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https://github.com/c64scene-ar/llvm-6502.git
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cd2647f4fd
If the compare in a select pattern has another use then it can't be removed, so we'd just be creating repeated code if we created a min/max node. Spotted by Matt Arsenault! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239037 91177308-0d34-0410-b5e6-96231b3b80d8
108 lines
2.7 KiB
LLVM
108 lines
2.7 KiB
LLVM
; RUN: llc < %s -mtriple=aarch64-linux-gnu | FileCheck %s
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; CHECK-LABEL: t1
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; CHECK: smax
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define <4 x i32> @t1(<4 x i32> %a, <4 x i32> %b) {
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%t1 = icmp sgt <4 x i32> %a, %b
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%t2 = select <4 x i1> %t1, <4 x i32> %a, <4 x i32> %b
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ret <4 x i32> %t2
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}
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; CHECK-LABEL: t2
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; CHECK: smin
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define <4 x i32> @t2(<4 x i32> %a, <4 x i32> %b) {
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%t1 = icmp slt <4 x i32> %a, %b
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%t2 = select <4 x i1> %t1, <4 x i32> %a, <4 x i32> %b
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ret <4 x i32> %t2
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}
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; CHECK-LABEL: t3
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; CHECK: umax
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define <4 x i32> @t3(<4 x i32> %a, <4 x i32> %b) {
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%t1 = icmp ugt <4 x i32> %a, %b
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%t2 = select <4 x i1> %t1, <4 x i32> %a, <4 x i32> %b
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ret <4 x i32> %t2
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}
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; CHECK-LABEL: t4
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; CHECK: umin
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define <8 x i8> @t4(<8 x i8> %a, <8 x i8> %b) {
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%t1 = icmp ult <8 x i8> %a, %b
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%t2 = select <8 x i1> %t1, <8 x i8> %a, <8 x i8> %b
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ret <8 x i8> %t2
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}
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; CHECK-LABEL: t5
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; CHECK: smin
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define <4 x i16> @t5(<4 x i16> %a, <4 x i16> %b) {
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%t1 = icmp sgt <4 x i16> %b, %a
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%t2 = select <4 x i1> %t1, <4 x i16> %a, <4 x i16> %b
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ret <4 x i16> %t2
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}
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; CHECK-LABEL: t6
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; CHECK: smax
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define <2 x i32> @t6(<2 x i32> %a, <2 x i32> %b) {
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%t1 = icmp slt <2 x i32> %b, %a
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%t2 = select <2 x i1> %t1, <2 x i32> %a, <2 x i32> %b
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ret <2 x i32> %t2
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}
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; CHECK-LABEL: t7
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; CHECK: umin
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define <16 x i8> @t7(<16 x i8> %a, <16 x i8> %b) {
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%t1 = icmp ugt <16 x i8> %b, %a
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%t2 = select <16 x i1> %t1, <16 x i8> %a, <16 x i8> %b
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ret <16 x i8> %t2
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}
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; CHECK-LABEL: t8
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; CHECK: umax
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define <8 x i16> @t8(<8 x i16> %a, <8 x i16> %b) {
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%t1 = icmp ult <8 x i16> %b, %a
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%t2 = select <8 x i1> %t1, <8 x i16> %a, <8 x i16> %b
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ret <8 x i16> %t2
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}
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; CHECK-LABEL: t9
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; CHECK: umin
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; CHECK: smax
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define <4 x i32> @t9(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
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%t1 = icmp ugt <4 x i32> %b, %a
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%t2 = select <4 x i1> %t1, <4 x i32> %a, <4 x i32> %b
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%t3 = icmp sge <4 x i32> %t2, %c
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%t4 = select <4 x i1> %t3, <4 x i32> %t2, <4 x i32> %c
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ret <4 x i32> %t4
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}
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; CHECK-LABEL: t10
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; CHECK: smax
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; CHECK: smax
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define <8 x i32> @t10(<8 x i32> %a, <8 x i32> %b) {
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%t1 = icmp sgt <8 x i32> %a, %b
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%t2 = select <8 x i1> %t1, <8 x i32> %a, <8 x i32> %b
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ret <8 x i32> %t2
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}
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; CHECK-LABEL: t11
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; CHECK: smin
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; CHECK: smin
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; CHECK: smin
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; CHECK: smin
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define <16 x i32> @t11(<16 x i32> %a, <16 x i32> %b) {
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%t1 = icmp sle <16 x i32> %a, %b
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%t2 = select <16 x i1> %t1, <16 x i32> %a, <16 x i32> %b
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ret <16 x i32> %t2
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}
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; CHECK-LABEL: t12
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; CHECK-NOT: umin
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; The icmp is used by two instructions, so don't produce a umin node.
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define <16 x i8> @t12(<16 x i8> %a, <16 x i8> %b) {
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%t1 = icmp ugt <16 x i8> %b, %a
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%t2 = select <16 x i1> %t1, <16 x i8> %a, <16 x i8> %b
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%t3 = zext <16 x i1> %t1 to <16 x i8>
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%t4 = add <16 x i8> %t3, %t2
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ret <16 x i8> %t4
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}
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