| Simon Dardis | 8d8f2f8 | 2016-05-17 10:21:43 +0000 | [diff] [blame] | 1 | ; Check that -mips-compact-branches={never,optimal,always} is accepted and honoured. |
| 2 | ; RUN: llc -march=mips -mcpu=mips32r6 -mips-compact-branches=never < %s | FileCheck %s -check-prefix=NEVER |
| 3 | ; RUN: llc -march=mips -mcpu=mips32r6 -mips-compact-branches=optimal < %s | FileCheck %s -check-prefix=OPTIMAL |
| 4 | ; RUN: llc -march=mips -mcpu=mips32r6 -mips-compact-branches=always < %s | FileCheck %s -check-prefix=ALWAYS |
| 5 | |
| 6 | define i32 @l(i32 signext %a, i32 signext %b) { |
| 7 | entry: |
| 8 | %add = add nsw i32 %b, %a |
| 9 | %cmp = icmp slt i32 %add, 100 |
| 10 | ; NEVER: beq |
| 11 | ; OPTIMAL: beq |
| 12 | ; ALWAYS: beqzc |
| 13 | ; This nop is required for correct as having (j|b)al as the instruction |
| 14 | ; immediately following beqzc would cause a forbidden slot hazard. |
| 15 | ; ALWAYS: nop |
| 16 | br i1 %cmp, label %if.then, label %if.end |
| 17 | |
| 18 | if.then: ; preds = %entry |
| 19 | %call = tail call i32 @k() |
| 20 | br label %if.end |
| 21 | |
| 22 | if.end: ; preds = %entry, %if.then |
| 23 | %call.pn = phi i32 [ %call, %if.then ], [ -1, %entry ] |
| 24 | %c.0 = add nsw i32 %call.pn, %add |
| 25 | ret i32 %c.0 |
| 26 | } |
| 27 | |
| 28 | declare i32 @k() #1 |