eecb99c5f6
These tests rely on SCEV looking recognizing an "or" with no common bits as an "add". Add the disjoint flag to relevant or instructions in preparation for switching SCEV to use the flag instead of the ValueTracking query. The IR with disjoint flag matches what InstCombine would produce.
67 lines
2.8 KiB
LLVM
67 lines
2.8 KiB
LLVM
; RUN: llc < %s -mtriple=i686-apple-darwin -relocation-model=static | FileCheck %s -check-prefix=STATIC
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; RUN: llc < %s -mtriple=i686-apple-darwin -relocation-model=pic | FileCheck %s -check-prefix=PIC
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; By starting the IV at -64 instead of 0, a cmp is eliminated,
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; as the flags from the add can be used directly.
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; STATIC: movl $-64, [[EAX:%e..]]
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; STATIC: movl %{{.+}}, _state+76([[EAX]])
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; STATIC: addl $16, [[EAX]]
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; STATIC: jne
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; The same for PIC mode.
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; PIC: movl $-64, [[EAX:%e..]]
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; PIC: movl %{{.+}}, 76(%{{.+}},[[EAX]])
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; PIC: addl $16, [[EAX]]
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; PIC: jne
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@state = external global [0 x i32] ; <ptr> [#uses=4]
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@S = external global [0 x i32] ; <ptr> [#uses=4]
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define i32 @foo() nounwind {
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entry:
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br label %bb
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bb: ; preds = %bb, %entry
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%indvar = phi i32 [ 0, %entry ], [ %indvar.next, %bb ] ; <i32> [#uses=2]
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%t.063.0 = phi i32 [ 0, %entry ], [ %tmp47, %bb ] ; <i32> [#uses=1]
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%j.065.0 = shl i32 %indvar, 2 ; <i32> [#uses=4]
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%tmp3 = getelementptr [0 x i32], ptr @state, i32 0, i32 %j.065.0 ; <ptr> [#uses=2]
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%tmp4 = load i32, ptr %tmp3, align 4 ; <i32> [#uses=1]
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%tmp6 = getelementptr [0 x i32], ptr @S, i32 0, i32 %t.063.0 ; <ptr> [#uses=1]
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%tmp7 = load i32, ptr %tmp6, align 4 ; <i32> [#uses=1]
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%tmp8 = xor i32 %tmp7, %tmp4 ; <i32> [#uses=2]
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store i32 %tmp8, ptr %tmp3, align 4
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%tmp1378 = or disjoint i32 %j.065.0, 1 ; <i32> [#uses=1]
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%tmp16 = getelementptr [0 x i32], ptr @state, i32 0, i32 %tmp1378 ; <ptr> [#uses=2]
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%tmp17 = load i32, ptr %tmp16, align 4 ; <i32> [#uses=1]
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%tmp19 = getelementptr [0 x i32], ptr @S, i32 0, i32 %tmp8 ; <ptr> [#uses=1]
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%tmp20 = load i32, ptr %tmp19, align 4 ; <i32> [#uses=1]
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%tmp21 = xor i32 %tmp20, %tmp17 ; <i32> [#uses=2]
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store i32 %tmp21, ptr %tmp16, align 4
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%tmp2680 = or disjoint i32 %j.065.0, 2 ; <i32> [#uses=1]
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%tmp29 = getelementptr [0 x i32], ptr @state, i32 0, i32 %tmp2680 ; <ptr> [#uses=2]
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%tmp30 = load i32, ptr %tmp29, align 4 ; <i32> [#uses=1]
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%tmp32 = getelementptr [0 x i32], ptr @S, i32 0, i32 %tmp21 ; <ptr> [#uses=1]
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%tmp33 = load i32, ptr %tmp32, align 4 ; <i32> [#uses=1]
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%tmp34 = xor i32 %tmp33, %tmp30 ; <i32> [#uses=2]
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store i32 %tmp34, ptr %tmp29, align 4
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%tmp3982 = or disjoint i32 %j.065.0, 3 ; <i32> [#uses=1]
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%tmp42 = getelementptr [0 x i32], ptr @state, i32 0, i32 %tmp3982 ; <ptr> [#uses=2]
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%tmp43 = load i32, ptr %tmp42, align 4 ; <i32> [#uses=1]
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%tmp45 = getelementptr [0 x i32], ptr @S, i32 0, i32 %tmp34 ; <ptr> [#uses=1]
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%tmp46 = load i32, ptr %tmp45, align 4 ; <i32> [#uses=1]
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%tmp47 = xor i32 %tmp46, %tmp43 ; <i32> [#uses=3]
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store i32 %tmp47, ptr %tmp42, align 4
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%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2]
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%exitcond = icmp eq i32 %indvar.next, 4 ; <i1> [#uses=1]
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br i1 %exitcond, label %bb57, label %bb
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bb57: ; preds = %bb
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%tmp59 = and i32 %tmp47, 255 ; <i32> [#uses=1]
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ret i32 %tmp59
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}
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