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| author | Ayke van Laethem <[email protected]> | 2021-04-05 22:29:53 +0200 |
|---|---|---|
| committer | Ron Evans <[email protected]> | 2021-04-08 11:40:59 +0200 |
| commit | 04d12bf2ba85358534d67a4cbe3402a1f25b7437 (patch) | |
| tree | 3d1d80eaee75aac4686bde332bf8e379fe1a9cf4 /interp/compiler.go | |
| parent | 0b7957d61249ce4b745f78405e36f07245eb8da3 (diff) | |
| download | tinygo-04d12bf2ba85358534d67a4cbe3402a1f25b7437.tar.gz tinygo-04d12bf2ba85358534d67a4cbe3402a1f25b7437.zip | |
interp: add support for switch statement
A switch statement is not normally emitted by the compiler package, but
LLVM function passes may convert a series of if/else pairs to a switch
statement. A future change will run function passes in the package
compile phase, so the interp package (which is also run after all
modules are merged together) will need to deal with these new switch
statements.
Diffstat (limited to 'interp/compiler.go')
| -rw-r--r-- | interp/compiler.go | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/interp/compiler.go b/interp/compiler.go index e45df8c13..e9bf36c3e 100644 --- a/interp/compiler.go +++ b/interp/compiler.go @@ -135,6 +135,15 @@ func (r *runner) compileFunction(llvmFn llvm.Value) *function { default: panic("unknown number of operands") } + case llvm.Switch: + // A switch is an array of (value, label) pairs, of which the + // first one indicates the to-switch value and the default + // label. + numOperands := llvmInst.OperandsCount() + for i := 0; i < numOperands; i += 2 { + inst.operands = append(inst.operands, r.getValue(llvmInst.Operand(i))) + inst.operands = append(inst.operands, literalValue{uint32(blockIndices[llvmInst.Operand(i+1)])}) + } case llvm.PHI: inst.name = llvmInst.Name() incomingCount := inst.llvmInst.IncomingCount() |