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Diffstat (limited to 'test/Transforms/InstMerge/ld_hoist1.ll')
-rw-r--r-- | test/Transforms/InstMerge/ld_hoist1.ll | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/test/Transforms/InstMerge/ld_hoist1.ll b/test/Transforms/InstMerge/ld_hoist1.ll new file mode 100644 index 0000000..715f1b8 --- /dev/null +++ b/test/Transforms/InstMerge/ld_hoist1.ll @@ -0,0 +1,64 @@ +; Test load hoist +; RUN: opt -basicaa -memdep -mldst-motion -S < %s | FileCheck %s +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" +target triple = "x86_64-pc_linux" + +; Function Attrs: nounwind uwtable +define float* @foo(i32* noalias nocapture readonly %in, float* noalias %out, i32 %size, i32* nocapture readonly %trigger) { +entry: + %cmp11 = icmp eq i32 %size, 0 + br i1 %cmp11, label %for.end, label %for.body.lr.ph + +for.body.lr.ph: ; preds = %entry + %0 = add i32 %size, -1 + br label %for.body + +; CHECK-LABEL: for.body +; CHECK: load +; CHECK: %2 = getelementptr inbounds i32* %in, i64 %indvars.iv +; CHECK: %3 = load i32* %2, align 4 + +for.body: ; preds = %for.body.lr.ph, %for.inc + %indvars.iv = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next, %for.inc ] + %arrayidx = getelementptr inbounds i32* %trigger, i64 %indvars.iv + %1 = load i32* %arrayidx, align 4 + %cmp1 = icmp sgt i32 %1, 0 + br i1 %cmp1, label %if.then, label %if.else + +; CHECK-LABEL: if.then +if.then: ; preds = %for.body +; This load should be hoisted + %arrayidx3 = getelementptr inbounds i32* %in, i64 %indvars.iv + %2 = load i32* %arrayidx3, align 4 + %conv = sitofp i32 %2 to float + %add = fadd float %conv, 5.000000e-01 + %arrayidx5 = getelementptr inbounds float* %out, i64 %indvars.iv + store float %add, float* %arrayidx5, align 4 + br label %for.inc + +if.else: ; preds = %for.body + %arrayidx7 = getelementptr inbounds float* %out, i64 %indvars.iv + %3 = load float* %arrayidx7, align 4 + %div = fdiv float %3, 3.000000e+00 + store float %div, float* %arrayidx7, align 4 +; This load should be hoisted in spite of store + %arrayidx9 = getelementptr inbounds i32* %in, i64 %indvars.iv + %4 = load i32* %arrayidx9, align 4 + %conv10 = sitofp i32 %4 to float + %add13 = fadd float %div, %conv10 + store float %add13, float* %arrayidx7, align 4 + br label %for.inc + +for.inc: ; preds = %if.then, %if.else + %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 + %lftr.wideiv = trunc i64 %indvars.iv to i32 + %exitcond = icmp ne i32 %lftr.wideiv, %0 + br i1 %exitcond, label %for.body, label %for.cond.for.end_crit_edge + +for.cond.for.end_crit_edge: ; preds = %for.inc + br label %for.end + +for.end: ; preds = %entry, %for.cond.for.end_crit_edge + ret float* %out +} + |