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3d28b1b35b
(add (sext x), cst) --> (sext (add x, cst')) (add (sext x), (sext y)) --> (sext (add int x, y)) (add double (sitofp x), fpcst) --> (sitofp (add int x, intcst)) (add double (sitofp x), (sitofp y)) --> (sitofp (add int x, y)) This generally reduces conversions. For example MiBench/telecomm-gsm gets these simplifications: HACK2: %tmp67.i142.i.i = sext i16 %tmp6.i141.i.i to i32 ; <i32> [#uses=1] %tmp23.i139.i.i = sext i16 %tmp2.i138.i.i to i32 ; <i32> [#uses=1] %tmp8.i143.i.i = add i32 %tmp67.i142.i.i, %tmp23.i139.i.i ; <i32> [#uses=3] HACK2: %tmp67.i121.i.i = sext i16 %tmp6.i120.i.i to i32 ; <i32> [#uses=1] %tmp23.i118.i.i = sext i16 %tmp2.i117.i.i to i32 ; <i32> [#uses=1] %tmp8.i122.i.i = add i32 %tmp67.i121.i.i, %tmp23.i118.i.i ; <i32> [#uses=3] HACK2: %tmp67.i.i190.i = sext i16 %tmp6.i.i189.i to i32 ; <i32> [#uses=1] %tmp23.i.i187.i = sext i16 %tmp2.i.i186.i to i32 ; <i32> [#uses=1] %tmp8.i.i191.i = add i32 %tmp67.i.i190.i, %tmp23.i.i187.i ; <i32> [#uses=3] HACK2: %tmp67.i173.i.i.i = sext i16 %tmp6.i172.i.i.i to i32 ; <i32> [#uses=1] %tmp23.i170.i.i.i = sext i16 %tmp2.i169.i.i.i to i32 ; <i32> [#uses=1] %tmp8.i174.i.i.i = add i32 %tmp67.i173.i.i.i, %tmp23.i170.i.i.i ; <i32> [#uses=3] HACK2: %tmp67.i152.i.i.i = sext i16 %tmp6.i151.i.i.i to i32 ; <i32> [#uses=1] %tmp23.i149.i.i.i = sext i16 %tmp2.i148.i.i.i to i32 ; <i32> [#uses=1] %tmp8.i153.i.i.i = add i32 %tmp67.i152.i.i.i, %tmp23.i149.i.i.i ; <i32> [#uses=3] HACK2: %tmp67.i.i.i.i = sext i16 %tmp6.i.i.i.i to i32 ; <i32> [#uses=1] %tmp23.i.i5.i.i = sext i16 %tmp2.i.i.i.i to i32 ; <i32> [#uses=1] %tmp8.i.i7.i.i = add i32 %tmp67.i.i.i.i, %tmp23.i.i5.i.i ; <i32> [#uses=3] This also fixes a bug in ComputeNumSignBits handling select and makes it more aggressive with and/or. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51302 91177308-0d34-0410-b5e6-96231b3b80d8
44 lines
1017 B
LLVM
44 lines
1017 B
LLVM
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep sitofp
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define i1 @test1(i8 %A) {
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%B = sitofp i8 %A to double
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%C = fcmp ult double %B, 128.0
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ret i1 %C ; True!
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}
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define i1 @test2(i8 %A) {
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%B = sitofp i8 %A to double
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%C = fcmp ugt double %B, -128.1
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ret i1 %C ; True!
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}
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define i1 @test3(i8 %A) {
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%B = sitofp i8 %A to double
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%C = fcmp ule double %B, 127.0
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ret i1 %C ; true!
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}
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define i1 @test4(i8 %A) {
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%B = sitofp i8 %A to double
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%C = fcmp ult double %B, 127.0
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ret i1 %C ; A != 127
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}
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define i32 @test5(i32 %A) {
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%B = sitofp i32 %A to double
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%C = fptosi double %B to i32
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%D = uitofp i32 %C to double
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%E = fptoui double %D to i32
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ret i32 %E
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}
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define i32 @test6(i32 %A) {
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%B = and i32 %A, 7 ; <i32> [#uses=1]
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%C = and i32 %A, 32 ; <i32> [#uses=1]
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%D = sitofp i32 %B to double ; <double> [#uses=1]
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%E = sitofp i32 %C to double ; <double> [#uses=1]
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%F = add double %D, %E ; <double> [#uses=1]
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%G = fptosi double %F to i32 ; <i32> [#uses=1]
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ret i32 %G
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}
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