forked from OSchip/llvm-project
50 lines
2.1 KiB
LLVM
50 lines
2.1 KiB
LLVM
; RUN: llc < %s -march=x86 | grep align | count 4
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; TODO: Is it a good idea to align inner loops? It's hard to know without
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; knowing what their trip counts are, or other dynamic information. For
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; now, CodeGen aligns all loops.
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@x = external global i32* ; <i32**> [#uses=1]
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define i32 @t(i32 %a, i32 %b) nounwind readonly ssp {
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entry:
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%0 = icmp eq i32 %a, 0 ; <i1> [#uses=1]
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br i1 %0, label %bb5, label %bb.nph12
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bb.nph12: ; preds = %entry
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%1 = icmp eq i32 %b, 0 ; <i1> [#uses=1]
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%2 = load i32** @x, align 8 ; <i32*> [#uses=1]
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br i1 %1, label %bb2.preheader, label %bb2.preheader.us
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bb2.preheader.us: ; preds = %bb2.bb3_crit_edge.us, %bb.nph12
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%indvar18 = phi i32 [ 0, %bb.nph12 ], [ %indvar.next19, %bb2.bb3_crit_edge.us ] ; <i32> [#uses=2]
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%sum.111.us = phi i32 [ 0, %bb.nph12 ], [ %4, %bb2.bb3_crit_edge.us ] ; <i32> [#uses=0]
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%tmp16 = mul i32 %indvar18, %a ; <i32> [#uses=1]
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br label %bb1.us
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bb1.us: ; preds = %bb1.us, %bb2.preheader.us
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%indvar = phi i32 [ 0, %bb2.preheader.us ], [ %indvar.next, %bb1.us ] ; <i32> [#uses=2]
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%tmp17 = add i32 %indvar, %tmp16 ; <i32> [#uses=1]
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%tmp. = zext i32 %tmp17 to i64 ; <i64> [#uses=1]
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%3 = getelementptr i32* %2, i64 %tmp. ; <i32*> [#uses=1]
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%4 = load i32* %3, align 4 ; <i32> [#uses=2]
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%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2]
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%exitcond = icmp eq i32 %indvar.next, %b ; <i1> [#uses=1]
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br i1 %exitcond, label %bb2.bb3_crit_edge.us, label %bb1.us
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bb2.bb3_crit_edge.us: ; preds = %bb1.us
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%indvar.next19 = add i32 %indvar18, 1 ; <i32> [#uses=2]
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%exitcond22 = icmp eq i32 %indvar.next19, %a ; <i1> [#uses=1]
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br i1 %exitcond22, label %bb5, label %bb2.preheader.us
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bb2.preheader: ; preds = %bb2.preheader, %bb.nph12
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%indvar24 = phi i32 [ %indvar.next25, %bb2.preheader ], [ 0, %bb.nph12 ] ; <i32> [#uses=1]
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%indvar.next25 = add i32 %indvar24, 1 ; <i32> [#uses=2]
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%exitcond28 = icmp eq i32 %indvar.next25, %a ; <i1> [#uses=1]
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br i1 %exitcond28, label %bb5, label %bb2.preheader
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bb5: ; preds = %bb2.preheader, %bb2.bb3_crit_edge.us, %entry
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%sum.1.lcssa = phi i32 [ 0, %entry ], [ 0, %bb2.preheader ], [ %4, %bb2.bb3_crit_edge.us ] ; <i32> [#uses=1]
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ret i32 %sum.1.lcssa
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}
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