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fe6fe553f7
The size savings are significant, and from what I can tell, both ICC and GCC do this. Differential Revision: http://reviews.llvm.org/D18573 llvm-svn: 264966
25 lines
854 B
LLVM
25 lines
854 B
LLVM
; RUN: llc < %s -mtriple=i686-apple-darwin -mattr=+sse2 -no-x86-call-frame-opt | grep mov | count 6
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%struct.quad_struct = type { i32, i32, %struct.quad_struct*, %struct.quad_struct*, %struct.quad_struct*, %struct.quad_struct*, %struct.quad_struct* }
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define i32 @perimeter(%struct.quad_struct* %tree, i32 %size) nounwind {
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entry:
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switch i32 %size, label %UnifiedReturnBlock [
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i32 2, label %bb
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i32 0, label %bb50
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]
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bb: ; preds = %entry
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%tmp31 = tail call i32 @perimeter( %struct.quad_struct* null, i32 0 ) nounwind ; <i32> [#uses=1]
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%tmp40 = tail call i32 @perimeter( %struct.quad_struct* null, i32 0 ) nounwind ; <i32> [#uses=1]
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%tmp33 = add i32 0, %tmp31 ; <i32> [#uses=1]
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%tmp42 = add i32 %tmp33, %tmp40 ; <i32> [#uses=1]
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ret i32 %tmp42
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bb50: ; preds = %entry
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ret i32 0
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UnifiedReturnBlock: ; preds = %entry
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ret i32 0
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}
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