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| author | Evan Cheng <evan.cheng@apple.com> | 2007-12-01 02:07:52 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2007-12-01 02:07:52 +0000 |
| commit | e62f97c094dba44e4c259d20135167fa91912eea (patch) | |
| tree | 5d910203fd66c0b5594d9f29a069ae8125283566 /test/CodeGen/X86/2007-11-30-TestLoadFolding.ll | |
| parent | 790e11cdff59ed6312c2f1d3d8f63537c2ae2ec5 (diff) | |
| download | external_llvm-e62f97c094dba44e4c259d20135167fa91912eea.zip external_llvm-e62f97c094dba44e4c259d20135167fa91912eea.tar.gz external_llvm-e62f97c094dba44e4c259d20135167fa91912eea.tar.bz2 | |
Allow some reloads to be folded in multi-use cases. Specifically testl r, r -> cmpl [mem], 0.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44479 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/2007-11-30-TestLoadFolding.ll')
| -rw-r--r-- | test/CodeGen/X86/2007-11-30-TestLoadFolding.ll | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2007-11-30-TestLoadFolding.ll b/test/CodeGen/X86/2007-11-30-TestLoadFolding.ll new file mode 100644 index 0000000..25fc6ac --- /dev/null +++ b/test/CodeGen/X86/2007-11-30-TestLoadFolding.ll @@ -0,0 +1,58 @@ +; RUN: llvm-as < %s | llc -march=x86 -stats |& \ +; RUN: grep {2 .*folded into instructions} +; RUN: llvm-as < %s | llc -march=x86 | grep cmp | count 3 + + %struct.quad_struct = type { i32, i32, %struct.quad_struct*, %struct.quad_struct*, %struct.quad_struct*, %struct.quad_struct*, %struct.quad_struct* } + +define fastcc i32 @perimeter(%struct.quad_struct* %tree, i32 %size) { +entry: + %tree.idx7.val = load %struct.quad_struct** null ; <%struct.quad_struct*> [#uses=1] + %tmp8.i51 = icmp eq %struct.quad_struct* %tree.idx7.val, null ; <i1> [#uses=2] + br i1 %tmp8.i51, label %cond_next, label %cond_next.i52 + +cond_next.i52: ; preds = %entry + ret i32 0 + +cond_next: ; preds = %entry + %tmp59 = load i32* null, align 4 ; <i32> [#uses=1] + %tmp70 = icmp eq i32 %tmp59, 2 ; <i1> [#uses=1] + br i1 %tmp70, label %cond_true.i35, label %bb80 + +cond_true.i35: ; preds = %cond_next + %tmp14.i.i37 = load %struct.quad_struct** null, align 4 ; <%struct.quad_struct*> [#uses=1] + %tmp3.i160 = load i32* null, align 4 ; <i32> [#uses=1] + %tmp4.i161 = icmp eq i32 %tmp3.i160, 2 ; <i1> [#uses=1] + br i1 %tmp4.i161, label %cond_true.i163, label %cond_false.i178 + +cond_true.i163: ; preds = %cond_true.i35 + %tmp7.i162 = sdiv i32 %size, 4 ; <i32> [#uses=2] + %tmp13.i168 = tail call fastcc i32 @sum_adjacent( %struct.quad_struct* null, i32 3, i32 2, i32 %tmp7.i162 ) ; <i32> [#uses=1] + %tmp18.i11.i170 = getelementptr %struct.quad_struct* %tmp14.i.i37, i32 0, i32 4 ; <%struct.quad_struct**> [#uses=1] + %tmp19.i12.i171 = load %struct.quad_struct** %tmp18.i11.i170, align 4 ; <%struct.quad_struct*> [#uses=1] + %tmp21.i173 = tail call fastcc i32 @sum_adjacent( %struct.quad_struct* %tmp19.i12.i171, i32 3, i32 2, i32 %tmp7.i162 ) ; <i32> [#uses=1] + %tmp22.i174 = add i32 %tmp21.i173, %tmp13.i168 ; <i32> [#uses=1] + br i1 false, label %cond_true.i141, label %cond_false.i156 + +cond_false.i178: ; preds = %cond_true.i35 + ret i32 0 + +cond_true.i141: ; preds = %cond_true.i163 + %tmp7.i140 = sdiv i32 %size, 4 ; <i32> [#uses=1] + %tmp21.i151 = tail call fastcc i32 @sum_adjacent( %struct.quad_struct* null, i32 3, i32 2, i32 %tmp7.i140 ) ; <i32> [#uses=0] + ret i32 0 + +cond_false.i156: ; preds = %cond_true.i163 + %tmp22.i44 = add i32 0, %tmp22.i174 ; <i32> [#uses=0] + br i1 %tmp8.i51, label %bb22.i, label %cond_next.i + +bb80: ; preds = %cond_next + ret i32 0 + +cond_next.i: ; preds = %cond_false.i156 + ret i32 0 + +bb22.i: ; preds = %cond_false.i156 + ret i32 0 +} + +declare fastcc i32 @sum_adjacent(%struct.quad_struct*, i32, i32, i32) |