WebAssembly: Implement call

Summary: Support function calls.

Reviewers: sunfish, sunfishcode

Subscribers: sunfishcode, jfb, llvm-commits

Differential revision: http://reviews.llvm.org/D12219

llvm-svn: 245887

1 files changed, 55 insertions, 12 deletions

diff --git a/llvm/test/CodeGen/WebAssembly/call.ll b/llvm/test/CodeGen/WebAssembly/call.ll
index e5d468b3cd1..ae66fae840c 100644
--- a/llvm/test/CodeGen/WebAssembly/call.ll
+++ b/llvm/test/CodeGen/WebAssembly/call.ll
@@ -5,18 +5,61 @@
 target datalayout = "e-p:32:32-i64:64-v128:8:128-n32:64-S128"
 target triple = "wasm32-unknown-unknown"
 
-declare void @nullary()
-
-; CHECK-LABEL: call_nullary:
-; CHECK-NEXT: (call @foo)
-; CHECK-NEXT: (return)
-define void @call_nullary() {
-  call void @nullary()
-  ret void
+declare i32 @i32_nullary()
+declare i32 @i32_unary(i32)
+declare i64 @i64_nullary()
+declare float @float_nullary()
+declare double @double_nullary()
+
+; CHECK-LABEL: call_i32_nullary:
+; CHECK-NEXT: (setlocal @0 (global $i32_nullary))
+; CHECK-NEXT: (setlocal @1 (call @0))
+; CHECK-NEXT: (return @1)
+define i32 @call_i32_nullary() {
+  %r = call i32 @i32_nullary()
+  ret i32 %r
+}
+
+; CHECK-LABEL: call_i64_nullary:
+; CHECK-NEXT: (setlocal @0 (global $i64_nullary))
+; CHECK-NEXT: (setlocal @1 (call @0))
+; CHECK-NEXT: (return @1)
+define i64 @call_i64_nullary() {
+  %r = call i64 @i64_nullary()
+  ret i64 %r
+}
+
+; CHECK-LABEL: call_float_nullary:
+; CHECK-NEXT: (setlocal @0 (global $float_nullary))
+; CHECK-NEXT: (setlocal @1 (call @0))
+; CHECK-NEXT: (return @1)
+define float @call_float_nullary() {
+  %r = call float @float_nullary()
+  ret float %r
+}
+
+; CHECK-LABEL: call_double_nullary:
+; CHECK-NEXT: (setlocal @0 (global $double_nullary))
+; CHECK-NEXT: (setlocal @1 (call @0))
+; CHECK-NEXT: (return @1)
+define double @call_double_nullary() {
+  %r = call double @double_nullary()
+  ret double %r
 }
 
+; CHECK-LABEL: call_i32_unary:
+; CHECK-NEXT: (setlocal @0 (argument 0))
+; CHECK-NEXT: (setlocal @1 (global $i32_unary))
+; CHECK-NEXT: (setlocal @2 (call @1 @0))
+; CHECK-NEXT: (return @2)
+define i32 @call_i32_unary(i32 %a) {
+  %r = call i32 @i32_unary(i32 %a)
+  ret i32 %r
+}
 
-; tail call
-; multiple args
-; interesting returns (int, float, struct, multiple)
-; vararg
+; FIXME test the following:
+;  - Functions without return.
+;  - More argument combinations.
+;  - Tail call.
+;  - Interesting returns (struct, multiple).
+;  - Vararg.