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40e6be6120
Don't expand divisions by constants if it would require multiple instructions. The current assumption is that engines will perform the desired optimizations. llvm-svn: 269930
63 lines
1.2 KiB
LLVM
63 lines
1.2 KiB
LLVM
; RUN: llc < %s -asm-verbose=false | FileCheck %s
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; Test that integer div and rem by constant are optimized appropriately.
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown"
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; CHECK-LABEL: test_udiv_2:
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; CHECK: i32.shr_u
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define i32 @test_udiv_2(i32 %x) {
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%t = udiv i32 %x, 2
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ret i32 %t
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}
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; CHECK-LABEL: test_udiv_5:
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; CHECK: i32.div_u
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define i32 @test_udiv_5(i32 %x) {
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%t = udiv i32 %x, 5
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ret i32 %t
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}
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; CHECK-LABEL: test_sdiv_2:
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; CHECK: i32.div_s
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define i32 @test_sdiv_2(i32 %x) {
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%t = sdiv i32 %x, 2
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ret i32 %t
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}
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; CHECK-LABEL: test_sdiv_5:
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; CHECK: i32.div_s
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define i32 @test_sdiv_5(i32 %x) {
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%t = sdiv i32 %x, 5
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ret i32 %t
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}
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; CHECK-LABEL: test_urem_2:
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; CHECK: i32.and
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define i32 @test_urem_2(i32 %x) {
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%t = urem i32 %x, 2
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ret i32 %t
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}
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; CHECK-LABEL: test_urem_5:
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; CHECK: i32.rem_u
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define i32 @test_urem_5(i32 %x) {
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%t = urem i32 %x, 5
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ret i32 %t
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}
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; CHECK-LABEL: test_srem_2:
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; CHECK: i32.rem_s
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define i32 @test_srem_2(i32 %x) {
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%t = srem i32 %x, 2
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ret i32 %t
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}
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; CHECK-LABEL: test_srem_5:
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; CHECK: i32.rem_s
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define i32 @test_srem_5(i32 %x) {
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%t = srem i32 %x, 5
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ret i32 %t
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}
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