| Andrew Trick | b1eede1 | 2011-08-10 00:28:10 +0000 | [diff] [blame] | 1 | ; RUN: opt -S < %s -instcombine -inline -jump-threading -loop-unroll -unroll-count=4 | FileCheck %s |
| 2 | ; |
| 3 | ; This is a test case that required a number of setup passes because |
| 4 | ; it depends on block order. |
| 5 | |
| 6 | target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" |
| 7 | target triple = "x86_64-apple-macosx10.6.8" |
| 8 | |
| 9 | declare i1 @check() nounwind |
| 10 | declare i32 @getval() nounwind |
| 11 | |
| 12 | ; Check that the loop exit merges values from all the iterations. This |
| 13 | ; could be a tad fragile, but it's a good test. |
| 14 | ; |
| 15 | ; CHECK: @foo |
| 16 | ; CHECK: return: |
| 17 | ; CHECK: %retval.0 = phi i32 [ %tmp7.i, %land.lhs.true ], [ 0, %do.cond ], [ %tmp7.i.1, %land.lhs.true.1 ], [ 0, %do.cond.1 ], [ %tmp7.i.2, %land.lhs.true.2 ], [ 0, %do.cond.2 ], [ %tmp7.i.3, %land.lhs.true.3 ], [ 0, %do.cond.3 ] |
| 18 | ; CHECK-NOT: @bar |
| 19 | ; CHECK: bar.exit.3 |
| 20 | define i32 @foo() uwtable ssp align 2 { |
| 21 | entry: |
| 22 | br i1 undef, label %return, label %if.end |
| 23 | |
| 24 | if.end: ; preds = %entry |
| 25 | %call2 = call i32 @getval() |
| 26 | br label %do.body |
| 27 | |
| 28 | do.body: ; preds = %do.cond, %if.end |
| 29 | %call6 = call i32 @bar() |
| 30 | %cmp = icmp ne i32 %call6, 0 |
| 31 | br i1 %cmp, label %land.lhs.true, label %do.cond |
| 32 | |
| 33 | land.lhs.true: ; preds = %do.body |
| 34 | %call10 = call i32 @getval() |
| 35 | %cmp11 = icmp eq i32 0, %call10 |
| 36 | br i1 %cmp11, label %return, label %do.cond |
| 37 | |
| 38 | do.cond: ; preds = %land.lhs.true, %do.body |
| 39 | %cmp18 = icmp sle i32 0, %call2 |
| 40 | br i1 %cmp18, label %do.body, label %return |
| 41 | |
| 42 | return: ; preds = %do.cond, %land.lhs.true, %entry |
| 43 | %retval.0 = phi i32 [ 0, %entry ], [ %call6, %land.lhs.true ], [ 0, %do.cond ] |
| 44 | ret i32 %retval.0 |
| 45 | } |
| 46 | |
| 47 | define linkonce_odr i32 @bar() nounwind uwtable ssp align 2 { |
| 48 | entry: |
| 49 | br i1 undef, label %land.lhs.true, label %cond.end |
| 50 | |
| 51 | land.lhs.true: ; preds = %entry |
| 52 | %cmp4 = call zeroext i1 @check() |
| 53 | br i1 %cmp4, label %cond.true, label %cond.end |
| 54 | |
| 55 | cond.true: ; preds = %land.lhs.true |
| 56 | %tmp7 = call i32 @getval() |
| 57 | br label %cond.end |
| 58 | |
| 59 | cond.end: ; preds = %cond.true, %land.lhs.true, %entry |
| 60 | %cond = phi i32 [ %tmp7, %cond.true ], [ 0, %land.lhs.true ], [ 0, %entry ] |
| 61 | ret i32 %cond |
| 62 | } |