bfx.ll
1.69 KB
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; RUN: llc -mtriple=arm-eabi -mattr=+v7 %s -o - | FileCheck %s
define i32 @sbfx1(i32 %a) {
; CHECK: sbfx1
; CHECK: sbfx r0, r0, #7, #11
%t1 = lshr i32 %a, 7
%t2 = trunc i32 %t1 to i11
%t3 = sext i11 %t2 to i32
ret i32 %t3
}
define i32 @ubfx1(i32 %a) {
; CHECK: ubfx1
; CHECK: ubfx r0, r0, #7, #11
%t1 = lshr i32 %a, 7
%t2 = trunc i32 %t1 to i11
%t3 = zext i11 %t2 to i32
ret i32 %t3
}
define i32 @ubfx2(i32 %a) {
; CHECK: ubfx2
; CHECK: ubfx r0, r0, #7, #11
%t1 = lshr i32 %a, 7
%t2 = and i32 %t1, 2047
ret i32 %t2
}
; rdar://12870177
define i32 @ubfx_opt(i32* nocapture %ctx, i32 %x) nounwind readonly ssp {
entry:
; CHECK: ubfx_opt
; CHECK: lsr [[REG1:(lr|r[0-9]+)]], r1, #24
; CHECK: ldr {{lr|r[0-9]+}}, [r0, [[REG1]], lsl #2]
; CHECK: ubfx [[REG2:(lr|r[0-9]+)]], r1, #16, #8
; CHECK: ldr {{lr|r[0-9]+}}, [r0, [[REG2]], lsl #2]
; CHECK: ubfx [[REG3:(lr|r[0-9]+)]], r1, #8, #8
; CHECK: ldr {{lr|r[0-9]+}}, [r0, [[REG3]], lsl #2]
%and = lshr i32 %x, 8
%shr = and i32 %and, 255
%and1 = lshr i32 %x, 16
%shr2 = and i32 %and1, 255
%shr4 = lshr i32 %x, 24
%arrayidx = getelementptr inbounds i32, i32* %ctx, i32 %shr4
%0 = load i32, i32* %arrayidx, align 4
%arrayidx5 = getelementptr inbounds i32, i32* %ctx, i32 %shr2
%1 = load i32, i32* %arrayidx5, align 4
%add = add i32 %1, %0
%arrayidx6 = getelementptr inbounds i32, i32* %ctx, i32 %shr
%2 = load i32, i32* %arrayidx6, align 4
%add7 = add i32 %add, %2
ret i32 %add7
}
define i32 @ubfx3(i32 %a) {
; CHECK: ubfx3
; CHECK: ubfx r0, r0, #11, #1
%t1 = and i32 %a, 2048
%t2 = lshr i32 %t1, 11
ret i32 %t2
}
define i32 @ubfx4(i32 %a) {
; CHECK: ubfx4
; CHECK: ubfx r0, r0, #7, #3
%t1 = and i32 %a, 896
%t2 = lshr i32 %t1, 7
ret i32 %t2
}