mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-21 03:53:04 +02:00
d43cc9f5ac
This pass implements a simple algorithm for conversion from CFG to wasm's structured control flow. It doesn't yet handle multiple-entry loops; that will be added in a future patch. It also adds initial support for switch statements. Differential Revision: http://reviews.llvm.org/D12735 llvm-svn: 247818
49 lines
1.0 KiB
LLVM
49 lines
1.0 KiB
LLVM
; RUN: llc < %s -asm-verbose=false | FileCheck %s
|
|
|
|
; Test that phis are lowered.
|
|
|
|
target datalayout = "e-p:32:32-i64:64-n32:64-S128"
|
|
target triple = "wasm32-unknown-unknown"
|
|
|
|
; Basic phi triangle.
|
|
|
|
; CHECK-LABEL: test0
|
|
; CHECK: (setlocal [[REG:@.*]] (argument 0))
|
|
; CHECK: (setlocal [[REG]] (sdiv [[REG]] {{.*}}))
|
|
; CHECK: (return [[REG]])
|
|
define i32 @test0(i32 %p) {
|
|
entry:
|
|
%t = icmp slt i32 %p, 0
|
|
br i1 %t, label %true, label %done
|
|
true:
|
|
%a = sdiv i32 %p, 3
|
|
br label %done
|
|
done:
|
|
%s = phi i32 [ %a, %true ], [ %p, %entry ]
|
|
ret i32 %s
|
|
}
|
|
|
|
; Swap phis.
|
|
|
|
; CHECK-LABEL: test1
|
|
; CHECK: BB1_1:
|
|
; CHECK: (setlocal [[REG0:@.*]] [[REG1:@.*]])
|
|
; CHECK: (setlocal [[REG1]] [[REG2:@.*]])
|
|
; CHECK: (setlocal [[REG2]] [[REG0]])
|
|
define i32 @test1(i32 %n) {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%a = phi i32 [ 0, %entry ], [ %b, %loop ]
|
|
%b = phi i32 [ 1, %entry ], [ %a, %loop ]
|
|
%i = phi i32 [ 0, %entry ], [ %i.next, %loop ]
|
|
|
|
%i.next = add i32 %i, 1
|
|
%t = icmp slt i32 %i.next, %n
|
|
br i1 %t, label %loop, label %exit
|
|
|
|
exit:
|
|
ret i32 %a
|
|
}
|