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26aab3499f
Under emscripten, C code can take the address of a function implemented in Javascript (which is exposed via an import in wasm). Because imports do not have linear memory address in wasm, we need to generate a thunk to be the target of the indirect call; it call the import directly. To make this possible, LLVM needs to emit the type signatures for these functions, because they may not be called directly or referred to other than where the address is taken. This uses s new .s directive (.functype) which specifies the signature. Differential Revision: http://reviews.llvm.org/D20891 Re-apply r271599 but instead of bailing with an error when a declared function has multiple returns, replace it with a pointer argument. Also add the test case I forgot to 'git add' last time around. llvm-svn: 271703
74 lines
3.1 KiB
LLVM
74 lines
3.1 KiB
LLVM
; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -verify-machineinstrs | FileCheck %s
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; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -verify-machineinstrs -fast-isel | FileCheck %s
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; ModuleID = 'test/dot_s/indirect-import.c'
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source_filename = "test/dot_s/indirect-import.c"
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32"
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%struct.big = type { float, double, i32 }
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; Function Attrs: nounwind
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; CHECK: bar:
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define hidden i32 @bar() #0 {
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entry:
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%fd = alloca float (double)*, align 4
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%vj = alloca void (i64)*, align 4
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%v = alloca void ()*, align 4
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%ijidf = alloca i32 (i64, i32, double, float)*, align 4
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%vs = alloca void (%struct.big*)*, align 4
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%s = alloca void (%struct.big*)*, align 4
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; CHECK: i32.const {{.+}}=, extern_fd@FUNCTION
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store float (double)* @extern_fd, float (double)** %fd, align 4
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; CHECK: i32.const {{.+}}=, extern_vj@FUNCTION
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store void (i64)* @extern_vj, void (i64)** %vj, align 4
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%0 = load void (i64)*, void (i64)** %vj, align 4
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call void %0(i64 1)
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; CHECK: i32.const {{.+}}=, extern_v@FUNCTION
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store void ()* @extern_v, void ()** %v, align 4
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%1 = load void ()*, void ()** %v, align 4
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call void %1()
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; CHECK: i32.const {{.+}}=, extern_ijidf@FUNCTION
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store i32 (i64, i32, double, float)* @extern_ijidf, i32 (i64, i32, double, float)** %ijidf, align 4
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%2 = load i32 (i64, i32, double, float)*, i32 (i64, i32, double, float)** %ijidf, align 4
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%call = call i32 %2(i64 1, i32 2, double 3.000000e+00, float 4.000000e+00)
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; CHECK: i32.const {{.+}}=, extern_struct@FUNCTION
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store void (%struct.big*)* @extern_struct, void (%struct.big*)** %vs, align 4
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; CHECK: i32.const {{.+}}=, extern_sret@FUNCTION
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store void (%struct.big*)* @extern_sret, void (%struct.big*)** %s, align 4
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%3 = load float (double)*, float (double)** %fd, align 4
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%4 = ptrtoint float (double)* %3 to i32
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ret i32 %4
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}
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declare float @extern_fd(double) #1
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declare void @extern_vj(i64) #1
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declare void @extern_v() #1
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declare i32 @extern_ijidf(i64, i32, double, float) #1
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declare void @extern_struct(%struct.big* byval align 8) #1
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declare void @extern_sret(%struct.big* sret) #1
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declare i128 @extern_i128ret(i64) #1
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attributes #0 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "unsafe-fp-math"="false" "use-soft-float"="false" }
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; CHECK: .functype extern_fd, f32, f64
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; CHECK: .functype extern_vj, void, i64
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; CHECK: .functype extern_v, void
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; CHECK: .functype extern_ijidf, i32, i64, i32, f64, f32
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; CHECK: .functype extern_struct, void, i32
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; CHECK: .functype extern_sret, void, i32
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; CHECK: .functype extern_i128ret, void, i32, i64
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