| ; RUN: opt < %s -basicaa -gvn -enable-load-pre -S | FileCheck %s |
| ; RUN: opt < %s -aa-pipeline=basic-aa -passes=gvn -enable-load-pre -S | FileCheck %s |
| |
| target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128" |
| target triple = "aarch64--linux-gnu" |
| |
| define double @foo(i32 %stat, i32 %i, double** %p) { |
| ; CHECK-LABEL: @foo( |
| entry: |
| switch i32 %stat, label %sw.default [ |
| i32 0, label %sw.bb |
| i32 1, label %sw.bb |
| i32 2, label %sw.bb2 |
| ] |
| |
| sw.bb: ; preds = %entry, %entry |
| %idxprom = sext i32 %i to i64 |
| %arrayidx = getelementptr inbounds double*, double** %p, i64 0 |
| %0 = load double*, double** %arrayidx, align 8 |
| %arrayidx1 = getelementptr inbounds double, double* %0, i64 %idxprom |
| %1 = load double, double* %arrayidx1, align 8 |
| %sub = fsub double %1, 1.000000e+00 |
| %cmp = fcmp olt double %sub, 0.000000e+00 |
| br i1 %cmp, label %if.then, label %if.end |
| |
| if.then: ; preds = %sw.bb |
| br label %return |
| |
| if.end: ; preds = %sw.bb |
| br label %sw.bb2 |
| |
| sw.bb2: ; preds = %if.end, %entry |
| %idxprom3 = sext i32 %i to i64 |
| %arrayidx4 = getelementptr inbounds double*, double** %p, i64 0 |
| %2 = load double*, double** %arrayidx4, align 8 |
| %arrayidx5 = getelementptr inbounds double, double* %2, i64 %idxprom3 |
| %3 = load double, double* %arrayidx5, align 8 |
| ; CHECK: sw.bb2: |
| ; CHECK-NOT: sext |
| ; CHECK: phi double [ |
| ; CHECK-NOT: load |
| %sub6 = fsub double 3.000000e+00, %3 |
| br label %return |
| |
| sw.default: ; preds = %entry |
| br label %return |
| |
| return: ; preds = %sw.default, %sw.bb2, %if.then |
| %retval.0 = phi double [ 0.000000e+00, %sw.default ], [ %sub6, %sw.bb2 ], [ %sub, %if.then ] |
| ret double %retval.0 |
| } |
| |
| ; The load causes the GEP's operands to be PREd earlier than normal. The |
| ; resulting sext ends up in pre.dest and in the GVN system before that BB is |
| ; actually processed. Make sure we can deal with the situation. |
| |
| define void @test_shortcut_safe(i1 %tst, i32 %p1, i32* %a) { |
| ; CHECK-LABEL: define void @test_shortcut_safe |
| ; CHECK: [[SEXT1:%.*]] = sext i32 %p1 to i64 |
| ; CHECK: [[PHI1:%.*]] = phi i64 [ [[SEXT1]], {{%.*}} ], [ [[PHI2:%.*]], {{%.*}} ] |
| ; CHECK: [[SEXT2:%.*]] = sext i32 %p1 to i64 |
| ; CHECK: [[PHI2]] = phi i64 [ [[SEXT2]], {{.*}} ], [ [[PHI1]], {{%.*}} ] |
| ; CHECK: getelementptr inbounds i32, i32* %a, i64 [[PHI2]] |
| |
| br i1 %tst, label %sext1, label %pre.dest |
| |
| pre.dest: |
| br label %sext.use |
| |
| sext1: |
| %idxprom = sext i32 %p1 to i64 |
| br label %sext.use |
| |
| sext.use: |
| %idxprom2 = sext i32 %p1 to i64 |
| %arrayidx3 = getelementptr inbounds i32, i32* %a, i64 %idxprom2 |
| %val = load i32, i32* %arrayidx3, align 4 |
| tail call void (i32) @g(i32 %val) |
| br label %pre.dest |
| } |
| |
| declare void @g(i32) |
