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bce4afe839
nodes. This allows it to do fairly general phi insertion if a load from a pointer global wants to be SRAd but the load is used by (recursive) phi nodes. This fixes a pessimization on ppc introduced by Load PRE. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61123 91177308-0d34-0410-b5e6-96231b3b80d8
42 lines
1.8 KiB
LLVM
42 lines
1.8 KiB
LLVM
; RUN: llvm-as < %s | opt -globalopt | llvm-dis | grep {tmp.f1 = phi i32. }
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; RUN: llvm-as < %s | opt -globalopt | llvm-dis | grep {tmp.f0 = phi i32. }
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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target triple = "i386-apple-darwin7"
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%struct.foo = type { i32, i32 }
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@X = internal global %struct.foo* null ; <%struct.foo**> [#uses=2]
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define void @bar(i32 %Size) nounwind noinline {
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entry:
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%tmp = malloc [1000000 x %struct.foo] ; <[1000000 x %struct.foo]*> [#uses=1]
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%.sub = getelementptr [1000000 x %struct.foo]* %tmp, i32 0, i32 0 ; <%struct.foo*> [#uses=1]
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store %struct.foo* %.sub, %struct.foo** @X, align 4
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ret void
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}
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define i32 @baz() nounwind readonly noinline {
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bb1.thread:
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%tmpLD1 = load %struct.foo** @X, align 4 ; <%struct.foo*> [#uses=1]
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br label %bb1
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bb1: ; preds = %bb1, %bb1.thread
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%tmp = phi %struct.foo* [%tmpLD1, %bb1.thread ], [ %tmpLD2, %bb1 ] ; <i32> [#uses=2]
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%i.0.reg2mem.0 = phi i32 [ 0, %bb1.thread ], [ %indvar.next, %bb1 ] ; <i32> [#uses=2]
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%sum.0.reg2mem.0 = phi i32 [ 0, %bb1.thread ], [ %tmp3, %bb1 ] ; <i32> [#uses=1]
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%tmp1 = getelementptr %struct.foo* %tmp, i32 %i.0.reg2mem.0, i32 0 ; <i32*> [#uses=1]
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%tmp2 = load i32* %tmp1, align 4 ; <i32> [#uses=1]
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%tmp6 = add i32 %tmp2, %sum.0.reg2mem.0 ; <i32> [#uses=2]
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%tmp4 = getelementptr %struct.foo* %tmp, i32 %i.0.reg2mem.0, i32 1 ; <i32*> [#uses=1]
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%tmp5 = load i32 * %tmp4
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%tmp3 = add i32 %tmp5, %tmp6
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%indvar.next = add i32 %i.0.reg2mem.0, 1 ; <i32> [#uses=2]
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%tmpLD2 = load %struct.foo** @X, align 4 ; <%struct.foo*> [#uses=1]
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%exitcond = icmp eq i32 %indvar.next, 1200 ; <i1> [#uses=1]
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br i1 %exitcond, label %bb2, label %bb1
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bb2: ; preds = %bb1
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ret i32 %tmp3
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}
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