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Cherry Zhang authored
Machine supports (or the runtime simulates in soft float mode) (u)int32<->float conversions. The frontend rewrites int64<->float conversions to call to runtime function. For int64->float32 conversion, the frontend generates . . AS u(100) l(10) tc(1) . . . NAME-main.~r1 u(1) a(true) g(1) l(9) x(8+0) class(PPARAMOUT) f(1) float32 . . . CALLFUNC u(100) l(10) tc(1) float32 . . . . NAME-runtime.int64tofloat64 u(1) a(true) x(0+0) class(PFUNC) tc(1) used(true) FUNC-func(int64) float64 The CALLFUNC node has type float32, whereas runtime.int64tofloat64 returns float64. The legacy backend implicitly makes a float64->float32 conversion. The SSA backend does not do implicit conversion, so we insert an explicit CONV here. All cmd/compile/internal/gc/testdata/*_ssa.go tests passed. Progress on SSA for ARM. Still not complete. Update #15365. Change-Id: I30937c8ff977271246b068f48224693776804339 Reviewed-on: https://go-review.googlesource.com/23652Reviewed-by: Keith Randall <khr@golang.org>
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