| ; RUN: opt -S < %s -instcombine -inline -jump-threading -loop-unroll -unroll-count=4 | FileCheck %s |
| ; |
| ; This is a test case that required a number of setup passes because |
| ; it depends on block order. |
| |
| 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" |
| target triple = "x86_64-apple-macosx10.6.8" |
| |
| declare i1 @check() nounwind |
| declare i32 @getval() nounwind |
| |
| ; Check that the loop exit merges values from all the iterations. This |
| ; could be a tad fragile, but it's a good test. |
| ; |
| ; CHECK-LABEL: @foo( |
| ; CHECK: return: |
| ; 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 ] |
| ; CHECK-NOT: @bar( |
| ; CHECK: bar.exit.3 |
| define i32 @foo() uwtable ssp align 2 { |
| entry: |
| br i1 undef, label %return, label %if.end |
| |
| if.end: ; preds = %entry |
| %call2 = call i32 @getval() |
| br label %do.body |
| |
| do.body: ; preds = %do.cond, %if.end |
| %call6 = call i32 @bar() |
| %cmp = icmp ne i32 %call6, 0 |
| br i1 %cmp, label %land.lhs.true, label %do.cond |
| |
| land.lhs.true: ; preds = %do.body |
| %call10 = call i32 @getval() |
| %cmp11 = icmp eq i32 0, %call10 |
| br i1 %cmp11, label %return, label %do.cond |
| |
| do.cond: ; preds = %land.lhs.true, %do.body |
| %cmp18 = icmp sle i32 0, %call2 |
| br i1 %cmp18, label %do.body, label %return |
| |
| return: ; preds = %do.cond, %land.lhs.true, %entry |
| %retval.0 = phi i32 [ 0, %entry ], [ %call6, %land.lhs.true ], [ 0, %do.cond ] |
| ret i32 %retval.0 |
| } |
| |
| define linkonce_odr i32 @bar() nounwind uwtable ssp align 2 { |
| entry: |
| br i1 undef, label %land.lhs.true, label %cond.end |
| |
| land.lhs.true: ; preds = %entry |
| %cmp4 = call zeroext i1 @check() |
| br i1 %cmp4, label %cond.true, label %cond.end |
| |
| cond.true: ; preds = %land.lhs.true |
| %tmp7 = call i32 @getval() |
| br label %cond.end |
| |
| cond.end: ; preds = %cond.true, %land.lhs.true, %entry |
| %cond = phi i32 [ %tmp7, %cond.true ], [ 0, %land.lhs.true ], [ 0, %entry ] |
| ret i32 %cond |
| } |
