maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/CodeGen/X86/win32-pic-jumptable.ll

39 lines
819 B
LLVM
Raw Normal View History

Compute the correct jump table entries on 32 bit windows. On 32 bit windows we use label differences and .set does not suppress rolocations, a combination that was not used before r220256. This fixes PR21497. llvm-svn: 221456
2014-11-06 22:39:49 +08:00
; RUN: llc < %s -relocation-model=pic | FileCheck %s
; CHECK: calll L0$pb
[X86] Always generate precise CFA adjustments. This removes the code path that generate "synchronous" (only correct at call site) CFA. We will probably want to re-introduce it once we are capable of emitting different .eh_frame and .debug_frame sections. Differential Revision: http://reviews.llvm.org/D14948 llvm-svn: 254874
2015-12-06 21:06:20 +08:00
; CHECK-NEXT: .cfi_adjust_cfa_offset 4
Compute the correct jump table entries on 32 bit windows. On 32 bit windows we use label differences and .set does not suppress rolocations, a combination that was not used before r220256. This fixes PR21497. llvm-svn: 221456
2014-11-06 22:39:49 +08:00
; CHECK-NEXT: L0$pb:
; CHECK-NEXT: popl %eax
[X86] Always generate precise CFA adjustments. This removes the code path that generate "synchronous" (only correct at call site) CFA. We will probably want to re-introduce it once we are capable of emitting different .eh_frame and .debug_frame sections. Differential Revision: http://reviews.llvm.org/D14948 llvm-svn: 254874
2015-12-06 21:06:20 +08:00
; CHECK-NEXT: .cfi_adjust_cfa_offset -4
Compute the correct jump table entries on 32 bit windows. On 32 bit windows we use label differences and .set does not suppress rolocations, a combination that was not used before r220256. This fixes PR21497. llvm-svn: 221456
2014-11-06 22:39:49 +08:00
; CHECK-NEXT: addl LJTI0_0(,%ecx,4), %eax
; CHECK-NEXT: jmpl *%eax
; CHECK: LJTI0_0:
X86: More efficient legalization of wide integer compares In particular, this makes the code for 64-bit compares on 32-bit targets much more efficient. Example: define i32 @test_slt(i64 %a, i64 %b) { entry: %cmp = icmp slt i64 %a, %b br i1 %cmp, label %bb1, label %bb2 bb1: ret i32 1 bb2: ret i32 2 } Before this patch: test_slt: movl 4(%esp), %eax movl 8(%esp), %ecx cmpl 12(%esp), %eax setae %al cmpl 16(%esp), %ecx setge %cl je .LBB2_2 movb %cl, %al .LBB2_2: testb %al, %al jne .LBB2_4 movl $1, %eax retl .LBB2_4: movl $2, %eax retl After this patch: test_slt: movl 4(%esp), %eax movl 8(%esp), %ecx cmpl 12(%esp), %eax sbbl 16(%esp), %ecx jge .LBB1_2 movl $1, %eax retl .LBB1_2: movl $2, %eax retl Differential Revision: http://reviews.llvm.org/D14496 llvm-svn: 253572
2015-11-20 00:35:08 +08:00
; CHECK-NEXT: .long LBB0_2-L0$pb
; CHECK-NEXT: .long LBB0_3-L0$pb
Compute the correct jump table entries on 32 bit windows. On 32 bit windows we use label differences and .set does not suppress rolocations, a combination that was not used before r220256. This fixes PR21497. llvm-svn: 221456
2014-11-06 22:39:49 +08:00
; CHECK-NEXT: .long LBB0_4-L0$pb
; CHECK-NEXT: .long LBB0_5-L0$pb
target triple = "i686--windows-itanium"
define i32 @f(i64 %x) {
bb0:
switch i64 %x, label %bb5 [
i64 1, label %bb1
i64 2, label %bb2
i64 3, label %bb3
i64 4, label %bb4
]
bb1:
br label %bb5
bb2:
br label %bb5
bb3:
br label %bb5
bb4:
br label %bb5
bb5:
%y = phi i32 [ 0, %bb0 ], [ 1, %bb1 ], [ 2, %bb2 ], [ 3, %bb3 ], [ 4, %bb4 ]
ret i32 %y
}