
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bb0:
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ret void
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bb1:
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%0 = bitcast i8** %ap to i8*
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; Store the second argument (the hidden vararg buffer pointer) into ap
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; CHECK: i32.store 0($1), $2
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call void @llvm.va_start(i8* %0)
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ret void
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}
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; Test a call to a varargs function with a non-legal fixed argument.
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declare void @callee_with_nonlegal_fixed(fp128, ...) nounwind
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; CHECK-LABEL: call_nonlegal_fixed:
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; CHECK: i64.const $push[[L0:[0-9]+]]=, 0
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; CHECK: i64.const $push[[L1:[0-9]+]]=, 0
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; CHECK: i32.const $push[[L2:[0-9]+]]=, 0
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; CHECK: call callee_with_nonlegal_fixed, $pop[[L0]], $pop[[L1]], $pop[[L2]]{{$}}
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define void @call_nonlegal_fixed() nounwind {
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call void (fp128, ...) @callee_with_nonlegal_fixed(fp128 0xL00000000000000000000000000000000)
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ret void
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}
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; Test a definition a varargs function with a non-legal fixed argument.
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; CHECK-LABEL: nonlegal_fixed:
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; CHECK-NEXT: .functype nonlegal_fixed (i64, i64, i32) -> (){{$}}
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define void @nonlegal_fixed(fp128 %x, ...) nounwind {
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ret void
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}
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; Test that an fp128 argument is properly aligned and allocated
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; within a vararg buffer.
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; CHECK-LABEL: call_fp128_alignment:
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; CHECK: global.get $push7=, __stack_pointer
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; CHECK-NEXT: i32.const $push8=, 32
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; CHECK-NEXT: i32.sub $push12=, $pop7, $pop8
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; CHECK-NEXT: local.tee $push11=, $1=, $pop12
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; CHECK-NEXT: global.set __stack_pointer, $pop11
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; CHECK-NEXT: i32.const $push0=, 24
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; CHECK-NEXT: i32.add $push1=, $1, $pop0
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; CHECK-NEXT: i64.const $push2=, -9223372036854775808
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; CHECK-NEXT: i64.store 0($pop1), $pop2
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; CHECK-NEXT: i32.const $push3=, 16
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; CHECK-NEXT: i32.add $push4=, $1, $pop3
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; CHECK-NEXT: i64.const $push5=, 1
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; CHECK-NEXT: i64.store 0($pop4), $pop5
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; CHECK-NEXT: i32.const $push6=, 7
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; CHECK-NEXT: i32.store 0($1), $pop6
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; CHECK-NEXT: call callee, $1
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define void @call_fp128_alignment(i8* %p) {
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entry:
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call void (...) @callee(i8 7, fp128 0xL00000000000000018000000000000000)
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ret void
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}
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declare void @llvm.va_start(i8*)
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declare void @llvm.va_end(i8*)
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declare void @llvm.va_copy(i8*, i8*)
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