diff options
Diffstat (limited to 'test/codegen/switch.go')
| -rw-r--r-- | test/codegen/switch.go | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/test/codegen/switch.go b/test/codegen/switch.go index d59ef4f2eb..07850522ab 100644 --- a/test/codegen/switch.go +++ b/test/codegen/switch.go @@ -21,13 +21,41 @@ func f(x string) int { } } -// use jump tables for 8+ int cases -func square(x int) int { +// use jump tables for 8+ string cases +// Using multiple return values prevent lookup tables. +func squareJump(x int) (int, int) { // amd64:`JMP \(.*\)\(.*\)$` // arm64:`MOVD \(R.*\)\(R.*<<3\)` `JMP \(R.*\)$` // loong64: `ALSLV` `MOVV` `JMP` switch x { case 1: + return 1, 1 + case 2: + return 4, 2 + case 3: + return 9, 3 + case 4: + return 16, 4 + case 5: + return 25, 5 + case 6: + return 36, 6 + case 7: + return 49, 7 + case 8: + return 64, 8 + default: + return x * x, x + } +} + +// use lookup tables for 8+ int cases returning constants +func squareLookup(x int) int { + // amd64:`LEAQ .*\(SB\)` `MOVQ .*\(.*\)\(.*\*8\)` -`JMP \(.*\)\(.*\)$` + // arm64:`MOVD \(R.*\)\(R.*<<3\)` -`JMP \(R.*\)$` + // loong64:`SLLV` `MOVV \(R.*\)\(R.*\)` -`ALSLV` + switch x { + case 1: return 1 case 2: return 4 |