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https://github.com/c64scene-ar/llvm-6502.git
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a3fb49cd85
value is zero. This allows optmizations to kick in more easily. Fix some test cases so that they remain meaningful (i.e., not completely dead coded) when optimizations apply. <rdar://problem/14096009> superfluous multiply by high part of zero-extended value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184222 91177308-0d34-0410-b5e6-96231b3b80d8
75 lines
1.6 KiB
LLVM
75 lines
1.6 KiB
LLVM
; RUN: llc < %s -march=arm | grep mvn | count 9
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define i32 @f1() {
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entry:
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ret i32 -1
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}
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define i32 @f2(i32 %a) {
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entry:
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%tmpnot = xor i32 %a, -1 ; <i32> [#uses=1]
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ret i32 %tmpnot
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}
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define i32 @f3(i32 %a) {
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entry:
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%tmp1 = shl i32 %a, 2 ; <i32> [#uses=1]
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%tmp1not = xor i32 %tmp1, -1 ; <i32> [#uses=1]
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ret i32 %tmp1not
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}
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define i32 @f4(i32 %a, i8 %b) {
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entry:
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%shift.upgrd.1 = zext i8 %b to i32 ; <i32> [#uses=1]
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%tmp3 = shl i32 %a, %shift.upgrd.1 ; <i32> [#uses=1]
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%tmp3not = xor i32 %tmp3, -1 ; <i32> [#uses=1]
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ret i32 %tmp3not
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}
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define i32 @f5(i32 %a) {
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entry:
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%tmp1 = lshr i32 %a, 2 ; <i32> [#uses=1]
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%tmp1not = xor i32 %tmp1, -1 ; <i32> [#uses=1]
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ret i32 %tmp1not
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}
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define i32 @f6(i32 %a, i8 %b) {
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entry:
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%shift.upgrd.2 = zext i8 %b to i32 ; <i32> [#uses=1]
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%tmp2 = lshr i32 %a, %shift.upgrd.2 ; <i32> [#uses=1]
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%tmp2not = xor i32 %tmp2, -1 ; <i32> [#uses=1]
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ret i32 %tmp2not
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}
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define i32 @f7(i32 %a) {
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entry:
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%tmp1 = ashr i32 %a, 2 ; <i32> [#uses=1]
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%tmp1not = xor i32 %tmp1, -1 ; <i32> [#uses=1]
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ret i32 %tmp1not
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}
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define i32 @f8(i32 %a, i8 %b) {
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entry:
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%shift.upgrd.3 = zext i8 %b to i32 ; <i32> [#uses=1]
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%tmp3 = ashr i32 %a, %shift.upgrd.3 ; <i32> [#uses=1]
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%tmp3not = xor i32 %tmp3, -1 ; <i32> [#uses=1]
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ret i32 %tmp3not
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}
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define i32 @f9() {
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entry:
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%tmp4845 = add i32 0, 0 ; <i32> [#uses=1]
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br label %cond_true4848
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cond_true4848: ; preds = %entry
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%tmp4851 = sub i32 -3, 0 ; <i32> [#uses=1]
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%abc = add i32 %tmp4851, %tmp4845 ; <i32> [#uses=1]
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ret i32 %abc
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}
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define i1 @f10(i32 %a) {
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entry:
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%tmp102 = icmp eq i32 -2, %a ; <i1> [#uses=1]
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ret i1 %tmp102
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}
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