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00a99a3584
only run for x86 with fastisel. I've found it being very effective in eliminating some obvious dead code as result of formal parameter lowering especially when tail call optimization eliminated the need for some of the loads from fixed frame objects. It also shrinks a number of the tests. A couple of tests no longer make sense and are now eliminated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95493 91177308-0d34-0410-b5e6-96231b3b80d8
44 lines
1.9 KiB
LLVM
44 lines
1.9 KiB
LLVM
; RUN: llc < %s -march=x86 -stats |& grep {codegen-dce} | grep {Number of dead instructions deleted}
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%struct.anon = type { [3 x double], double, %struct.node*, [64 x %struct.bnode*], [64 x %struct.bnode*] }
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%struct.bnode = type { i16, double, [3 x double], i32, i32, [3 x double], [3 x double], [3 x double], double, %struct.bnode*, %struct.bnode* }
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%struct.node = type { i16, double, [3 x double], i32, i32 }
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define i32 @main(i32 %argc, i8** nocapture %argv) nounwind {
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entry:
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%0 = malloc %struct.anon ; <%struct.anon*> [#uses=2]
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%1 = getelementptr %struct.anon* %0, i32 0, i32 2 ; <%struct.node**> [#uses=1]
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br label %bb14.i
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bb14.i: ; preds = %bb14.i, %entry
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%i8.0.reg2mem.0.i = phi i32 [ 0, %entry ], [ %2, %bb14.i ] ; <i32> [#uses=1]
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%2 = add i32 %i8.0.reg2mem.0.i, 1 ; <i32> [#uses=2]
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%exitcond74.i = icmp eq i32 %2, 32 ; <i1> [#uses=1]
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br i1 %exitcond74.i, label %bb32.i, label %bb14.i
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bb32.i: ; preds = %bb32.i, %bb14.i
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%tmp.0.reg2mem.0.i = phi i32 [ %indvar.next63.i, %bb32.i ], [ 0, %bb14.i ] ; <i32> [#uses=1]
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%indvar.next63.i = add i32 %tmp.0.reg2mem.0.i, 1 ; <i32> [#uses=2]
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%exitcond64.i = icmp eq i32 %indvar.next63.i, 64 ; <i1> [#uses=1]
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br i1 %exitcond64.i, label %bb47.loopexit.i, label %bb32.i
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bb.i.i: ; preds = %bb47.loopexit.i
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unreachable
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stepsystem.exit.i: ; preds = %bb47.loopexit.i
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store %struct.node* null, %struct.node** %1, align 4
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br label %bb.i6.i
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bb.i6.i: ; preds = %bb.i6.i, %stepsystem.exit.i
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br i1 false, label %bb107.i.i, label %bb.i6.i
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bb107.i.i: ; preds = %bb107.i.i, %bb.i6.i
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%q_addr.0.i.i.in = phi %struct.bnode** [ null, %bb107.i.i ], [ %3, %bb.i6.i ] ; <%struct.bnode**> [#uses=0]
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br label %bb107.i.i
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bb47.loopexit.i: ; preds = %bb32.i
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%3 = getelementptr %struct.anon* %0, i32 0, i32 4, i32 0 ; <%struct.bnode**> [#uses=1]
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%4 = icmp eq %struct.node* null, null ; <i1> [#uses=1]
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br i1 %4, label %stepsystem.exit.i, label %bb.i.i
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}
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