44 lines
1.0 KiB
LLVM
44 lines
1.0 KiB
LLVM
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=+idivl-to-divb < %s | FileCheck -check-prefix=DIV32 %s
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; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=+idivq-to-divw < %s | FileCheck -check-prefix=DIV64 %s
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define i32 @div32(i32 %a, i32 %b) {
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entry:
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; DIV32-LABEL: div32:
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; DIV32: orl %{{.*}}, [[REG:%[a-z]+]]
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; DIV32: testl $-256, [[REG]]
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; DIV32: divb
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; DIV64-LABEL: div32:
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; DIV64-NOT: divb
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%div = sdiv i32 %a, %b
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ret i32 %div
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}
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define i64 @div64(i64 %a, i64 %b) {
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entry:
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; DIV32-LABEL: div64:
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; DIV32-NOT: divw
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; DIV64-LABEL: div64:
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; DIV64: orq %{{.*}}, [[REG:%[a-z]+]]
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; DIV64: testq $-65536, [[REG]]
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; DIV64: divw
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%div = sdiv i64 %a, %b
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ret i64 %div
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}
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; Verify that no extra code is generated when optimizing for size.
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define i32 @div32_optsize(i32 %a, i32 %b) optsize {
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; DIV32-LABEL: div32_optsize:
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; DIV32-NOT: divb
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%div = sdiv i32 %a, %b
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ret i32 %div
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}
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define i32 @div32_minsize(i32 %a, i32 %b) minsize {
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; DIV32-LABEL: div32_minsize:
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; DIV32-NOT: divb
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%div = sdiv i32 %a, %b
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ret i32 %div
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}
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