; RUN: llc -o - %s | FileCheck %s target triple = "arm64--" @out = internal global i32 0, align 4 ; Ensure that we transform select(C0, x, select(C1, x, y)) towards ; select(C0 | C1, x, y) so we can use CMP;CCMP for the implementation. ; CHECK-LABEL: test0: ; CHECK: cmp w0, #7 ; CHECK: ccmp w1, #0, #0, ne ; CHECK: csel w0, w1, w2, gt ; CHECK: ret define i32 @test0(i32 %v0, i32 %v1, i32 %v2) { %cmp1 = icmp eq i32 %v0, 7 %cmp2 = icmp sgt i32 %v1, 0 %sel0 = select i1 %cmp1, i32 %v1, i32 %v2 %sel1 = select i1 %cmp2, i32 %v1, i32 %sel0 ret i32 %sel1 } ; Usually we keep select(C0 | C1, x, y) as is on aarch64 to create CMP;CCMP ; sequences. This case should be transformed to select(C0, select(C1, x, y), y) ; anyway to get CSE effects. ; CHECK-LABEL: test1: ; CHECK-NOT: ccmp ; CHECK: cmp w0, #7 ; CHECK: adrp x[[OUTNUM:[0-9]+]], out ; CHECK: csel w[[SEL0NUM:[0-9]+]], w1, w2, eq ; CHECK: cmp w[[SEL0NUM]], #13 ; CHECK: csel w[[SEL1NUM:[0-9]+]], w1, w2, lo ; CHECK: cmp w0, #42 ; CHECK: csel w[[SEL2NUM:[0-9]+]], w1, w[[SEL1NUM]], eq ; CHECK: str w[[SEL1NUM]], [x[[OUTNUM]], :lo12:out] ; CHECK: str w[[SEL2NUM]], [x[[OUTNUM]], :lo12:out] ; CHECK: ret define void @test1(i32 %bitset, i32 %val0, i32 %val1) { %cmp1 = icmp eq i32 %bitset, 7 %cond = select i1 %cmp1, i32 %val0, i32 %val1 %cmp5 = icmp ult i32 %cond, 13 %cond11 = select i1 %cmp5, i32 %val0, i32 %val1 %cmp3 = icmp eq i32 %bitset, 42 %or.cond = or i1 %cmp3, %cmp5 %cond17 = select i1 %or.cond, i32 %val0, i32 %val1 store volatile i32 %cond11, i32* @out, align 4 store volatile i32 %cond17, i32* @out, align 4 ret void }