| ; RUN: opt < %s -jump-threading -S | FileCheck %s |
| ; rdar://6402033 |
| |
| ; Test that we can thread through the block with the partially redundant load (%2). |
| target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" |
| target triple = "i386-apple-darwin7" |
| |
| define i32 @foo(i32* %P) nounwind { |
| ; CHECK: foo |
| entry: |
| %0 = tail call i32 (...)* @f1() nounwind ; <i32> [#uses=1] |
| %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] |
| br i1 %1, label %bb1, label %bb |
| |
| bb: ; preds = %entry |
| ; CHECK: bb1.thread: |
| ; CHECK: store |
| ; CHECK: br label %bb3 |
| store i32 42, i32* %P, align 4 |
| br label %bb1 |
| |
| bb1: ; preds = %entry, %bb |
| %res.0 = phi i32 [ 1, %bb ], [ 0, %entry ] ; <i32> [#uses=2] |
| %2 = load i32* %P, align 4 ; <i32> [#uses=1] |
| %3 = icmp sgt i32 %2, 36 ; <i1> [#uses=1] |
| br i1 %3, label %bb3, label %bb2 |
| |
| bb2: ; preds = %bb1 |
| %4 = tail call i32 (...)* @f2() nounwind ; <i32> [#uses=0] |
| ret i32 %res.0 |
| |
| bb3: ; preds = %bb1 |
| ; CHECK: bb3: |
| ; CHECK: %res.01 = phi i32 [ 1, %bb1.thread ], [ 0, %bb1 ] |
| ; CHECK: ret i32 %res.01 |
| ret i32 %res.0 |
| } |
| |
| declare i32 @f1(...) |
| |
| declare i32 @f2(...) |
