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Diffstat (limited to 'test/CodeGen/X86/lea-neg.ll')
-rw-r--r-- | test/CodeGen/X86/lea-neg.ll | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/test/CodeGen/X86/lea-neg.ll b/test/CodeGen/X86/lea-neg.ll new file mode 100644 index 0000000000..6b2b61c097 --- /dev/null +++ b/test/CodeGen/X86/lea-neg.ll @@ -0,0 +1,25 @@ +; RUN: llc < %s -march=x86-64 > %t +; RUN: grep negl %t | count 1 +; RUN: not grep {sub\[bwlq\]} %t +; RUN: grep mov %t | count 1 +; RUN: grep {leal -4(} %t | count 1 + +; ISel the add of -4 with a neg and use an lea for the rest of the +; arithemtic. + +define i32 @test(i32 %x_offs) nounwind readnone { +entry: + %t0 = icmp sgt i32 %x_offs, 4 ; <i1> [#uses=1] + br i1 %t0, label %bb.nph, label %bb2 + +bb.nph: ; preds = %entry + %tmp = add i32 %x_offs, -5 ; <i32> [#uses=1] + %tmp6 = lshr i32 %tmp, 2 ; <i32> [#uses=1] + %tmp7 = mul i32 %tmp6, -4 ; <i32> [#uses=1] + %tmp8 = add i32 %tmp7, %x_offs ; <i32> [#uses=1] + %tmp9 = add i32 %tmp8, -4 ; <i32> [#uses=1] + ret i32 %tmp9 + +bb2: ; preds = %entry + ret i32 %x_offs +} |