You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
95 lines
2.7 KiB
95 lines
2.7 KiB
; RUN: llc -mtriple=aarch64-linux-gnu -mcpu=cortex-a57 -verify-machineinstrs < %s | FileCheck %s
|
|
|
|
; CHECK-LABEL: f_XX:
|
|
; CHECK: cbz x[[REG:[0-9]+]], [[BB:.LBB.*]]
|
|
; CHECK: [[BB]]:
|
|
; CHECK-NOT: mov x[[REG]], xzr
|
|
define i64 @f_XX(i64 %n, i64* nocapture readonly %P) {
|
|
entry:
|
|
%tobool = icmp eq i64 %n, 0
|
|
br i1 %tobool, label %if.end, label %if.then
|
|
|
|
if.then: ; preds = %entry
|
|
%0 = load i64, i64* %P
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %entry, %if.then
|
|
%a.0 = phi i64 [ %0, %if.then ], [ 0, %entry ]
|
|
ret i64 %a.0
|
|
}
|
|
|
|
; CHECK-LABEL: f_WW:
|
|
; CHECK: cbz w[[REG:[0-9]+]], [[BB:.LBB.*]]
|
|
; CHECK: [[BB]]:
|
|
; CHECK-NOT: mov w[[REG]], wzr
|
|
define i32 @f_WW(i32 %n, i32* nocapture readonly %P) {
|
|
entry:
|
|
%tobool = icmp eq i32 %n, 0
|
|
br i1 %tobool, label %if.end, label %if.then
|
|
|
|
if.then: ; preds = %entry
|
|
%0 = load i32, i32* %P
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %entry, %if.then
|
|
%a.0 = phi i32 [ %0, %if.then ], [ 0, %entry ]
|
|
ret i32 %a.0
|
|
}
|
|
|
|
; CHECK-LABEL: f_XW:
|
|
; CHECK: cbz x[[REG:[0-9]+]], [[BB:.LBB.*]]
|
|
; CHECK: [[BB]]:
|
|
; CHECK-NOT: mov w[[REG]], wzr
|
|
define i32 @f_XW(i64 %n, i32* nocapture readonly %P) {
|
|
entry:
|
|
%tobool = icmp eq i64 %n, 0
|
|
br i1 %tobool, label %if.end, label %if.then
|
|
|
|
if.then: ; preds = %entry
|
|
%0 = load i32, i32* %P
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %entry, %if.then
|
|
%a.0 = phi i32 [ %0, %if.then ], [ 0, %entry ]
|
|
ret i32 %a.0
|
|
}
|
|
|
|
; CHECK-LABEL: f_WX:
|
|
; CHECK: cbz w[[REG:[0-9]+]], [[BB:.LBB.*]]
|
|
; CHECK: [[BB]]:
|
|
; CHECK: mov x[[REG]], xzr
|
|
; Do not remove the mov in this case because we do not know if the upper bits
|
|
; of the X register are zero.
|
|
define i64 @f_WX(i32 %n, i64* nocapture readonly %P) {
|
|
entry:
|
|
%tobool = icmp eq i32 %n, 0
|
|
br i1 %tobool, label %if.end, label %if.then
|
|
|
|
if.then: ; preds = %entry
|
|
%0 = load i64, i64* %P
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %entry, %if.then
|
|
%a.0 = phi i64 [ %0, %if.then ], [ 0, %entry ]
|
|
ret i64 %a.0
|
|
}
|
|
|
|
; CHECK-LABEL: test_superreg:
|
|
; CHECK: cbz x[[REG:[0-9]+]], [[BB:.LBB.*]]
|
|
; CHECK: [[BB]]:
|
|
; CHECK: str x[[REG]], [x1]
|
|
; CHECK-NOT: mov w[[REG]], wzr
|
|
; Because we returned w0 but x0 was marked live-in to the block, we didn't
|
|
; remove the <kill> on the str leading to a verification failure.
|
|
define i32 @test_superreg(i64 %in, i64* %dest) {
|
|
%tst = icmp eq i64 %in, 0
|
|
br i1 %tst, label %true, label %false
|
|
|
|
false:
|
|
ret i32 42
|
|
|
|
true:
|
|
store volatile i64 %in, i64* %dest
|
|
ret i32 0
|
|
}
|