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author | Abdoulaye Walsimou Gaye <awg@embtoolkit.org> | 2013-05-15 21:43:59 +0200 |
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committer | Abdoulaye Walsimou Gaye <awg@embtoolkit.org> | 2013-05-15 21:43:59 +0200 |
commit | b2e3c7da703d4c3dda41d4f1e18cd976e6c4381a (patch) | |
tree | 7462cd2988228ae24c40b37a9382d35874bbf099 /test/CodeGen/Hexagon/BranchPredict.ll | |
parent | 23d8d191eff180ba312a4d1b4fec8597e5a988d5 (diff) | |
parent | 4ef61f2ad4ff509ee05c7051d359009511f81226 (diff) | |
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Merge branch 'master' into embtk-support-masterembtk-support-master
Diffstat (limited to 'test/CodeGen/Hexagon/BranchPredict.ll')
-rw-r--r-- | test/CodeGen/Hexagon/BranchPredict.ll | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/test/CodeGen/Hexagon/BranchPredict.ll b/test/CodeGen/Hexagon/BranchPredict.ll new file mode 100644 index 0000000000..716e85da5a --- /dev/null +++ b/test/CodeGen/Hexagon/BranchPredict.ll @@ -0,0 +1,79 @@ +; RUN: llc -march=hexagon -mcpu=hexagonv4 < %s | FileCheck %s + +; Check if the branch probabilities are reflected in the instructions: +; The basic block placement pass should place the more probable successor +; block as the fall-through block. The unconditional jump in the predecessor +; should then get the right hint (not_taken or ":nt") + + +@j = external global i32 + +define i32 @foo(i32 %a) nounwind { +; CHECK: if{{ *}}(!p{{[0-3]}}.new) jump:nt +entry: + %tobool = icmp eq i32 %a, 0 + br i1 %tobool, label %if.else, label %if.then, !prof !0 + +if.then: ; preds = %entry + %add = add nsw i32 %a, 10 + %call = tail call i32 bitcast (i32 (...)* @foobar to i32 (i32)*)(i32 %add) nounwind + br label %return + +if.else: ; preds = %entry + %call2 = tail call i32 bitcast (i32 (...)* @foobar to i32 (i32)*)(i32 4) nounwind + br label %return + +return: ; preds = %if.else, %if.then + %retval.0 = phi i32 [ %call, %if.then ], [ %call2, %if.else ] + ret i32 %retval.0 +} + +declare i32 @foobar(...) + +define i32 @bar(i32 %a) nounwind { +; CHECK: if{{ *}}(p{{[0-3]}}.new) jump:nt +entry: + %tobool = icmp eq i32 %a, 0 + br i1 %tobool, label %if.else, label %if.then, !prof !1 + +if.then: ; preds = %entry + %add = add nsw i32 %a, 10 + %call = tail call i32 bitcast (i32 (...)* @foobar to i32 (i32)*)(i32 %add) nounwind + br label %return + +if.else: ; preds = %entry + %call2 = tail call i32 bitcast (i32 (...)* @foobar to i32 (i32)*)(i32 4) nounwind + br label %return + +return: ; preds = %if.else, %if.then + %retval.0 = phi i32 [ %call, %if.then ], [ %call2, %if.else ] + ret i32 %retval.0 +} + +define i32 @foo_bar(i32 %a, i16 signext %b) nounwind { +; CHECK: if{{ *}}(!cmp.eq(r{{[0-9]*}}.new, #0)) jump:nt +entry: + %0 = load i32* @j, align 4, !tbaa !2 + %tobool = icmp eq i32 %0, 0 + br i1 %tobool, label %if.else, label %if.then, !prof !0 + +if.then: ; preds = %entry + %add = add nsw i32 %a, 10 + %call = tail call i32 bitcast (i32 (...)* @foobar to i32 (i32)*)(i32 %add) nounwind + br label %return + +if.else: ; preds = %entry + %add1 = add nsw i32 %a, 4 + %call2 = tail call i32 bitcast (i32 (...)* @foobar to i32 (i32)*)(i32 %add1) nounwind + br label %return + +return: ; preds = %if.else, %if.then + %retval.0 = phi i32 [ %call, %if.then ], [ %call2, %if.else ] + ret i32 %retval.0 +} + +!0 = metadata !{metadata !"branch_weights", i32 64, i32 4} +!1 = metadata !{metadata !"branch_weights", i32 4, i32 64} +!2 = metadata !{metadata !"int", metadata !3} +!3 = metadata !{metadata !"omnipotent char", metadata !4} +!4 = metadata !{metadata !"Simple C/C++ TBAA"} |