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d39c38d2bc
Switch to MC for instruction printing. This encompasses several changes which are all interconnected: - Use the MC framework for printing almost all instructions. - AsmStrings are now live. - This introduces an indirection between LLVM vregs and WebAssembly registers, and a new pass, WebAssemblyRegNumbering, for computing a basic the mapping. This addresses some basic issues with argument registers and unused registers. - The way ARGUMENT instructions are handled no longer generates redundant get_local+set_local for every argument. This also changes the assembly syntax somewhat; most notably, MC's printing does not use sigils on label names, so those are no longer present, and push/pop now have a sigil to keep them unambiguous. The usage of set_local/get_local/$push/$pop will continue to evolve significantly. This patch is just one step of a larger change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252910 91177308-0d34-0410-b5e6-96231b3b80d8
49 lines
1.0 KiB
LLVM
49 lines
1.0 KiB
LLVM
; RUN: llc < %s -asm-verbose=false | FileCheck %s
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; Test that phis are lowered.
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target datalayout = "e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown"
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; Basic phi triangle.
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; CHECK-LABEL: test0:
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; CHECK: div_s $push, (get_local 0), (get_local 3){{$}}
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; CHECK: set_local 0, $pop
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; CHECK: return (get_local 0)
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define i32 @test0(i32 %p) {
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entry:
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%t = icmp slt i32 %p, 0
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br i1 %t, label %true, label %done
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true:
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%a = sdiv i32 %p, 3
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br label %done
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done:
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%s = phi i32 [ %a, %true ], [ %p, %entry ]
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ret i32 %s
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}
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; Swap phis.
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; CHECK-LABEL: test1:
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; CHECK: BB1_1:
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; CHECK: set_local [[REG0:.*]], (get_local [[REG1:.*]])
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; CHECK: set_local [[REG1]], (get_local [[REG2:.*]])
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; CHECK: set_local [[REG2]], (get_local [[REG0]])
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define i32 @test1(i32 %n) {
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entry:
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br label %loop
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loop:
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%a = phi i32 [ 0, %entry ], [ %b, %loop ]
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%b = phi i32 [ 1, %entry ], [ %a, %loop ]
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%i = phi i32 [ 0, %entry ], [ %i.next, %loop ]
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%i.next = add i32 %i, 1
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%t = icmp slt i32 %i.next, %n
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br i1 %t, label %loop, label %exit
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exit:
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ret i32 %a
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}
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